Effect of attapulgite on heavy metals passivation and microbial community during co-composting of river sediment with agricultural wastes
作者：
Chen, Yaoning;Tang, Ping;Li, Yuanping;Chen, Li;Jiang, Hongjuan;...
期刊：
Chemosphere ,2022年299:134347 ISSN：0045-6535
通讯作者：
Chen, Yaoning(cyn@hnu.edu.cn);Li, Yuanping(yuanpingli@hncu.edu.cn)
作者机构：
[Chen, Yaoning; Tang, Ping; Chen, Li; Jiang, Hongjuan; Liu, Yihuan; Luo, Xinli] College of Environmental Science and Engineering, Hunan University, Changsha;410082, China;Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha;[Li, Yuanping] College of Municipal and Mapping Engineering, Hunan City University, Hunan, Yiyang;413000, China
通讯机构：
[Yaoning Chen; Yuanping Li] C;College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China<&wdkj&>Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, China<&wdkj&>College of Municipal and Mapping Engineering, Hunan City University, Yiyang, Hunan, 413000, China
关键词：
Attapulgite;Co-composting;Heavy metals;Microbial community;Remediation;Sediment
摘要：
This paper investigated the effects of attapulgite addition on the physicochemical processes, heavy metal transformation, and microbial community during the composting of agricultural wastes and sediment. In addition, the correlation between environmental factors, heavy metals (HMs), and microbial community was also assessed by redundancy analysis (RDA). The results showed that pile B with attapulgite addition entered the thermophilic phase earlier and lasted longer than pile A as the control group. The reduction in the bioavailability of HMs (Cr, Cd, and Zn) was also greater in pile B, and the passivation of HMs was ranked as Cd > Zn > Cr. The relative abundance of phylum Proteobacteria, Firmicutes, Bacteroidetes, and Actinobacteria was the highest throughout the composting process. Furthermore, the RDA showed that the bacterial community composition was significantly correlated with temperature and C/N ratio in pile A, while significantly correlated with organic matter and pH in pile B. And the addition of attapulgite facilitated the conversion of HMs into more stable fractions by Pseudomonas. The study would provide a reference for the application of attapulgite to remediate the river sediment polluted by HMs. © 2022 Elsevier Ltd
语种：
英文
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Comparison of the thermal comfort of pregnant women at different stages of pregnancy in a subtropical region
作者：
Peng, Ting;Fang, Wenxiang;Jiang, Xiangyang;Yang, Yanping;Fang, Zhaosong;...
期刊：
Building and Environment ,2022年219:109121 ISSN：0360-1323
通讯作者：
Fang, Zhaosong(zhaosong0102@gzhu.edu.cn);Zheng, Zhimin(gdtm2012@126.com)
作者机构：
[Fang, Zhaosong; Peng, Ting; Yang, Yanping; Zheng, Zhimin] Guangzhou Univ, Sch Civil Engn, Guangzhou 510006, Peoples R China.;[Peng, Ting] Hunan City Univ, Sch Municipal & Geomat Engn, Yiyang 413000, Peoples R China.;[Fang, Wenxiang] Guangzhou Yuexiu Women & Children Hosp, Guangzhou 510006, Peoples R China.;[Jiang, Xiangyang] Guangzhou Inst Bldg Sci Co LTD, Guangzhou 510006, Peoples R China.;[Fang, Wenxiang] Hlth Inst, Guangzhou 510006, Peoples R China.
通讯机构：
[Zhaosong Fang; Zhimin Zheng] T;The School of Civil Engineering, Guangzhou University, Guangzhou, 510006, China
关键词：
Neutral operative temperature;Obstetrics waiting areas;Preferred temperature;Pregnancy stages;Thermal perception
摘要：
During pregnancy, owing to several physiological and psychological changes, the perception of heat by pregnant women changes, leading to them having different heat requirements. In this study, our objective was to determine the differences in the thermal perceptions of pregnant women at different stages of pregnancy (i.e., first, second, and third trimesters). Thus, we conducted an environmental parameter test on the obstetrics waiting rooms of four hospitals in Guangzhou and also administered a questionnaire survey to the waiting pregnant women. A total of 1043 questionnaires were collected during the survey (723 and 302 in summer and winter, respectively), after which the collected data was processed and statistically analyzed. Our results showed that with pregnancy development, the clothing resistance of pregnant women decreased, while their thermal sensation vote increased. Further, the mean neutral operative temperature values for the pregnant women in summer were 26.8, 25.2, and 24.1 °C, and in winter were 20.9, 19.6, and 18.9 °C during the first, second, and third trimesters, respectively. Furthermore, their preferred operative temperature values in summer were 25.8, 24.6, and 23.1 °C and in winter were 24.3, 24.0, and 22.8 °C during the first, second, and third trimesters, respectively. Thus, our results indicated that the perception of heat by pregnant women is dynamic, and increases with the development of pregnancy. These findings have guiding significance with respect to controlling the environment of the obstetrics waiting environments. © 2022 Elsevier Ltd
语种：
英文
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Study on occupant behaviour using air conditioning of high-rise residential buildings in hot summer and cold winter zone in China
作者：
Duan, Jiaojiao;Li, Nianping;Peng, Jinqing;Wang, Chenhua;Liu, Qingqing;...
期刊：
Energy and Buildings ,2022年276:112498 ISSN：0378-7788
通讯作者：
Li, Nianping(linianping@hnu.edu.cn)
作者机构：
[Li, Nianping; Peng, Jinqing; Liu, Qingqing; Duan, Jiaojiao] Hunan Univ, Coll Civil Engn, Changsha 410082, Hunan, Peoples R China.;[Zhou, Xuehua; Duan, Jiaojiao] Hunan City Univ, Sch Municipal & Geomat Engn, Yiyang 413099, Peoples R China.;[Li, Nianping; Peng, Jinqing; Liu, Qingqing; Duan, Jiaojiao] Hunan Univ, Key Lab Bldg Safety & Energy Efficiency, Minist Educ, Changsha, Peoples R China.;[Zhou, Xuehua] Natl & Local Joint Engn Res Ctr Airborne Pollutant, Hengyang 421001, Peoples R China.
通讯机构：
[Nianping Li] C;College of Civil Engineering, Hunan University, Changsha, Hunan 410082, China<&wdkj&>Key Laboratory of Building Safety and Energy Efficiency (Hunan University), Ministry of Education, China
关键词：
Air conditioning (AC);High-rise residential building;Occupant behaviour;Start-up temperature;Start–stop time;Statistical analysis
摘要：
Over the past two decades, the electricity consumption of residential air conditioning (AC) has increased by 13.4 times. Moreover, carbon emissions from building operations remain high. Occupant behaviour related to AC operation is the most significant factor affecting the energy consumption of residential ACs. Hence, in this study, occupant behaviour towards using air conditioning in high-rise residential buildings was analysed to provide suggestions for increasing the AC usage efficiency. Annual data on the AC power consumption, indoor temperature, and humidity of typical high-rise residential buildings in hot summer and cold winter zones in China were collected. Five target parameters—AC opening rate, AC standby rate, start–stop time, start–stop temperature, and stable temperature—were statistically analysed. The results reveal that the AC start–stop time follows a normal distribution. The start and stop times of the AC during the cooling period are 22:32 and 7:05 the next day, respectively, whereas during the heating periods these values were 20:42 and 23:02 or 7:56 the next day, respectively. The standard deviation of the time distribution of AC starting or stopping at night is larger than that during the day. The AC start-up temperature followed an exponential distribution. The indoor temperature during the cooling and heating periods is more than 29.42 °C and less than 11.08 °C, respectively. The opening rate of the room AC is 80 %. © 2022 Elsevier B.V.
语种：
英文
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Petrogenesis and tectonic implications of Late Triassic granitoids in the Alananshan, East Kunlun belt: evidence from geochemistry, geochronology, and zircon Hf isotopic compositions
作者：
Zhen Xi;Huan Li;Safiyanu Muhammad Elatikpo;Guangming Gao;Decheng Ma
期刊：
地球化学学报(英文) ,2022年41(6):947-967 ISSN：2096-0956
通讯作者：
Li, Huan(lihuan@csu.edu.cn)
作者机构：
[Zhen Xi] School of Municipal and Geomatics Engineering, Hunan City University, Yiyang;413000, China;[Huan Li; Safiyanu Muhammad Elatikpo; Guangming Gao] School of Geosciences and Info-Physics, Central South University, Changsha;410083, China;Department of Geology, Ahmadu Bello University, Zaria, Nigeria
通讯机构：
[Huan Li] S;School of Geosciences and Info-Physics, Central South University, Changsha, China
关键词：
I-type granite;Petrogeochemistry;Triassic magmatic rocks;Hf isotope;East Kunlun orogenic belt
摘要：
The Qimantag in the East Kunlun Orogenic Belt has widespread Triassic magmatic rocks that have received scant attention, with an unresolved issue relating to its petrogenesis and geodynamics. In this paper, we used zircon U–Pb–Hf isotopes and whole-rock geochemistry to trace the petrogenesis and tectonic settings of the moyite and monzogranite from the Qimantag Alananshan, East Kunlun. The moyite and monzogranite are silicic (SiO2 ~ 69.9–76.41%), highly alkali (Na2O + K2O ~ 7.29 to 8.96wt.%), with Mg# about 10.4–30.34, indicative of a high-K calc-alkaline rock series. The rare earth element patterns diagram is right-leaning, with a negative Eu anomaly (δEu = 0.31–0.68). They are enriched in Rb, K, and light rare earth elements but depleted in Nb, Ta, and Ti, with abundant amphibole, typical of I-type granites. U–Pb on zircon constrained the emplacement of the moyite at 223.9 ± 2.6Ma and monzogranite at 226.9 ± 2.9Ma. The ΕHf(t) values range from − 2.8 to + 0.1 except for one outlier value of − 7.0, corresponding two-stage model age of 1249–1437Ma. Our combined geochemical and isotopic results indicate that the moyite and monzogranite were derived from partial melting of the lower thicken crust with the contribution from the older basement materials. These rocks formed in a post-collision setting that is transitional between compressive collision and extension orogeny. © 2022, The Author(s), under exclusive licence to Science Press and Institute of Geochemistry, CAS and Springer-Verlag GmbH Germany, part of Springer Nature.
语种：
英文
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Effects of CaO2 based Fenton - like reaction on heavy metals and microbial community during co-composting of straw and sediment
作者：
Chen, Yaoning;Luo, Xinli;Li, Yuanping;Liu, Yihuan;Chen, Li;...
期刊：
Chemosphere ,2022年301:134563 ISSN：0045-6535
通讯作者：
Chen, Yaoning(cyn@hnu.edu.cn);Li, Yuanping(yuanpingli@hncu.edu.cn)
作者机构：
[Chen, Yaoning; Tang, Ping; Liu, Yihuan; Yan, Haoqin; Luo, Xinli; Chen, Li; Jiang, Hongjuan] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Peoples R China.;[Chen, Yaoning; Tang, Ping; Liu, Yihuan; Yan, Haoqin; Luo, Xinli; Chen, Li; Jiang, Hongjuan] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Peoples R China.;[Li, Yuanping] Hunan City Univ, Coll Municipal & Mapping Engn, Yiyang 413000, Hunan, Peoples R China.;[Chen, Yanrong] Hunan Univ Technol & Business, Sch Resource & Environm, Changsha 410205, Peoples R China.;[Qin, Xiaoli] Hunan Acad Forestry, State Key Lab Utilizat Woody Oil Resource, Changsha 410004, Peoples R China.
通讯机构：
[Yaoning Chen; Yuanping Li] C;College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China<&wdkj&>Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, China<&wdkj&>College of Municipal and Mapping Engineering, Hunan City University, Yiyang, Hunan, 413000, China
关键词：
Bacterial community;Calcium peroxide;Composting;Fenton-like system;Heavy metals
摘要：
In this study, a Fenton-like system was constructed by CaO2 and nano-Fe3O4 in the co-composting system of straw and sediment. Its effect on the passivation of heavy metals and the evolution of microbial community were investigated. The results showed that the establishment of CaO2-Fenton-like system increased the residual Cu and residual Zn by 27.62% and 16.80%, respectively. In addition, the CaO2-Fenton-like system facilitated the formation of humic acid (HA) up to 20.84 g·kg−1. Redundancy analysis (RDA) showed that the CaO2-Fenton-like system accelerated bacterial community succession and promoted the passivation of Cu and Zn. Structural equation models (SEMs) indicated that Fenton reaction affected Cu and Zn passivation by affecting pH, bacterial communities, and HA. This study shows that the CaO2-Fenton-like system could promote the application of composting in the remediation of heavy metals contamination in sediment. © 2022 Elsevier Ltd
语种：
英文
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FeS redox power motor for PDS continuous generation of active radicals on efficient degradation and removal of diclofenac: Role of ultrasonic
作者：
Chi, Nianping;Liu, Jiajun;Feng, Li;Guo, Zhicong;Chen, Yuning;...
期刊：
Chemosphere ,2022年300:134574 ISSN：0045-6535
通讯作者：
Feng, Li(fl19860314@126.com)
作者机构：
[Chi, Nianping] Hunan City Univ, Hunan Prov Engn Technol Res Ctr Rural Water Qual, Sch Municipal & Geomat Engn, Yiyang 413000, Hunan, Peoples R China.;[Guo, Zhicong; Chen, Yuning; Feng, Li; Zheng, Huaili; Pan, Tingyu; Liu, Jiajun] Guangdong Univ Technol, Sch Civil & Transportat Engn, Guangzhou 510006, Guangdong, Peoples R China.
通讯机构：
[Li Feng] S;School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, Guangdong, PR China
关键词：
Advanced oxidation;Diclofenac removal;FeS;Free radical;PDS;Ultrasound
摘要：
Diclofenac (DCF), as a typical representative of PPCPs, has potential ecotoxicity to the water environment. In this study, ultrasound (US) enhanced ferrous sulfide (FeS)-activated persulfate (PDS) technology (US/FeS/PDS) was used to degrade DCF. By comparing the degradation effects of US, US/PDS, FeS/PDS and US/FeS/PDS systems on DCF, this study confirmed the synergy and strengthening effects of US. The influences of single-factor experimental conditions on the US/FeS/PDS system were investigated and optimized. The FeS catalysts before and after the reaction were characterized and analyzed by X-ray diffractometer (XRD) and X-ray photoelectron spectroscopy (XPS). The heterogeneous reaction proceeded on the surface of FeS, and a small part of FeS(2) was formed on FeS surface. During the reaction, the proportion of S(2-) on the catalyst surface decreased from 51% to 44%. Correspondingly, the proportion of S(x)(2-) increased from 21% to 26%. It indicated that S(2-) was oxidized into S(x)(2-) in the reaction, and the loss electrons of S(2-) caused the reduction of Fe(3+) to Fe(2+)on the FeS surface, which promoted the cycle between Fe(2+) and Fe(3+) in turn. Furthermore, SO(4)(-) and ‧OH were the main active free radicals, of which the contribution rate of ‧OH was about 34.4%, while that of SO(4)(-) was approximately 52.2%. In US/FeS/PDS, the introduction of US could promote the dissolution of iron on the FeS surface. US contributed to the formation of a redox power motor between S(2-)S(x)(2-) and Fe(2+)-Fe(3+), which continuously decomposed PDS to generate sufficient active SO(4)(-) and ‧OH radicals, thereby efficiently and continuously degrading DCF. Finally, the related mechanism of DCF degradation by US/FeS/PDS was summarized. Overall, US/FeS/PDS can not only efficiently degrade and remove DCF, but also has potential application value in organic pollution removal and wastewater purification.
语种：
英文
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小间距平行顶管管道土压力计算方法研究
作者：
杨仙;肖宇锋;黎永索;陈娟
期刊：
工程科学学报 ,2021年43(10):1376-1384 ISSN：2095-9389
通讯作者：
Chen, Juan(chenjuan@hnust.edu.cn)
作者机构：
[杨仙; 肖宇锋] College of Resources, Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan;411201, China;[黎永索] School of Municipal and Geomatics Engineering, Hunan City University, Yiyang;413000, China;[陈娟] School of Information and Electrical Engineering, Hunan University of Science and Technology, Xiangtan
通讯机构：
[Chen, J.] S;School of Information and Electrical Engineering, China
关键词：
小间距顶管;管-管相互作用;土压力;太沙基土压力理论;极限平衡理论
摘要：
小间距顶管过程中,由于管-管相互作用的影响,使得管周土压力分布与单管顶进土压力分布模式产生差异,从而造成小间距顶管荷载确定、结构计算及顶力估算与控制等设计施工难题.结合数值模拟反分析,基于太沙基土压力理论和极限平衡理论,假设了土体松动线和上部既有顶管的支挡作用线,进一步构建了小间距平行顶管管道拱顶垂直土压力的计算方法.基于构建的土压力计算方法,分析了土体抗剪强度、管径、管间距等对新建顶管拱顶土压力的影响,并与不考虑既有顶管影响的土柱理论和太沙基理论计算值进行了对比.计算结果表明:土体抗剪强度越大,新建顶管拱顶垂直土压力越大,而其侧面的土压力越小;抗剪强度较大时,新构建方法计算拱顶土压力小于太沙基理论计算结果,抗剪强度较小时,新构建方法计算拱顶土压力大于太沙基理论计算结果;顶管埋深增加时,新建顶管拱顶土压力增加,相较于土柱理论和太沙基理论,新构建方法计算的新建顶管拱顶土压力增量最小;随着管间距增加,新建顶管拱顶土压力越来越大.
语种：
中文
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A review of genetic-based evolutionary algorithms in SVM parameters optimization
作者：
Ji, Weizhen;Liu, Deer;Meng, Yifei;Xue, Yun
期刊：
Evolutionary Intelligence ,2021年14(4):1389-1414 ISSN：1864-5909
通讯作者：
Liu, Deer(landserver@163.com)
作者机构：
[Ji, Weizhen; Liu, Deer] School of Architectural and Surveying and Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou;341000, China;[Meng, Yifei] School of Geography and Information Engineering, China University of Geosciences (Wuhan), Wuhan;430074, China;[Xue, Yun] School of Municipal and Surveying Engineering, Hunan City University, Yiyang
通讯机构：
[Deer Liu] S;School of Architectural and Surveying and Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou, China
关键词：
Differential evolution algorithm;Evolutionary algorithms;Genetic algorithm;Global optimization;Immune algorithm;Parameter optimization;Support vector machine
摘要：
Parameters optimization is a research hotspot of SVM and has gained increasing interest from various research fields. Compared with other optimization algorithms, genetic-based evolutionary algorithms that have achieved optimization according to the laws of separation and free combination in genetics are gradually attracted much attention. Also, due to the characteristics of self-organization and self-adaptation, these algorithms often enable SVM to obtain appropriate parameters, so that the model can be applied to more applications. Additionally, many improvements have been proposed in the past two decades in order to allow the optimized SVM model to obtain better performance. This work focuses on reviewing the current state of genetic-based evolutionary algorithms used to optimize parameters of SVM and its variants. First, we introduce the principles of SVM and provide a survey on optimization methods of its parameters. Then we propose a taxonomy of improving genetic-based evolutionary algorithms according to code mechanism, parameters control, population structure, evolutionary strategy, operation mechanism, operators, and many other hybrid approaches. Furthermore, this paper analyzes and compares the advantages and disadvantages of the above algorithms explicitly, and provides their applicable scenarios as well. Finally, we highlight the existing problems of genetic-based evolutionary algorithms used for parameters optimization of SVM and prospect development trends of this field in the future. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
语种：
英文
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Application of optimized GM (1,1) model based on EMD in landslide deformation prediction
作者：
Huang, Changjun* ;Cao, Yuanzhi;Zhou, Lv
期刊：
Computational and Applied Mathematics ,2021年40(8) ISSN：2238-3603
通讯作者：
Huang, Changjun
作者机构：
[Huang, Changjun; Cao, Yuanzhi] Hunan City Univ, Sch Municipal & Surveying Engn, Yiyang 413000, Peoples R China.;[Huang, Changjun] Key Lab Key Technol Digital Urban Rural Spatial P, Yiyang 413000, Peoples R China.;[Zhou, Lv] Guilin Univ Technol, Sch Geomat & Geoinformat, Guilin 541004, Peoples R China.
通讯机构：
[Huang, Changjun] H;[Huang, Changjun] K;Hunan City Univ, Sch Municipal & Surveying Engn, Yiyang 413000, Peoples R China.;Key Lab Key Technol Digital Urban Rural Spatial P, Yiyang 413000, Peoples R China.
关键词：
Deformation;EMD;GM(1;Landslide;Precision evaluation
摘要：
The monitoring data of landslide deformation are characterized by non-smooth, nonlinear and random changes, and the cumulative changes of the monitored objects have both monotonous growth trends and short-term fluctuations. The GM(1,1) model can get better results only when the data series are monotonous. Due to the limitations of the model, the prediction accuracy of the GM(1,1) model is limited to a certain extent. An improved algorithm based on the GM(1,1) model and the empirical mode decomposition (EMD-GM(1,1) model) for deformation prediction was presented to improve the forecast accuracy in this paper. Firstly, EMD was used to effectively separate the nonlinear high-frequency and low-frequency components hidden in the deformation sequence; then the moving average method was applied to build a prediction model for high-frequency component, and the GM(1,1) was applied to build the prediction model for low-frequency one according to the characteristics of each component; finally, the predicted value of each component was superimposed. The experimental results indicate that the optimized EMD-GM(1,1) model combines the advantages of the two models to separate effectively the different frequency components of the deformation sequence, which has higher prediction accuracy. Compared with the conventional GM(1,1) model, DGM(2,1) model and the Linear fitting model, the proposed model could satisfactorily describe the landslide deformation prediction practically. © 2021, SBMAC - Sociedade Brasileira de Matemática Aplicada e Computacional.
语种：
英文
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Hydroxyapatite modified sludge-based biochar for the adsorption of Cu2+ and Cd2+: Adsorption behavior and mechanisms
作者：
Chen, Yaoning* ;Li, Meiling;Li, Yuanping;Liu, Yihuan;Chen, Yanrong;...
期刊：
Bioresource Technology ,2021年321:124413 ISSN：0960-8524
通讯作者：
Chen, Yaoning
作者机构：
[Chen, Yaoning; Chen, Yanrong; Li, Linshenzhang; Li, Meiling; Liu, Yihuan; Xu, Fangting; Jiang, Hongjuan; Chen, Li] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Peoples R China.;[Chen, Yaoning; Chen, Yanrong; Li, Linshenzhang; Li, Meiling; Liu, Yihuan; Xu, Fangting; Jiang, Hongjuan; Chen, Li] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Peoples R China.;[Li, Yuanping] Hunan City Univ, Coll Municipal & Mapping Engn, Yiyang 413000, Hunan, Peoples R China.;[Li, Hui] Hunan Acad Forestry, State Key Lab Utilizat Woody Oil Resource, Changsha 410004, Peoples R China.;[Li, Hui] Hunan Acad Forestry, Inst Biol & Environm Engn, Changsha 410004, Peoples R China.
通讯机构：
[Chen, Yaoning] H;Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Peoples R China.
关键词：
Adsorption behavior;Heavy metals;Hydroxyapatite;Mechanisms;Sludge-based biochar
摘要：
This study prepared sewage sludge, a municipal solid waste, into a biochar modified by hydroxyapatite (HAP) as a new and efficient absorbent (HAP-SSBC) for removal of Cu2+ and Cd2+ from aqueous solution. Adsorption experiment revealed that HAP-SSBC exhibited significantly higher adsorption performance than raw sludge-based biochar (SSBC). At 298.15 K, the maximum adsorption capacity of Cu2+ and Cd2+ via Langmuir model were 89.98 and 114.68 mg/g, respectively. Adsorption kinetic experiment revealed that chemisorption was the main reaction. Analysis of X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy and X-ray photoelectron spectrum (XPS) further confirmed that the main mechanisms were ion exchange with Ca2+, complexion by –OH and –COOH, and forming Cu-π or Cd-π binding with aromatic C[dbnd]C on HAP-SSBC surface. Overall, combing HAP and SSBC to be a new adsorbent is beneficial to the resource utilization of sludge and shows a good prospect for heavy metal removal in aqueous solution. © 2020 Elsevier Ltd
语种：
英文
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Evolution of humic substances and the forms of heavy metals during co-composting of rice straw and sediment with the aid of Fenton-like process
作者：
Chen, Yanrong;Chen, Yaoning;Li, Yuanping;Liu, Yihuan;Li, Hui;...
期刊：
Bioresource Technology ,2021年333:125170 ISSN：0960-8524
通讯作者：
Chen, Yaoning(cyn@hnu.edu.cn)
作者机构：
[Chen, Yanrong; Chen, Yaoning; Tang, Ping; Liu, Yihuan; Yan, Haoqin; Jiang, Hongjuan; Luo, Xinli; Chen, Li] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Peoples R China.;[Chen, Yanrong; Chen, Yaoning; Tang, Ping; Liu, Yihuan; Yan, Haoqin; Jiang, Hongjuan; Luo, Xinli; Chen, Li] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Peoples R China.;[Li, Yuanping] Hunan City Univ, Coll Municipal & Mapping Engn, Yiyang 413000, Hunan, Peoples R China.;[Li, Hui] Hunan Acad Forestry, State Key Lab Utilizat Woody Oil Resource, Changsha 410004, Peoples R China.
通讯机构：
[Yaoning Chen] C;College of Environmental Science and Engineering, Hunan University, Changsha 410082, China<&wdkj&>Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
关键词：
Composting;Fe3O4 nanomaterials;Fenton-like process;Heavy metals;Humic substances
摘要：
The Fenton-like process was established by Fe3O4 nanomaterials (NMs) and Phanerochaete chrysosporium or oxalate, and applied to the co-composting of rice straw and sediment to study its effect on the formation of humic substance and the bioavailability of Cd, Cu, and Pb. Results shown that the application of Fenton-like process significantly promoted the passivation of Cd and Cu, while not shown obvious enhancement for Pb. The decrease of exchangeable fraction Cd (EXC-Cd) and the humic acid (HA) content in pile B with Fe3O4 NMs and oxalate were highest, which were 22.35% and 20.3 g/kg, respectively. Redundancy analyses (RDA) manifested that the Fenton-like process enhanced the influence of humus substance on the bioavailability of Cd, Cu, and Pb. Excitation-emission matrix (EEM) fluorescence spectra analysis suggested that Fenton-like process could obviously enhance the generation of humic substance. This research provides a new perspective and way for composting to remediate heavy metals pollution. © 2021 Elsevier Ltd
语种：
英文
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La(OH)3-modified magnetic CoFe2O4 nanocomposites: A novel adsorbent with highly efficient activity and reusability for phosphate removal
作者：
Chen, Yaoning* ;Xu, Ran;Li, Yuanping* ;Liu, Yihuan;Wu, Yanxin;...
期刊：
Colloids and Surfaces A: Physicochemical and Engineering Aspects ,2020年599:124870 ISSN：0927-7757
通讯作者：
Chen, Yaoning;Li, Yuanping
作者机构：
[Chen, Yaoning; Chen, Yanrong; Peng, Zhen; Chen, Sha; Wang, Sha; Liu, Yihuan; Wu, Yanxin; Zeng, Ziping; Xu, Ran; Yin, Hanshuang] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Chen, Yaoning; Chen, Yanrong; Peng, Zhen; Chen, Sha; Wang, Sha; Liu, Yihuan; Wu, Yanxin; Zeng, Ziping; Xu, Ran; Yin, Hanshuang] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.;[Li, Yuanping] Hunan City Univ, Coll Municipal & Mapping Engn, Yiyang 413000, Hunan, Peoples R China.;[Zhang, Jiachao] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.
通讯机构：
[Chen, Yaoning; Li, Yuanping] H;Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;Hunan City Univ, Coll Municipal & Mapping Engn, Yiyang 413000, Hunan, Peoples R China.
关键词：
Adsorption;Cobalt ferrite;Lanthanum;Magnetic;Phosphate
摘要：
Eutrophication of water bodies caused by excessive phosphate discharge has become a serious environmental issue. In order to develop a easily separable adsorbent to effectively remove phosphate from water, La(OH)3-modified magnetic cobalt ferrite (CoFe2O4) nanocomposites (Lax-CF) were synthesized by coprecipitation assisted hydrothermal method. The La2-CF with the mass ratio of La(OH)3 to CoFe2O4 of 2:1 exhibited the largest adsorption capacity of 104.01 mg P/g and prominent magnetic properties. Batch experiments showed that pseudo second-order model and Langmuir model matched well adsorption kinetic and isotherm, respectively. Moreover, the excellent adsorption performance of La2-CF can be attributed to the following mechanism: (i) protonated and positively charged adsorbent adsorbed the phosphate by electrostatic attraction; (ii) the ligand exchange between the hydroxyl group and the phosphate resulted in the formation of an inner sphere complex, thereby enhancing the adsorption capacity for phosphate. It was worth noting that La2-CF exhibited high stability and optimal adsorption selectivity to phosphate when the competitive anions were added with the pH in the range of 3.0–9.0. Besides, the adsorption efficiency decreased slightly and remained above 80% after 6 cycles, suggesting excellent reusability of this adsorbent. This work provided a remarkable reference for the research of phosphate adsorption materials with high selectivity and stability. © 2020 Elsevier B.V.
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英文
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Modification, application and reaction mechanisms of nano-sized iron sulfide particles for pollutant removal from soil and water: A review
作者：
Chen, Yaoning* ;Liang, Weiyu;Li, Yuanping* ;Wu, Yanxin;Chen, Yanrong;...
期刊：
Chemical Engineering Journal ,2019年362:144-159 ISSN：1385-8947
通讯作者：
Chen, Yaoning;Li, Yuanping
作者机构：
[Chen, YN; Li, Yuanping; Chen, Yaoning; Chen, Yanrong; Liang, Weiyu; Zhao, Li; Wu, Yanxin; Xiao, Wei] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Chen, Yaoning; Chen, Yanrong; Liang, Weiyu; Zhao, Li; Wu, Yanxin; Xiao, Wei] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.;[Li, Yuanping] Hunan City Univ, Coll Municipal & Mapping Engn, Yiyang 413000, Hunan, Peoples R China.;[Zhang, Jiachao] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;[Li, Hui] Hunan Acad Forestry, Inst Biol & Environm Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Chen, YN; Li, YP] H;Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
关键词：
Iron sulfide;Nanoparticles;Soil remediation;Water contamination
摘要：
The presence of excessive pollutants in soil and water caused by the fast development of industry has been a challenge for the innovation of environmental remediation technologies. Nano-sized iron sulfide (FeS) particles have aroused researchers’ attention for environmental remediation over the decade owing to their high reactivity and large specific surface area. The aim of this paper is to provide a comprehensive review on the evolution of FeS nanoparticles for environmental decontamination. The synthesis for bare nano-sized FeS particles via physicochemical and biological methods, the modification for nano-sized FeS particles by coating stabilizers and loading supporting materials are described in this review. What's more, the applications of nano-scale FeS in soil and water remediation are also discussed, including the removal of halogenated hydrocarbon, radionuclide, heavy metals, and metalloid. Meanwhile, the interaction mechanisms, namely adsorption and redox reaction between contaminants and nano-sized FeS and the effect of remediation conditions have been summarized in this review. Moreover, some future research needs are also stated such as researching the fate of FeS nanoparticle after injecting into soil and water, enhancing the mobility of nano-sized FeS in soil and water, and measuring the toxicity to the organisms. © 2019 Elsevier B.V.
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一种基于经验模态分解的永久散射体探测方法
作者：
黄长军;胡纪元;杨亚夫
期刊：
光学学报 ,2019年39(5):363-373 ISSN：0253-2239
作者机构：
[黄长军; 杨亚夫] School of Municipal and Surveying Engineering, Hunan City University, Yiyang;Hunan;413000, China;School of Geosciences and Info-Physics, Central South University, Changsha;410083, China
关键词：
遥感;合成孔径雷达;经验模态分解;永久散射体;噪声相位;概率统计
摘要：
基于经验模态分解(EMD), 提出了一种改进的永久散射体(PS)探测方法。对干涉图进行多尺度分解, 基于梯度的自适应滤波对分解的本征模函数中的噪声进行低信噪比区域强滤波和高信噪比区域弱滤波, 估算滤波后各PS候选(PSC)点的噪声相位。基于各PSC点的幅度和相位稳定性, 对选取的PSC点的相位信息进行分析, 判断其作为PS点的概率, 进而选取可靠的PS点。实验结果表明：与传统的PS点选取方法相比, 所提方法避免了探测过程中PS点的误判和漏判, 准确性更高。
语种：
中文
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Dynamic Vibration Characteristics Monitoring of High-Rise Buildings by Interferometric Real-Aperture Radar Technique: Laboratory and Full-Scale Tests
作者：
Hu, Jiyuan;Guo, Jiming* ;Zhou, Lv;Zhang, Shuai;Chen, Ming;...
期刊：
IEEE Sensors Journal ,2018年18(15):6423-6431 ISSN：1530-437X
通讯作者：
Guo, Jiming
作者机构：
[Zhou, Lv; Hu, Jiyuan; Zhang, Shuai; Guo, Jiming] Wuhan Univ, Sch Geodesy & Geomat, Wuhan 430079, Hubei, Peoples R China.;[Chen, Ming] Natl Geomat Ctr China, Beijing 100830, Peoples R China.;[Hang, Changjun] Hunan City Univ, Sch Municipal & Surveying Engn, Yiyang 413000, Peoples R China.
通讯机构：
[Guo, Jiming] W;Wuhan Univ, Sch Geodesy & Geomat, Wuhan 430079, Hubei, Peoples R China.
关键词：
GB-RAR;static clutter;accuracy validation;SQP-GA;resonance frequencies;high-rise building
摘要：
Dynamic vibration characteristics monitoring of high-rise buildings is of great significance for evaluating their safety operation conditions, verifying structural design parameters and updating numerical models. A ground-based real-aperture radar (RAR) has been applied to a high-rise building in Wuhan, China. In the case of RAR measurements, in which several points in the same range bins can add unexpected multiplicity contributions due to spatial resolution varying with distance, the static clutter effect must be removed. However, only a few studies have analyzed it. In this paper, we introduced the least squares fitting circle method to eliminate the static clutter. On this basis, the accuracy of instrument deformation detection is verified by a precise stepping mobile platform in laboratory. Subsequently, we established a sequential quadratic programming-genetic algorithm (SQP-GA) to identify the dynamic vibration characteristics of buildings under natural environment excitation. The SQP-GA method not only accurately identifies the resonance frequencies, but also directly extracts the amplitudes of sine and cosine components of the building vibration signals under the resonance frequencies response compared with the traditional spectrum analysis based on fast Fourier transform.
语种：
英文
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Investigation of ionospheric scintillation effects on BDS precise point positioning at low-latitude regions
作者：
Luo, Xiaomin;Lou, Yidong* ;Xiao, Qinqin;Gu, Shengfeng;Chen, Biyan;...
期刊：
GPS Solutions ,2018年22(3):1-12 ISSN：1080-5370
通讯作者：
Lou, Yidong
作者机构：
[Luo, Xiaomin; Gu, Shengfeng; Lou, Yidong] Wuhan Univ, GNSS Res Ctr, Luoyu Rd 129, Wuhan 430079, Hubei, Peoples R China.;[Xiao, Qinqin] Hunan City Univ, Sch Municipal & Surveying Engn, Yiyang 413000, Hunan, Peoples R China.;[Chen, Biyan] Cent South Univ, Sch Geosci & Infophys, Changsha 410083, Hunan, Peoples R China.;[Liu, Zhizhao] Hong Kong Polytech Univ, Dept Land Surveying & Geoinformat, 11 Yuk Choi Rd, Kowloon, Hong Kong, Peoples R China.
通讯机构：
[Lou, Yidong] W;Wuhan Univ, GNSS Res Ctr, Luoyu Rd 129, Wuhan 430079, Hubei, Peoples R China.
关键词：
BeiDou Navigation Satellite System (BDS);Ionospheric scintillation;Low-latitude;Precise point positioning (PPP)
摘要：
We present a study on the effects of ionospheric scintillation on BeiDou Navigation Satellite System (BDS) precise point positioning (PPP) at low-latitude regions. The analysis was carried out using BDS data collected by a newly installed ionospheric scintillation monitoring receiver located at Sha Tin of Hong Kong and 15 Hong Kong Satellite Positioning Reference Station Network (SatRef) stations from October 6, 2015, to November 17, 2015. The rate of total electron content index (ROTI) derived from BDS data is shown to be a good indicator in observing the ionospheric scintillation. The analysis indicates that the correlation coefficient between ROTI and S4/σφ is about 0.7. Under scintillation activity, the time series of positioning results for BDS static PPP show a stable variation, but the irregularities are reflected in the time series of code and phase residuals with the maximum values as 7.096 and − 0.469m, respectively. Further, under scintillation condition it is found that positioning results for BDS kinematic PPP vary significantly and the range can reach several meters in the east, north and up directions. The statistical results show that the three-dimensional root-mean-square of BDS PPP is 1.842m under scintillation condition, which is much larger than that for non-scintillation condition as 0.155m. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
语种：
英文
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Adsorption of U(VI) from Aqueous Solution by a Novel Chelating Adsorbent Functionalized with Amine Groups: Equilibrium, Kinetic, and Thermodynamic Studies
作者：
Zhou, Shu-Kui* ;Liu, Ying-Jiu;Jiang, Hai-Yang;Deng, Wen-Jing;Zeng, Guang-Ming
期刊：
ENVIRONMENTAL ENGINEERING SCIENCE ,2018年35(1):53-61 ISSN：1092-8758
通讯作者：
Zhou, Shu-Kui
作者机构：
[Zhou, Shu-Kui; Liu, Ying-Jiu; Deng, Wen-Jing] Univ South China, Sch Civil Engn, Dept Water Sci & Engn, Hengyang 421001, Peoples R China.;[Zhou, Shu-Kui; Zeng, Guang-Ming] Hunan Univ, Sch Environm Sci & Engn, Dept Environm Sci, Changsha, Hunan, Peoples R China.;[Jiang, Hai-Yang] Hunan City Univ, Dept Water Sci & Engn, Coll Municipal & Mapping Engn, Yiyang, Peoples R China.
通讯机构：
[Zhou, Shu-Kui] U;Univ South China, Sch Civil Engn, Dept Water Sci & Engn, Hengyang 421001, Peoples R China.
关键词：
adsorption;amine;kinetics;sawdust;thermodynamics;U(VI)
摘要：
A novel chelating adsorbent, modified sawdust (MS), was synthesized by grafting quaternary ammonium on the cellulose of sawdust, was first designed for high performance U(VI) removal. The property MS was characterized by scanning electron microscopy, energy dispersive X-ray, X-ray diffractometer, and Fourier transform infrared spectroscopy. Removal efficiency of U(VI) for MS and raw sawdust (RS) was evaluated at different dosages, pHs, contact times, and temperatures. Results showed that maximum U(VI) removal efficiencies of 99.7% and 72.8% for MS and RS, respectively, were observed at adsorbent dose of 0.1 g, contact time of 2 h, pH 4.5, and temperature 30°C. Adsorption equilibrium of U(VI) onto MS was well described by the Langmuir isotherm model. Also, the thermodynamic result showed that the adsorption process was feasible, spontaneous, and endothermic in nature. Adsorption kinetic data were fitted well with a pseudo-second order model. High U(VI) removal performance for MS was attributed to the adsorption of U(VI) on amine groups, followed by U(VI) chelation. Results indicate MS has great potential in treating uranium-contaminated water. © Copyright 2018, Mary Ann Liebert, Inc. 2018.
语种：
英文
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Application of Fenton pretreatment on the degradation of rice straw by mixed culture of Phanerochaete chrysosporium and Aspergillus niger
作者：
Chen, Yaoning* ;Chen, Yanrong;Li, Yuanping* ;Wu, Yanxin;Zhu, Fuzao;...
期刊：
Industrial Crops and Products ,2018年112:290-295 ISSN：0926-6690
通讯作者：
Chen, Yaoning;Li, Yuanping
作者机构：
[Chen, YN; Li, Yuanping; Chen, Yaoning; Chen, Yanrong; Zeng, Guangming; Wu, Yanxin; Zhu, Fuzao] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Chen, Yaoning; Chen, Yanrong; Zeng, Guangming; Wu, Yanxin; Zhu, Fuzao] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.;[Li, Yuanping] Hunan City Univ, Coll Municipal & Mapping Engn, Yiyang 413000, Hunan, Peoples R China.;[Zhang, Jiachao] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;[Li, Hui] Hunan Acad Forestry, Inst Biol & Environm Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Chen, YN; Li, YP] H;Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
关键词：
Fenton pretreatment;Lignin;Ligninolytic enzymes;Rice straw
摘要：
The rice straw (RS) is a kind of recalcitrant lignocellulosic material. The Fenton reaction has been widely used for the degradation of organic compounds and toxic chemicals. Therefore, applying it to pretreatment straw seems to have good potential. This study was to investigate the degradation of the pretreated RS by the mixed solid-state culture with Phanerochaete chrysosporium and Aspergillus nigert. The results showed that the degree of delignifition was 15.01% by using an optimized Fenton reagent (6 g/L of FeSO4·7H2O and 15% concentration of H2O2) at a solids loading of 5% (w/v) and a moderate temperature for 15 h. The analysis of the Fenton pretreated RS by Scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FTIR) showed significant changes in physicochemical structure, favoring the subsequently susceptibility of ligninolytic enzymes. The volatile organic compounds collected from the mixed solid-state culture implied the degradation degree of the lignocellulose to some extent. In conclusion, Fenton pretreatment could effectively disrupt the recalcitrant structure of RS and accelerate its biodegradation, which has high potential application in the energy conversion and utilization of lignocellulose. © 2017 Elsevier B.V.
语种：
英文
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Thermodynamic modeling and analysis of a serial composite process for biomass and coal co-gasification
作者：
Xiang, Xianan;Gong, Guangcai* ;Shi, Ying;Cai, Youchan;Wang, Chenhua
期刊：
Renewable & Sustainable Energy Reviews ,2018年82:2768-2778 ISSN：1364-0321
通讯作者：
Gong, Guangcai
作者机构：
[Xiang, Xianan; Gong, Guangcai] Hunan Univ, Sch Civil Engn, Changsha 410082, Hunan, Peoples R China.;[Xiang, Xianan; Shi, Ying] Hunan City Univ, Sch Municipal & Geomat Engn, Yiyang 413000, Peoples R China.;[Wang, Chenhua; Cai, Youchan] Univ South China, Sch Architecture & Construct, Hengyang 421001, Peoples R China.
通讯机构：
[Gong, Guangcai] H;Hunan Univ, Sch Civil Engn, Changsha 410082, Hunan, Peoples R China.
关键词：
Biomass;Coal;Gasification;Serial;Thermodynamic
摘要：
This paper puts forward a new process for the co-gasification of biomass and coal. The process is divided into combustion stage and gasification stage. It provides thermal energy in the combustion stage and produces combustible gases in the gasification stage. The process is named as serial composite process for biomass and coal co-gasification, because of the biomass gasification react after coal gasification react in the gasification stage. A thermodynamic equilibrium model is established for the process. The model is divided into two sub-models, one is the coal combustion sub-model, the other is the coal-biomass serial gasification sub-model. The coal combustion sub-model is divided into two stages including coal pyrolysis and combustion reaction. The coal-biomass serial gasification sub-model is also divided into two stages including coal char gasification reaction and biomass gasification reaction; the temperature of two stages is different; an empirical equation for the temperature relationship is estimated from the experimental data. The model studies the effects of key parameters on gasification properties, including gasification temperature, s/c, coal/biomass, and predicts the composition of product gas, gas yield, gas calorific value and gasification efficiency of the process. Compared with the dual-fluidized bed gasification process, the process is stable, high gas yield, the medium calorific value gas can be produced. It is a new gasification technology worthy to be popularized. © 2017 Elsevier Ltd
语种：
英文
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Comparison and analysis of several wet scrubbing solutions to remove methyl mercaptan
作者：
Zhou, Jun;Jiang, Ying H.* ;Li, Wen H.;Liu, Xiao Y.
期刊：
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING ,2018年53(9):819-824 ISSN：1093-4529
通讯作者：
Jiang, Ying H.
作者机构：
[Zhou, Jun; Liu, Xiao Y.; Jiang, Ying H.; Li, Wen H.] Wuhan Univ Technol, Sch Civil Engn & Architecture, Dept Municipal Engn, 122 Luoshi Rd, Wuhan 430070, Hubei, Peoples R China.;[Zhou, Jun] Hunan City Univ, Sch Municipal & Mapping Engn, Dept Water Sci & Engn, Yiyang, Peoples R China.;[Li, Wen H.] Henan Civil Aviat Dev & Investment Co Ltd, Zhengzhou, Henan, Peoples R China.
通讯机构：
[Jiang, Ying H.] W;Wuhan Univ Technol, Sch Civil Engn & Architecture, Dept Municipal Engn, 122 Luoshi Rd, Wuhan 430070, Hubei, Peoples R China.
关键词：
Ethanol solution;methyl mercaptan;scrubbing tower
摘要：
Wet scrubbing is regarded as an effective method to remove hydrophobic organic odorants. The focus of wet scrubbing is to choose an appropriate scrubbing liquid. In this study, methyl mercaptan (CH<inf>3</inf>SH) was selected as a representative hydrophobic organic odorant for treatment by wet scrubbing using several types of scrubbing solution: ethanol (C<inf>2</inf>H<inf>5</inf>OH), lead acetate ((CH<inf>3</inf>COO)<inf>2</inf>Pb), sodium hypochlorite (NaClO), and sodium hydroxide (NaOH). A comparative analysis of the treatment efficiency, operation cost, and environmental impact was conducted. Results of the technical and economic comparison indicate that the C<inf>2</inf>H<inf>5</inf>OH solution is the best choice of scrubbing solution among those tested. These findings serve as a reference for engineering design and operation for the removal of hydrophobic organic odorants.<br/> ©2018, ©2018 Taylor & Francis Group, LLC.
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