作者： Wang, Xiaohua;Liu, Ni*;Liu, Yunguo*;Jiang, Luhua;Zeng, Guangming;Tan, Xiaofei;Liu, Shaobo;Yin, Zhihong;Tian, Sirong;Li, Jiang

期刊： INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH,2017年14(10) ISSN：1660-4601

通讯作者： Liu, Ni;Liu, Yunguo

作者机构： [Yin, Zhihong; Liu, Yunguo; Jiang, Luhua; Zeng, Guangming; Wang, Xiaohua; Tan, Xiaofei; Li, Jiang; Liu, Ni; Liu, N; Tian, Sirong] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Yin, Zhihong; Liu, Yunguo; Jiang, Luhua; Zeng, Guangming; Wang, Xiaohua; Tan, Xiaofei; Li, Jiang; Liu, Ni; Liu, N; Tian, Sirong] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China.;[Wang, Xiaohua] Hunan City Univ, Sch Architecture & Urban Planning, Yiyang 413099, Peoples R China.;[Liu, Shaobo] Cent S Univ, Sch Architecture & Art, Changsha 410082, Hunan, Peoples R China.;[Liu, Shaobo] Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China.

通讯机构： [Liu, N; Liu, YG] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Liu, N; Liu, YG] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China.

关键词： *17beta-estradiol;*adsorption;*endocrine disrupting chemicals;*pyrolysis temperature;*rice straw biochar

摘要： Rice straw biochar that produced at three pyrolysis temperatures (400, 500 and 600 °C) were used to investigate the adsorption properties of 17β-estradiol (E2). The biochar samples were characterized by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), elemental analysis and BET surface area measurements. The influences of pyrolysis temperature, E2 concentration, pH, ionic strength, background electrolyte and humic acid were studied. Kinetic and isotherm results illustrated that the adsorption process could be well described by pseudo-second-order and Freundlich models. Experimental results showed that ionic strength had less influence on the adsorption of E2 by 500 and 600 °C rice straw biochar. Further, multivalent ions had positive impact on E2 removal than monovalent ions and the influence of the pyrolysis temperature was unremarkable when background electrolyte existed in solutions. The adsorption capacity of E2 decreased with the pH ranged from 3.0 to 12.0 and the humic acid concentration from 2 to 10 mg L-1. Electrostatic attractions and π-π interaction were involved in the adsorption mechanisms. Compared to low-temperature biochar, high-temperature biochar exhibited a better adsorption capacity for E2 in aqueous solution, indicated it had a greater potential for E2 pollution control. © 2017 by the authors. Licensee MDPI, Basel, Switzerland.

语种： 英文

作者： Zhang, Honghui*;Zeng, Yongnian;Jin, Xiaobin;Shu, Bangrong;Zhou, Yinkang;Yang, Xuhong

期刊： Ecological Modelling,2016年320:334-347 ISSN：0304-3800

通讯作者： Zhang, Honghui

作者机构： [Zhou, Yinkang; Zhang, Honghui; Yang, Xuhong; Jin, Xiaobin] Nanjing Univ, Sch Geog & Oceanog Sci, Nanjing 210093, Jiangsu, Peoples R China.;[Zhang, Honghui] Changsha Planning Informat Ctr, Changsha 410013, Hunan, Peoples R China.;[Zhang, Honghui] Hunan City Univ, Sch Architecture & Urban Planning, Yiyang 413002, Hunan, Peoples R China.;[Zeng, Yongnian] Cent S Univ, Sch Geosci & Geomat, Changsha 410083, Peoples R China.;[Shu, Bangrong] Jiangsu Normal Univ, Sch Geodesy & Geomat, Dept Land Resources, Xuzhou 221116, Jiangsu, Peoples R China.

通讯机构： [Zhang, Honghui] Nanjing Univ, Sch Geog & Oceanog Sci, Nanjing 210093, Jiangsu, Peoples R China.

关键词： Land use allocation;Multi-objective optimization;Multi-agent system;Sustainable land use;China

摘要： Achieving multi-objective land use optimization allocation (MOLUOA) for sustainable development is an important issue in land use. In consideration of the multi-dimensional characteristics of MOLUOA in terms of quantity, space, and time, and under the constraints of maximizing economic, ecological, and social benefits of land use, a MOLUOA model is developed in this study by integrating multi-agent system with particle swarm optimization. The MOLUOA model is applied to the simulation of land use optimization allocation in Changsha, a typical city located in central China. Simulation results show that the MOLUOA model can achieve multi-objective land use optimization allocation in terms of quantity, space, and time. The model can provide decision-making support for generating land use alternatives to achieve sustainable land use. (C) 2015 Elsevier B.V. All rights reserved.

语种： 英文

作者： Zeng, Zhi-wei;Tan, Xiao-fei*;Liu, Yun-guo*;Tian, Si-rong;Zeng, Guang-ming;Jiang, Lu-hua;Liu, Shao-bo;Li, Jiang;Liu, Ni;Yin, Zhi-hong

期刊： Frontiers in Chemistry,2018年6(MAR) ISSN：2296-2646

通讯作者： Tan, Xiao-fei;Liu, Yun-guo

作者机构： [Yin, Zhi-hong; Jiang, Lu-hua; Liu, Yun-guo; Zeng, Zhi-wei; Li, Jiang; Tan, Xiao-fei; Tian, Si-rong; Liu, Ni; Zeng, Guang-ming] Hunan Univ, Coll Environm Sci & Engn, Changsha, Hunan, Peoples R China.;[Yin, Zhi-hong; Jiang, Lu-hua; Liu, Yun-guo; Zeng, Zhi-wei; Li, Jiang; Tan, Xiao-fei; Tian, Si-rong; Liu, Ni; Zeng, Guang-ming] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha, Hunan, Peoples R China.;[Zeng, Zhi-wei] Hunan City Univ, Coll Architecture & Urban Planning, Yiyang, Peoples R China.;[Liu, Shao-bo] Cent S Univ, Sch Met & Environm, Changsha, Hunan, Peoples R China.;[Liu, Shao-bo] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn Res, Changsha, Hunan, Peoples R China.

通讯机构： [Tan, XF; Liu, YG] Hunan Univ, Coll Environm Sci & Engn, Changsha, Hunan, Peoples R China.;[Tan, XF; Liu, YG] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha, Hunan, Peoples R China.

关键词： adsorption;antibiotics;biochar;biomass;mechanisms;pyrolytic temperatures

摘要： This paper comparatively investigated the removal efficiency and mechanisms of rice straw biochars prepared under three pyrolytic temperatures for two kinds of tetracycline and quinolone antibiotics (doxycycline and ciprofloxacin). The influencing factors of antibiotic adsorption (including biochar dosage, pH, background electrolytes, humic acid, initial antibiotics concentration, contact time, and temperature) were comprehensively studied. The results suggest that biochars produced at high-temperature [i.e., 700°C (BC700)], have higher adsorption capacity for the two antibiotics than low-temperature (i.e., 300-500°C) biochars (BC300 and BC500). Higher surface area gives rise to greater volume of micropores and mesopores, and higher graphitic surfaces of the BC700 contributed to its higher functionality. The maximum adsorption capacity was found to be in the following order: DOX > CIP. The π-π EDA interaction and hydrogen bonding might be the predominant adsorption mechanisms. Findings in this study highlight the important roles of high-temperature biochars in controlling the contamination of tetracycline and quinolone antibiotics in the environment. © 2018 Zeng, Tan, Liu, Tian, Zeng, Jiang, Liu, Li, Liu and Yin.

语种： 英文

作者： Ning, Qimeng;Yin, Zhihong*;Liu, Yunguo;Tan, Xiaofei;Zeng, Guangming;Jiang, Luhua;Liu, Shaobo;Tian, Sirong;Liu, Ni;Wang, Xiaohua

期刊： INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH,2018年15(10) ISSN：1660-4601

通讯作者： Yin, Zhihong

作者机构： [Yin, Zhihong; Ning, Qimeng; Liu, Yunguo; Zeng, Guangming; Jiang, Luhua; Tan, Xiaofei; Wang, Xiaohua; Liu, Ni; Tian, Sirong] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Yin, Zhihong; Ning, Qimeng; Liu, Yunguo; Zeng, Guangming; Jiang, Luhua; Tan, Xiaofei; Wang, Xiaohua; Liu, Ni; Tian, Sirong] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.;[Ning, Qimeng; Wang, Xiaohua] Hunan City Univ, Sch Architecture & Urban Planning, Yiyang 413000, Peoples R China.;[Liu, Shaobo] Cent S Univ, Sch Architecture & Art, Changsha 410082, Hunan, Peoples R China.;[Liu, Shaobo] Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China.

通讯机构： [Yin, Zhihong] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Yin, Zhihong] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.

关键词： stabilized Fe-Mn binary oxide nanoparticles;oxidation;17 beta-estradiol;adsorption

摘要： Fe–Mn binary oxide nanoparticles (FMBON) were reported to be high performance as adsorbent for pollutants removal from aqueous solution. However, there are still limitations in practice application due to the FMBON tend to aggregate into the micro millimeter level. In order to avoid the agglomeration of nanoparticles, this work synthesized the stabilized Fe–Mn binary oxide nanoparticles (CMC-FMBON) by using water-soluble carboxymethyl celluloses (CMC) as the stabilizer. The characteristics of CMC-FMBON and FMBON were measured by using Transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and Zeta potential. This work systematically investigated the adsorption capacity of CMC-FMBON for 17β-estradiol (E2) and the influences of external environmental factors on E2 removal. The results indicated that CMC-FMBON had much smaller particles, wider dispersion and larger surface area than the FMBON. CMC-FMBON showed better adsorption performance for E2 than FMBON with the maximum adsorption capacity of CMC-FMBON and FMBON were 124.10 and 98.14 mg/g at 298 K, respectively. The experimental data can be well fitted by the model of pseudo-second-order and Langmuir model. The E2 removal by CMC-FMBON was obviously dependent on pH with the maximum adsorption occurring when the pH was acidic. The removal capacity of CMC-FMBON increased when enhancing ionic strength in solution. Background electrolytes promoted slightly E2 adsorption process whereas the presence of humic acid inhibited the E2 removal. π-π interactions, hydrogen bonds, and oxidation might be responsible for E2 removal. This research suggested that the CMC-FMBON has been considered to be a cost-efficient adsorbent for removing E2 from water. © 2018 by the authors. Licensee MDPI, Basel, Switzerland.

语种： 英文

作者： Tang, Yuanqiang;Liu, Yunguo*;Zhang, Tao;Li, Jiang;Wang, Xiaohua;Zhang, Wei;Zeng, Guangming*;Liu, Shaobo;Guan, Lei

期刊： International Journal of Environmental Research and Public Health,2019年16(11) ISSN：1660-4601

通讯作者： Liu, Yunguo;Zeng, Guangming

作者机构： [Liu, Yunguo; Zeng, Guangming; Zeng, GM; Wang, Xiaohua; Tang, Yuanqiang; Zhang, Wei] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Liu, Yunguo; Zeng, Guangming; Zeng, GM; Wang, Xiaohua; Tang, Yuanqiang; Zhang, Wei] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.;[Zhang, Tao] Meijiang Cty Aquat Technol Promot Stn, Meizhou 514000, Peoples R China.;[Liu, Shaobo; Li, Jiang] Cent S Univ, Sch Architecture & Art, Changsha 410082, Hunan, Peoples R China.;[Wang, Xiaohua] Hunan City Univ, Sch Architecture & Urban Planning, Yiyang 413000, Peoples R China.

通讯机构： [Liu, YG; Zeng, GM] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Liu, YG; Zeng, GM] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.

关键词： Anguilla japonica;acute toxic effects;mercury;safety concentration

摘要： The acute toxicity of divalent mercury ion to Anguilla japonica from seawater and freshwater aquaculture was assessed. In particular, the effects of toxicity on the microstructures of the gill and liver tissues were examined using the hydrostatic method, without feeding, at a water temperature of 20 °C. The median lethal concentrations (LC50) of divalent mercury ion to fishes in seawater and freshwater over various durations were: 24 h = 1.637 and 1.428 mg/L; 48 h = 1.562 and 1.377 mg/L; 72 h = 1.530 and 1.284 mg/L; and 96 h = 1.442 and 1.228 mg/L. The safety mass concentrations were 0.1442 and 0.01228 mg/L, respectively. After exposure to divalent mercury ion, adhesion between the gill lamellae and massive cellular disintegration and necrotic shedding were observed in the gill tissue sections. The liver tissues underwent hyperemia and swelling, with the appearance of blood spots, swelling of the hepatocyte mitochondria, dilation of the rough endoplasmic reticulum, and intercellular inflation. © 2019 by the author. Licensee MDPI, Basel, Switzerland.

语种： 英文

作者： Ning, Qimeng;Liu, Yunguo;Liu, Shaobo*;Jiang, Luhua;Zeng, Guangming;Zeng, Zhiwei;Wang, Xiaohua;Li, Jiang*;Kare, Zulhumar

期刊： RSC Advances,2017年:37122-37129 ISSN：2046-2069

通讯作者： Li, Jiang;Liu, Shaobo

作者机构： [Ning, Qimeng; Liu, Yunguo; Jiang, Luhua; Zeng, Guangming; Wang, Xiaohua; Li, Jiang; Zeng, Zhiwei; Kare, Zulhumar] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Ning, Qimeng; Liu, Yunguo; Jiang, Luhua; Zeng, Guangming; Wang, Xiaohua; Li, Jiang; Zeng, Zhiwei; Kare, Zulhumar] Hunan City Univ, Coll Architecture & Urban Planning, Yiyang 413000, Peoples R China.;[Liu, Shaobo] Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China.

通讯机构： [Li, Jiang] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Li, Jiang] Hunan City Univ, Coll Architecture & Urban Planning, Yiyang 413000, Peoples R China.;[Liu, Shaobo] Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China.

摘要： In this work, Fe–Mn binary oxide modified hydrochar (hydrochar-FMBO) was successfully prepared by deposition of Fe–Mn binary oxide (FMBO) nanoparticles on pristine hydrochar. The as-prepared sample was characterized for its physicochemical properties and employed as an adsorbent for 17β-estradiol (E2) removal from water. The characterization results indicated that nano-sized FMBO particles deposited on the hydrochar matrix. For bath experiments, hydrochar-FMBO showed an excellent E2 adsorption capacity (49.77 mg g−1), which was much higher than the known reported-adsorbents. The adsorption kinetic studies demonstrated that the adsorption of E2 on hydrochar-FMBO was well fitted by the pseudo-second-order kinetic model. Besides, adsorption of E2 on hydrochar-FMBO was a rather complex process involving intraparticle diffusion. In addition, the exhausted hydrochar-FMBO could be regenerated and restored to 83% of its initial capacity in the fifth cycle. Relative mechanistic analyses for the adsorption processes were also provided in this article. These results demonstrated that the modified hydrochar could be efficiently utilized as a high-performance sustainable material for organic contaminants removal.

语种： 英文

作者： Sun Qian;Tang Fanghua*;Tang Yong

期刊： Journal of Geographical Sciences,2015年(6):739-755 ISSN：1009-637X

通讯作者： Tang Fanghua

作者机构： [Sun Qian] Cent S Univ, Sch Business, Changsha 410086, Hunan, Peoples R China.;[Sun Qian] Hunan City Univ, Sch Business, Yiyang 413000, Hunan, Peoples R China.;[Tang Fanghua] Hunan City Univ, Sch Architecture & City Planning, Yiyang 413000, Hunan, Peoples R China.;[Tang Yong] Hunan City Univ, Sch Urban Management, Yiyang 413000, Hunan, Peoples R China.

通讯机构： [Tang Fanghua] Hunan City Univ, Sch Architecture & City Planning, Yiyang 413000, Hunan, Peoples R China.

关键词： urban agglomeration;the middle reaches of Changjiang River;economic network;gravitation model;social network analysis

摘要： Due to its great strategic significance in integrating regional coordinated development and enhancing the rise of Central China, urban agglomeration in the middle reaches of Changjiang (Yangtze) River has attracted much attention from both theoretical and practical aspects. Such research into the area’s economic network structure is beneficial for the formation of an urban- and regional-development strategy. This paper constructs an economic tie model based on a modified gravitation model. Subsequently, referring to social network analysis, the paper empirically studies the network density, network centrality, subgroups and structural holes of the middle reaches of Changjiang River’s urban agglomeration economic network. The findings are fourfold: (1) an economic network of urban agglomeration in the middle reaches of Changjiang River has been formed, and economic ties between the cities in this network are comparatively dense; (2) the urban agglomeration in the middle reaches of Changjiang River can be divided into four significant subgroups, with each subgroup having its own obvious economic communications, while there is less economic-behavioral heterogeneity among subgroups — this is especially true for the two subgroups that exist in the Poyang Lake Ecological Economic Zone; (3) an economy pattern driven by the central cities of Wuhan, Changsha and Nanchang has emerged in the urban agglomeration of the middle reaches of Changjiang River, while these three capital cities have exerted great radiation abilities to their surrounding cities, the latter are less able to absorb resources from the former; (4) the Wuhan Metropolitan Areas and the Poyang Lake Ecological Economic Zone have more structural holes than the Ring of Changsha, Zhuzhou and the Xiangtan City Clusters, meaning that cities at the periphery of these two areas are easily constrained by central cities. The Ring of Changsha, Zhuzhou and the Xiangtan City Clusters have fewer structural holes; thus, the cities in this area will not face as many constraints as those in the other two areas.

语种： 英文

作者： Zeng, Zhi-wei;Tian, Si-rong*;Liu, Yun-guo*;Tan, Xiao-fei;Zeng, Guang-ming;Jiang, Lu-hua;Yin, Zhi-hong;Liu, Ni;Liu, Shao-bo;Li, Jiang

期刊： Journal of Chemical Technology & Biotechnology,2018年93(4):1075-1084 ISSN：1097-4660

通讯作者： Tian, Si-rong;Liu, Yun-guo

作者机构： [Yin, Zhi-hong; Jiang, Lu-hua; Liu, Yun-guo; Zeng, Zhi-wei; Li, Jiang; Tian, Si-rong; Tan, Xiao-fei; Liu, Ni; Zeng, Guang-ming] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Yin, Zhi-hong; Jiang, Lu-hua; Liu, Yun-guo; Zeng, Zhi-wei; Li, Jiang; Tian, Si-rong; Tan, Xiao-fei; Liu, Ni; Zeng, Guang-ming] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha, Hunan, Peoples R China.;[Zeng, Zhi-wei] Hunan City Univ, Sch Architecture & Urban Planning, Yiyang, Peoples R China.;[Liu, Shao-bo] Cent S Univ, Sch Met & Environm, Changsha, Hunan, Peoples R China.;[Liu, Shao-bo] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn Res, Changsha, Hunan, Peoples R China.

通讯机构： [Tian, SR; Liu, YG] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.

关键词： adsorption;char;scanning electron microscopy (SEM);removal;pollution control

摘要： BACKGROUND: Antibiotics are widely used for the treatment of bacterial infections in humans and animals, but it can be released into water sources due to incomplete metabolism in humans or via discharge from drug manufacturers. RESULTS: The efficiency of removal of three antibiotics was enhanced with increasing biochar dosage. The adsorption of three antibiotics by RH700 was much higher than by RH300 and RH500, which might be due to the larger surface area and adsorption pore volume of RH700 (211.76 m2 g-1 and 6.25 nm, respectively). In addition, the adsorption capacity was greatly affected by the solution pH, background electrolyte and humic acid. The kinetics experiment data were well fitted by the pseudo-second-order kinetic model. The maximum adsorption capacities of tetracycline hydrochloride (TC), doxycycline hydrochloride (DC) and ciprofloxacin (CF) based on the Langmuir model by RH700 at 318 K were 80.9, 85.2 and 36.1 mg g-1, respectively. RH700 exhibited high affinity for antibiotics, mainly ascribed to the chemical interaction between oxygen-containing functional groups (phenolic hydroxyl group, carboxyl and alkoxy groups) of the biochar surface and TC, DC and CF. CONCLUSION: The rice husk biochar produced at high temperature could be applied as a potential adsorbent for removal of antibiotics from water. © 2017 Society of Chemical Industry. © 2017 Society of Chemical Industry

语种： 英文

作者： Xu, Zhi-Min*;Wang, Zhen;Gao, Qiong;Wang, Li-Li;Chen, Li-Li;Li, Qiao-Guang;Jiang, Jian-Jun;Ye, Han-Jie;Wang, Dong-Sheng;Yang, Ping*

期刊： Journal of environmental management,2019年244:453-461 ISSN：0301-4797

通讯作者： Yang, Ping;Xu, Zhi-Min

作者机构： [Ye, Han-Jie; Wang, Dong-Sheng; Xu, Zhi-Min; Gao, Qiong; Wang, Zhen; Wang, Li-Li; Jiang, Jian-Jun] Jinan Univ, Sch Environm, Key Lab Environm Pollut & Hlth Guangdong Prov, Guangzhou 510632, Guangdong, Peoples R China.;[Xu, Zhi-Min] Jinan Univ, Dept Ecol, Guangzhou 510632, Guangdong, Peoples R China.;[Chen, Li-Li] Hunan City Univ, Sch Architecture & Urban Planning, Yiyang 413000, Peoples R China.;[Li, Qiao-Guang] Zhongkai Univ Agr & Engn, Sch Chem & Chem Engn, Guangzhou 510550, Guangdong, Peoples R China.;[Yang, Ping] Guangdong Inst Microbiol, Guangzhou 510632, Guangdong, Peoples R China.

通讯机构： [Yang, Ping] Guangdong Inst Microbiol, Guangzhou 510632, Guangdong, Peoples R China.;[Xu, Zhi-Min] Jinan Univ, Sch Environm, Guangzhou 510632, Guangdong, Peoples R China.

关键词： Biogas slurry irrigation;Chinese cabbage;Nitrate and heavy metal residue;Nutrient and metal removal by microalgae;Nutritional quality

摘要： Biogas slurry (BS) is a main byproduct of biogas production that is commonly used for agricultural irrigation because of its abundant nutrients and microelements. However, direct application of BS may cause quality decline and nitrate and heavy metal accumulation in crops. To address this issue, a microalgae culture experiment and an irrigation experiment were performed to evaluate the removal efficiencies of nutrients and heavy metals from diluted BS by microalgae Scenedesmus sp. and to investigate the effects of irrigation with microalgae-treated BS (MBS-25, MBS-50, MBS-75, and MBS-100) on nutritional quality, oxidation resistance, and nitrate and heavy metal residues in Chinese cabbage. After 8 days of continuous culture, a ratio of 1/1 for BS/tap water mixture (BS-50) was the optimal proportion for microalgal growth (3.73g dry cell L(-1)) and efficient removal of total nitrogen (86.1%), total phosphorus (94.3%), COD (87.5%), Cr (50%), Pb (60.7%), and Cd (59.7%). The pH in MBS-50 medium recovered to the highest level in a shorter period of time and accelerated the gas stripping of ammonia nitrogen and the formation of insoluble phosphate and metals, which partly contributed to the high removal efficiencies. MBS irrigation significantly promoted crop growth; improved nutritional quality, edible taste, and oxidation resistance; and reduced nitrate and heavy metal residues in Chinese cabbage at a large scale. Therefore, microalgae culture was beneficial to reduce negative impacts of BS irrigation in crop growth and agricultural product safety. This study may provide a theoretical basis for the safe utilization of BS waste in agricultural irrigation.

语种： 英文

作者： 孙倩;汤放华

期刊： 地理研究,2015年(7):1343-1351 ISSN：1000-0585

作者机构： [孙倩; 汤放华] 中南大学商学院,长沙;[孙倩; 汤放华] 410082;[孙倩; 汤放华] 湖南城市学院商学院,益阳;[孙倩; 汤放华] 413002;[孙倩; 汤放华] 湖南城市学院建筑与城市规划学院,益阳

会议名称： 2014年中国人文地理学术年会

会议时间： 2014-10-17

会议地点： 长沙

会议主办单位： 中国地理学会人文地理专业委员会

会议论文集名称： 2014年中国人文地理学术年会论文集

关键词： 空间扩展模型;地理加权回归模型;住房价格;空间异质性

摘要： 鉴于已有研究主要集中探讨住房价格的空间依赖性,较少涉及空间异质性对住房特征价格的影响,也很少尝试构建不同计量模型来比较模型间刻画住房价格影响因素空间分异的准确性,以长沙市中心城区为研究区,采用空间扩展模型和地理加权回归模型比较分析城市住房价格影响因素的空间分异,结果表明:①空间扩展模型和地理加权回归模型都表明,长沙市中心城区的住房属性边际价格随着区位的变化而变化,揭示住房价格影响因素具有显著的空间异质性;小区环境、交通条件、教育配套、生活设施等因素对住房价格的影响强度存在明显的空间分异。②地理加权回归模型和空间扩展模型都能对传统特征价格模型进行改进,但地理加权回归模型在解释能力和精度方面都超过空间扩展模型;对属性系数估计空间模式的分析,地理加权回归模型形成的结果比采用坐标多义扩展的空间扩展模型更为复杂和直观。

语种： 中文

作者： 汤放华;汤慧;孙倩;汤迪莎

期刊： 地理学报,2013年(10):1357-1366 ISSN：0375-5444

通讯作者： Sun, Q.

作者机构： [汤放华] 湖南城市学院建筑与城市规划学院;[汤慧; 汤迪莎] 湖南大学建筑学院;[孙倩] 湖南城市学院商学院

通讯机构： Business School of Hunan City University, China

关键词： 长江中游城市集群;经济网络;引力模型;社会网络分析

摘要： 长江中游城市集群发展对统筹区域协调发展和促进中部崛起具有战略意义,分析长江中游城市集群经济网络结构有助于城市和区域发展战略的制定。本文在改进引力模型的基础上,借助社会网络分析方法(SNA),构建以经济联系强度和经济网络结构特性为核心的城市集群经济网络结构模型,实证分析了长江中游城市集群经济网络的网络密度、网络中心性和凝聚子群,以揭示其经济网络结构特征。研究结果显示:长江中游城市集群整体网络密度处于中高水平,已经形成实际意义上的经济网络;集群内小团体现象明显,一级层面形成了4个凝聚子群,武汉都市圈和湖南环长株潭城市集群两子群内经济联动作用明显,但子群间经济影响较小,尤其是环鄱阳湖生态经济区内的两个凝聚子群,其联系纽带尚有待加强;集群内以武汉、长沙、南昌为主的中心城市驱动周边城市联动发展的格局基本形成,辐射带动作用明显,但吸收能力欠缺。

语种： 中文

作者： 余红兵;肖润林;杨知建;张树楠;刘锋

期刊： 长江流域资源与环境,2014年(5):686-692 ISSN：1004-8227

作者机构： [余红兵] 湖南城市学院建筑与城市规划院;[肖润林; 张树楠; 刘锋] 中国科学院亚热带农业生态研究所;[杨知建] 湖南农业大学农学院

关键词： 生态沟渠;氮;磷;输出特征

摘要： 为了研究长沙县金井河流域农业源头生态沟渠氮和磷的输出特征,对灌溉和降雨条件下及不同季节生态沟渠水体氮、磷的变化特征进行监测研究。研究结果表明:灌溉和降雨期间,生态沟渠中总氮的输出最大值为2.70mg/L,其输出的主要形态为氨态氮和硝态氮,总磷的最大值达0.32mg/L。灌溉后,生态沟渠氮、磷的输出均呈单调递减变化,在灌溉初期均最高。降雨后,总氮、总磷沿程变化趋势均呈递减变化;生态沟渠对水体总氮、总磷去除率分别达64%、70%;各断面氮、磷的输出随着时间的增加呈先增加后降低的趋势,其中总氮、氨态氮含量在雨后第3d达到最高,总磷含量在雨后第2d达到最高。在不同季节中水体氮、磷的变化以冬季总氮、氨态氮和磷浓度最高。

语种： 中文

作者： 李秋莲

期刊： 求索,2010年(8):84-85 ISSN：1001-490X

作者机构： [李秋莲] 湖南城市学院建筑与规划学院;湖南

关键词： 廉租房建设;国外经验;路径取向;制度规范

摘要： 廉租房建设是推动社会和谐发展、兼顾效率与公平的具体措施之一。本文借鉴廉租房建设制度完善国家经验,结合我国国情,对构建我国廉租房建设的供给模式与规范建设制度,提出了创新的观点,对推动廉租房健康发展具有重要参考价值。

语种： 中文

作者： Wen, Tong*

作者机构： [Wen, Tong] Hunan City Univ, Sch Architecture & Planning, Yiyang 413000, Hunan, Peoples R China.

会议名称： International Conference on Civil, Architectural and Hydraulic Engineering (ICCAHE 2012)

会议时间： AUG 10-12, 2012

会议地点： Zhangjiajie, PEOPLES R CHINA

会议主办单位： Hunan City Univ, Sch Architecture & Planning, Yiyang 413000, Hunan, Peoples R China.

会议论文集名称： Applied Mechanics and Materials

关键词： General public transportation;Service level;Evaluation index;Group decision

摘要： The group eigenvalue method and fuzzy mathematics knowledge is used to assess the comprehensive evaluation of the service level for bus traffic. Analyzing the factors that influence the service level of bus traffic, it puts forward the evaluation index system of service level. In order to evaluate the service level for bus traffic, on the basis of defining remark grade, used the group eigenvalue method to decide the index weight. Then, the scientific and rationality of the evaluation method was detected by application example, according to the evaluation result, carried on the corresponding analysis. ©(2012) Trans Tech Publications, Switzerland.

语种： 英文

作者： 余红兵;王仁才;肖润林;杨知建

期刊： 湖南农业大学学报. 自然科学版,2007年(3):341-344 ISSN：1007-1032

作者机构： 湖南城市学院,建筑与城市规划院,湖南,益阳,413000;湖南农业大学,园艺园林学院,湖南,长沙,410128;中国科学院,亚热带农业生态研究所,湖南,长沙,410125;[余红兵] 湖南城市学院;[王仁才; 杨知建] 湖南农业大学

关键词： 柑橘叶片;土壤;环境移民示范区;桂西北

摘要： 分析、测定了桂西北环境移民示范区126片柑橘园的植株叶片和土壤的矿质元素含量.结果表明,柑橘园植株叶片营养状况整体较好,柑橘叶片N,P,Mg,Ca,Fe,Mn等元素含量适宜,K含量严重缺乏,Cu,Zn含量不同程度缺乏.柑橘园土壤存在酸性过强、有效Fe含量较高、交换性盐基(Ca,Mg,K)含量严重偏低的问题;土壤有机质,速效P,水解N含量适宜,而有效Cu,Zn含量缺乏.探讨了柑橘叶片矿质元素含量与土壤养分含量的相关性.结果表明,叶片营养元素的质量分数与土壤相应养分的质量分数很少存在显著相关,而叶片K,P,Ca,Fe,Mn,zn质量分数与土壤多种养分质量分数间存在一定的相关性,表明土壤养分与叶片元素含量间关系的复杂性.土壤P与叶片P含量呈负相关,表明在生产中应讲究P肥施用,也表明土壤分析与叶片分析在营养诊断中具有互补作用.

语种： 中文

作者： 周小梅;赵运林;胥正钢;董萌;库文珍

期刊： 环境工程学报,2014年(11):5010-5014 ISSN：1673-9108

通讯作者： Zhao, Y.

作者机构： [周小梅; 赵运林] 湖南城市学院建筑与城市规划学院;[胥正钢] 湖南农业大学生物安全科学技术学院;[董萌; 库文珍] 湖南城市学院化学与环境工程学院

通讯机构： College of Architecture and Urban Planning, Hunan City University, Yiyang, China

关键词： 蒌蒿;耐镉产酸;根际细菌;筛选;鉴定

摘要： 根际细菌的筛选研究有助于构建有效的植物-微生物联合修复体系。采用稀释平板法从蒌蒿根际土壤中分离耐Cd产酸的根际细菌,并对菌株Pb~(2+)、Cu~(2+)和Sb~(3+)的耐受性,分泌吲哚乙酸(IAA)、铁载体、解磷特性及对土壤中Cd的活化效果进行了测定,基于形态特性、生理生化测定和16S rDNA 序列分析对目标菌株进行了分类鉴定。结果表明,从蒌蒿根际土壤中分离到能耐50 mg/L镉浓度且产酸能力较强的根际细菌1株T_3,菌株T_3对Pb~(2+)、Cu~(2+)和Sb~(3+)均具一定的耐受性,能分泌一定量的IAA和铁载体,但不具解磷特性,能明显增加土壤中有效态镉的含量,经鉴定可初步确定为芽孢杆菌属(Bacillus sp.)。为进一步研究其在蒌蒿修复镉污染土壤中的作用奠定了基础。

语种： 中文

作者： Yongbo Liu

期刊： International Journal of Applied Decision Sciences,2017年10(4):335-346 ISSN：1755-8077

通讯作者： Liu, Yongbo(12141527@qq.com)

作者机构： [Yongbo Liu] School of Urban Management, Hunan City University, Yiyang, Hunan, 413000, China

通讯机构： School of Urban Management, Hunan City University, Yiyang, Hunan, China

关键词： commercial real estate;cost evaluation;grey correlation theory;bacterial chemotaxis particle swarm optimisation;BCPSO;artificial neural networks.

摘要： Aimed at coping with the complexity of commercial real estate price evaluation, the advantages of grey correlation theory, bacterial chemotaxis particle swarm algorithm and BP neural network are integrated to firstly put forward a novel model of commercial real estate cost evaluation. First, grey correlation theory was used to reduce the factors affecting commercial real estate price and optimise input variables of BP neural network. Then, the bacterial chemotaxis particle swarm algorithm with constriction factors is adopted to optimise the initial weights and thresholds. Through this method, BP neural network can be used to solve nonlinear problems and to improve the rate of convergence and the ability to search global optimum. An engineering project in the city of Hunan is selected to make empirical analysis. It shows that this novel model enjoys a high practical value as it can be applied to make scientific evaluation of commercial real estate price evaluation. ©Copyright 2017 Inderscience Enterprises Ltd.

语种： 英文

作者： 张伟;施周;徐舜开;张骅

期刊： 湖南大学学报. 自然科学版,2009年36(12): 69-73 ISSN：1674-2974

通讯作者： Shi, Z.(zhous61@163.com)

作者机构： [施周; 张骅; 张伟; 徐舜开] College of Civil Engineering, Hunan Univ, Changsha, Hunan 410082, China;[张伟] Dept of Urban Construction, Hunan City Univ, Yiyang, Hunan 413000, China;[施周; 张骅; 张伟; 徐舜开] Key Laboratory of Building Safety and Energy Efficiency of the Ministry of Education, Hunan Univ, Changsha, Hunan 410082, China

通讯机构： College of Civil Engineering, Hunan Univ, China

关键词： 碳纳米管;1,2,3-三氯苯;吸附;动力学;热力学;吸附等温线

摘要： 采用3种不同直径的多壁碳纳米管(MWNTs)对1,2,3 - 三氯苯(TCB)进行吸附实验.结果表明,随MWNTs直径减小,1,2,3 - 三氯苯吸附量增加.实验中发现MWNT(L-8)对TCB的吸附仅需150 min就能基本达到平衡,且最大吸附量达77.5 mg/g;其吸附动力学和热力学过程可分别用假二级反应动力学模型和Freundlich吸附等温线模型来描述.在278 K±1 K,288 K±1 K和298 K±1 K下进行的MWNT(L-8)吸附热力学实验所得到的如平衡常数(K~0)、吉布斯自由能(ΔG~0)、标准焓变(ΔH~0)、熵变(ΔS~0)等热力学参数表明,MWNTs吸附TCB过程为自发吸热反应.当pH值在2～11之间变化时,吸附量基本不变,表明H键对MWNTs吸附TCB过程无显著影响,MWNTs对TCB的强吸附作用可能是MWNTs表面存在的π电子与TCB苯环中的π电子形成π电子对的作用结果.

语种： 中文

作者： 张强

期刊： 求索,2012年(8):78-79,103 ISSN：1001-490X

作者机构： [张强] 湖南城市学院建筑与城市规划学院

关键词： 模糊评判;历史文化名村;张谷英村;保护策略

摘要： 采用模糊评判的方法对历史文化名村进行评价,研究历史文化名村的多层次性和模糊性,定性分析与定量分析有效结合,可以提高历史文化名村综合评判的可靠性和准确性。本文就以张谷英村为例,主要从张谷英村的资源价值评价、发展现状以及旅游开发等几个方面来进行论述,并给出关于张谷英村的相关保护策略。

语种： 中文

作者： 张伟;施周;张茜;徐舜开;张骅

期刊： 湖南大学学报. 自然科学版,2012年39(1):71-76 ISSN：1674-2974

通讯作者： Shi, Z.(zhous61@163.com)

作者机构： [施周; 张骅; 张伟; 张茜; 徐舜开] College of Civil Engineering, Hunan Univ., Changsha, Hunan 410082, China;[张伟] Dept. of Urban Construction, Hunan City Univ., Yiyang, Hunan 413000, China;[施周; 张骅; 张伟; 张茜; 徐舜开] Key Laboratory of Building Safety and Energy Efficiency, Ministry of Education, Hunan Univ., Changsha, Hunan 410082, China

通讯机构： College of Civil Engineering, Hunan Univ., China

关键词： 复合光催化剂;1,2,3-三氯苯;吸附;光降解;协同作用

摘要： 以典型氯苯类有机化合物1,2,3-三氯苯(1,2,3-TCB)为目标去除物,研究复合光催化剂MWNTs/TiO_2(多壁碳纳米管负载二氧化钛)对其吸附与光催化降解协同作用.结果表明,在不同温度、pH值、复合光催化剂投加量、紫外光光强等影响因素作用条件下,MWNTs对1,2,3-TCB的吸附去除率与纳米TiO_2对1,2,3-TCB的光催化降解去除率的叠加理论计算值曲线均在MWNTs/TiO_2对1,2,3-TCB吸附与光催化降解共同作用曲线的下方,充分体现了MWNTs/TiO_2对1,2,3-TCB的吸附与光降解初始阶段的协同作用.溶液中温度或pH值降低,有利于复合光催化剂对1,2,3-TCB的去除;复合光催化剂投加量增多或紫外光光强增大将提高复合光催化剂对1,2,3-TCB的去除率.

语种： 中文