作者机构：
[Ning Liu; Yi Li; Yiwen Hu] College of Meteorology and Oceanography, National University of Defense Technology, Changsha, 410003, China;High Impact Weather Key Laboratory of CMA, Changsha, 410003, China;[Xin Fang] School of Municipal and Geomatics Engineering, Hunan City University, Yiyang, 413000, China;National Research Council of Italy, Institute of Methodologies for Environmental Analysis (IMAA), Contrada S. Loja snc, 85050, Tito Scalo, PZ, Italy;CommSensLab, Dept. of Signal Theory and Communications, UPC, 08034, Barcelona, Spain
通讯机构：
[Yi Li] C;College of Meteorology and Oceanography, National University of Defense Technology, Changsha, 410003, China
摘要：
Satellite-based aerosol optical depth (AOD) products are commonly used in various aerosol-related studies, such as aerosol pollution mapping and aerosol-climate interactions. However, these satellite AOD products often suffer from significant missing gaps due to cloud cover and limitations in the retrieval algorithm. To address this issue, some studies take advantage of real-time seamless simulation of numerical models and successfully fill in these gaps by establishing a regression relationship between satellite AOD and numerical model AOD. However, these previous studies usually use satellite AOD retrievals as the regression target, which limits the accuracy of the imputation results by the original accuracy of satellite AOD retrievals and also consumes a considerable amount of time. To overcome these limitations, this study proposes a spatiotemporal imputation model called Bi-ConvRNN, which combines convolutional neural networks (CNN) and bidirectional recurrent neural networks (Bi-RNN). The model takes both satellite AOD retrievals and numerical model AOD data as input and utilizes the weighted mean squared error (MSE) loss function of multiple AOD datasets, e.g., ground-based data, satellite retrievals, and numerical simulation, as the optimization target to improve the imputation accuracy. The proposed model is evaluated using hourly COMS GOCI AOD products. In the independent test set, the AOD results generated by the Bi-ConvRNN model in the region containing GOCI AOD retrievals can break the accuracy of original GOCI AOD products with the accuracy improved from R2 = 0.70 [RMSE = 0.15] to R2 = 0.84 [RMSE = 0.11], and the filling accuracy, e.g. R2 = 0.79, [RMSE = 0.14], in the region without GOCI AOD retrievals are still better than those of the original GOCI AOD retrievals. Additionally, the Bi-ConvRNN model demonstrates satisfactory filling efficiency, requiring only 0.12 s to fill in the missing gaps of hourly GOCI AOD products per day. These results highlight the efficiency and reliability of the proposed model in filling the gaps in satellite AOD products, and the filled AOD results have great potential for further aerosol-related research.
期刊：
Science of The Total Environment,2024年920:170803 ISSN：0048-9697
通讯作者：
Chen, Yaoning;Li, Yuanping
作者机构：
[Zhao, Mengyang; Zhou, Wencheng; Zhao, Chen; Liu, Yihuan; Kang, Huayue; Chen, Li; Jiang, Hongjuan] College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China;[Chen, Yaoning] College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China. Electronic address: cyn@hnu.edu.cn;[Li, Yuanping] School of Municipal and Geomatics Engineering, Hunan City University, Yiyang 413000, China. Electronic address: yuanpingli@hncu.edu.cn;[Li, Hui] State Key Laboratory of Utilization of Woody Oil Resource and Institute of Biological and Environmental Engineering, Hunan Academy of Forestry, Changsha 410004, China
通讯机构：
[Chen, Yaoning] C;[Li, Yuanping] S;College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China. Electronic address:;School of Municipal and Geomatics Engineering, Hunan City University, Yiyang 413000, China. Electronic address:
摘要：
Novel tourmaline-biochar composites (TBs) were synthesized by introducing tourmaline (TM) into pomelo peel biochar (BC). The surface properties of TBs and BC were studied and the adsorption performances for Pb(2+) were investigated. Compared to pristine BC, the adsorption ability for Pb(2+) on TBs was enhanced with the increase of TM in TBs, and up to 514.62mg/g on 5%TB. The enrichment of inorganic metals caused by TM in TBs made the precipitation and cation ion exchange become the main mechanisms in adsorbing Pb(2+), and the amounts of adsorbing Pb(2+) by those two mechanisms on TBs were 1.10-1.48 times and 1.20-1.30 times those of BC, respectively. Furthermore, applying TBs to practical contaminated soil increased the soil pH and electrical conductivity (EC) after 15days of incubation. The increased content of residual-Pb and reduced exchangeable-Pb and DTPA-Pb indicated that TBs were favorable for the immobilization of Pb in soil. This study gives a new perspective on the synthesis of tourmaline-biochar composite and their application in Pb-polluted water and soil.
摘要：
Purpose Co-composting with agriculture waste and sediment is an effective method to passivate the heavy metal content of sediment, but it is still unclear whether this passivation will be effective in the long term, and the contribution of different components of humic substances (HS) to the passivation of heavy metals has not been investigated quantitatively.Methods A 256-day composting experiment was conducted in 165 L reactors. Sediment, vegetables, rice straw, and bran were used as raw materials. Two experiments were set up, with pile A as control and pile B inoculated with Phanerochaete chrysosporium.Results The results revealed that the residual fraction of Cd (Res-Cd) increased by 24.22% and 27.04% in pile A and pile B, respectively. During the first 60 days of composting, the contents of humic acids-bound Cd (HA-Cd) both increased in two piles and accounted for 16.54% and 17.69% of the total content of Cd (T-Cd) in pile A and pile B, respectively. The correlation analysis suggested that the Res-Cd exhibited a significantly positive correlation with humic acid (HA) (P < 0.01) and HA-Cd, but a negative correlation with fulvic acid (FA) in both piles. Fourier-transform infrared spectroscopy and excitation-emission matrix fluorescence spectroscopy analysis demonstrated that the inoculation could enhance the chelating capability of HA to Cd and improve the maturity of compost.Conclusions This study has demonstrated that composting had a persistent passivation on Cd for 256 days. The contribution of HS to Cd passivation largely depends on the amount of HA-Cd rather than FA-Cd. Moreover, the inoculation of Phanerochaete chrysosporium could enhance the binding ability of HA to Cd and improve the maturity of compost.
期刊：
Science of The Total Environment,2024年924:171600 ISSN：0048-9697
通讯作者：
Chen, Yaoning;Li, Yuanping
作者机构：
[Chen, Yaoning] College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China. Electronic address: cyn@hnu.edu.cn;[Yuan, Yu; Wang, Qianruyu; Luo, Mengwei; Wang, Jun; Chen, Li; Jiang, Hongjuan] College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China;[Li, Yuanping] School of Municipal and Geomatics Engineering, Hunan City University, Yiyang, Hunan 413000, China. Electronic address: yuanpingli@hncu.edu.cn;[Li, Hui] State Key Laboratory of Utilization of Woody Oil Resource and Institute of Biological and Environmental Engineering, Hunan Academy of Forestry, Changsha 410004, China;[Chen, Yanrong] School of Resource & Environment, Hunan University of Technology and Business, Changsha 410205, China
通讯机构：
[Chen, Yaoning] C;[Li, Yuanping] S;College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China. Electronic address:;School of Municipal and Geomatics Engineering, Hunan City University, Yiyang, Hunan 413000, China. Electronic address:
摘要：
The electric field-assisted composting system (EACS) is an emerging technology that can enhance composting efficiency, but little attention has been given to electrode materials. Herein, an EACS was established to investigate the effects of electrode materials on humic substance formation and heavy metal speciation. Excitation-emission matrix analysis showed that carbon-felt and stainless-steel electrodes increased humic acid (HA) by 48.57% and 47.53%, respectively. In the EACS with the carbon-felt electrode, the bioavailability factors (BF) of Cu and Cr decreased by 18.00% and 7.61%, respectively. Despite that the stainless-steel electrodes decreased the BF of As by 11.26%, the leaching of Cr, Ni, Cu, and Fe from the electrode itself is an inevitable concern. Microbial community analyses indicated that the electric field increased the abundance of Actinobacteria and stimulated the multiplication of heavy metal-tolerant bacteria. Redundancy analysis indicates that OM, pH, and current significantly affect the evolution of heavy metal speciation in the EACS. This study first evaluated the metal leaching risk of stainless-steel electrode, and confirmed that carbon-felt electrode is environment-friendly material with high performance and low risk in future research with EACS.
通讯机构：
[Yaoning Chen; Yuanping Li] C;College of Municipal and Mapping Engineering, Hunan City University, Yiyang, Hunan 413000, China<&wdkj&>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
摘要：
Humic substances (HSs) are key indicators of compost maturity and are important for the composting process. The application of additives is generally considered to be an efficient and easy-to-master strategy to promote the humification of composting and quickly caught the interest of researchers. This review summarizes the recent literature on humification promotion by additives in the composting process. Firstly, the organic, inorganic, biological, and compound additives are introduced emphatically, and the effects and mechanisms of various additives on composting humification are systematically discussed. Inorganic, organic, biological, and compound additives can promote 5.58-82.19%, 30.61-50.92%, 2.3-40%, and 28.09-104.51% of humification during composting, respectively. Subsequently, the advantages and disadvantages of various additives in promoting composting humification are discussed and indicated that compound additives are the most promising method in promoting composting humification. Finally, future research on humification promotion is also proposed such as long-term stability, environmental impact, and economic feasibility of additive in the large-scale application of composting. It is aiming to provide a reference for future research and the application of additives in composting.
作者机构：
[Sheng, Haiquan; Zhou, Lv; Chen, Yukai; Xian, Lingxiao; Ma, Shubian] Guilin Univ Technol, Coll Geomatics & Geoinformat, Guilin 541004, Peoples R China.;[Huang, Changjun] Hunan City Univ, Sch Municipal & Surveying Engn, Yiyang 413000, Peoples R China.;[Yang, Fei] China Univ Min & Technol Beijing, Geosci & Survey Engn Coll, Beijing 100083, Peoples R China.
通讯机构：
[Lv Zhou] C;College of Geomatics and Geoinformation, Guilin University of Technology, Guilin 541004, China<&wdkj&>Author to whom correspondence should be addressed.
关键词：
InSAR;persistent scatterer;Beijing;plain;Sentinel-1A;time series
摘要：
Surface subsidence is a serious threat to human life, buildings and traffic in Beijing. Surface subsidence is closely related to human activities, and human activities in Beijing area showed a decreasing trend during the Corona Virus Disease 2019 (COVID-19). To study surface subsidence in Beijing before and after the COVID-19 outbreak and its causes, a total of 51 Sentinel-1A SAR images covering Beijing from January 2018 to April 2022 were selected to derive subsidence information by Time Series Interferometry Synthetic Aperture Radar (TS-InSAR). The results of surface subsidence in Beijing demonstrate that Changping, Chaoyang, Tongzhou and Daxing Districts exhibited the most serious subsidence phenomenon before the COVID-19 outbreak. The four main subsidence areas form an anti-Beijing Bay that surrounds other important urban areas. The maximum subsidence rate reached −57.0 mm/year. After the COVID-19 outbreak, the main subsidence area was separated into three giant subsidence funnels and several small subsidence funnels. During this period, the maximum subsidence rate was reduced to −43.0 mm/year. Human activity decrease with the COVID-19 outbreak. This study effectively analysed the influence of natural factors on surface subsidence after excluding most of the human factors. The following conclusions are obtained from the analysis: (1) Groundwater level changes, Beijing’s geological structure and infrastructure construction are the main reasons for surface subsidence in Beijing. (2) Seasonal changes in rainfall and temperature indirectly affect groundwater level changes, thereby affecting surface subsidence in the area. (3) The COVID-19 outbreak in early 2020 reduced the payload of Beijing’s transportation facilities. It also slowed down the progress of various infrastructure construction projects in Beijing. These scenarios affected the pressure on the soft land base in Beijing and reduced the surface subsidence trend to some extent.
作者机构：
[Deng, Yumei; Deng, Jie; Zhang, Chun] Hunan City Univ, Sch Municipal & Mapping Engn, Yiyang 413000, Peoples R China.
通讯机构：
[Chun Zhang] S;School of Municipal and Mapping Engineering, Hunan City University, Yiyang 413000, China<&wdkj&>Author to whom correspondence should be addressed.
关键词：
sponge city;waterlogging;water environment;sustainable development
摘要：
Urban waterlogging and urban water environment problems in Changde city caused by extreme weather have seriously hindered the sustainable development of cities. A sponge city not only involves the inheritance and development of foreign technology but also a new method for its use. The background of sponge city construction based on green infrastructures in China was introduced in this study. As one of the first pilot construction cities based on the sponge concept, Changde city possesses natural geographical advantages. The current urban situation, rainfall type and water environment in the sponge construction area were analyzed and the causes of urban waterlogging and deterioration of urban inland river water quality are presented. Based on the urban water environment and ecological status, the specific strategic objectives of the sponge city transformation are given. Meanwhile, the overall technical route and the concrete realization path of each index, such as the water environmental system, water ecological system and security system, are also presented. The annual net flow total control rate and the runoff pollution reduction reached 77.56% and 45.18%, respectively. The total runoff and peak flow were also reduced by 35.08% and 26.82%, respectively. Meanwhile, the peak flow of runoff pollution concentration was reduced by 31.99%. The pollutant load reduction rate of non-point source pollution in the area reached more than 45%. The project not only alleviated the problems of urban waterlogging and black and odorous water bodies but also ensured the sustainable development of the urban water environment.
摘要：
Sediment is the internal and external source of water environment pollution, so sediment remediation is the premise of water body purification. Sediment microbial fuel cell (SMFC) can remove the organic pollutants in sediment by electroactive microorganisms, compete with methanogens for electrons, and realize resource recycling, methane emission inhibiting and energy recovering. Due to these characteristics, SMFC have attracted wide attention for sediment remediation. In this paper, we comprehensively summarized the recent advances of SMFC in the following areas: (1) The advantages and disadvantages of current applied sediment remediation technologies; (2) The basic principles and influencing factors of SMFC; (3) The application of SMFC for pollutant removal, phosphorus transformation and remote monitoring and power supply; (4) Enhancement strategies for SMFC in sediments remediation such as SMFC coupled with constructed wetland, aquatic plant and iron-based reaction. Finally, we have summarized the drawback of SMFC and discuss the future development directions of applying SMFC for sediment bioremediation.
摘要：
The heterogeneous Fenton-like systems induced by Fe-containing minerals have been largely applied for the degradation of organic pollutants. However, few studies have been conducted on biochar (BC) as an additive to Fenton-like systems mediated by iron-containing minerals. In this study, the addition of BC prepared at different temperatures was found to significantly enhance the degradation of contaminants in the tourmaline-mediated Fenton-like system (TM/H(2)O(2)) using Rhodamine B (RhB) as the target contaminant. Furthermore, the hydrochloric acid-modified BC prepared at 700°C (BC700(HCl)) could achieve complete degradation of high concentrations of RhB in the BC700(HCl)/TM/H(2)O(2) system. Free radical quenching experiments showed that TM/H(2)O(2) system removed contaminants mainly mediated by the free radical pathway. After adding BC, the removal of contaminants is mainly mediated by the non-free radical pathway in BC700(HCl)/TM/H(2)O(2) system which was confirmed by the Electron paramagnetic resonance (EPR) experiments and electrochemical impedance spectroscopy (EIS). In addition, BC700(HCl) had broad feasibility in the degradation of other organic pollutants (Methylene Blue (MB) 100%, Methyl Orange (MO) 100%, and tetracycline (TC) 91.47%) in the tourmaline-mediated Fenton-like system. Possible pathways for the degradation of RhB by the BC700(HCl)/TM/H(2)O(2) system were also proposed.
期刊：
FRONTIERS IN EARTH SCIENCE,2023年11:1112772 ISSN：2296-6463
通讯作者：
Gao, H.
作者机构：
[Li, Ping] Tibet Agr & Anim Husb Univ, Coll Resources & Environm, Linzhi, Peoples R China.;[Gao, Hongshan; Yan, Tianqi] Lanzhou Univ, Coll Earth & Environm Sci, Key Lab Western Chinas Environm Syst, Minist Educ, Lanzhou, Peoples R China.;[Li, Zongmeng] Xinyang Normal Univ, Sch Geog Sci, Xinyang, Peoples R China.;[Wu, Yajie] Wuwei 1 Middle Sch, Wuwei, Peoples R China.;[Liu, Fenliang] Hunan City Univ, Sch Municipal & Surveying Engn, Yiyang, Peoples R China.
通讯机构：
[Gao, H.] K;Key Laboratory of Western China’s Environmental Systems (Ministry of Education), China
关键词：
downstream fining;gravel-sand transition;median grain size;river sediment;Shiyang River
摘要：
The grain size composition and distribution of river sediments are important for understanding regional geomorphological evolution, source-sink processes and drainage ecology. The Shiyang River basin, an inland river system in northwestern China, provides an environmental context within which to investigate the relationship between sediment particle size and environmental factors. Based on the analysis of the grain size characteristics of modern riverbed sediments, basin geomorphological parameters and lithology, it is found that the median grain size (Md) of river sediments shows a decrease trend from upstream to downstream in the basin. One of the tributaries named the Jinta River shows an obvious downstream fining trend (exponentially decreasing) of Md, which is related to the old geomorphological development stages and relatively homogeneous lithology in the basin. The downstream fining trend of Md along the Xiying River, another tributary, shows complex fluctuations, which might be affected by the tectonically active, young geomorphic development stage, complex lithology of the basin, and the sediment confluence of tributaries. The gravel-sand transition zone occurs in the plain section of the river about 28 km out of the mountain, which is related to the combination of regional geomorphological features, river morphology and hydraulic sorting.
摘要：
本文提出了一种基于㶲分析的层次分析-模糊评价法(analytic hierarchy process and fuzzy comprehensive evaluation,AHP-FCE),并利用该方法对村镇固体废弃物的...展开更多 本文提出了一种基于㶲分析的层次分析-模糊评价法(analytic hierarchy process and fuzzy comprehensive evaluation,AHP-FCE),并利用该方法对村镇固体废弃物的固定床气化工艺进行评价、预测和优选.首先,利用㶲分析法计算出气化系统的㶲效率;其次,结合AHP法和FCE法从㶲效率、产气率、产气LHV、温室气体和废渣排放量5种评价指标对气化工艺进行综合性评价.结果表明:当T=1000℃、ER=0.35时,该气化系统的综合评分最高;氧气-水蒸气气化工艺优于空气气化和水蒸气气化;上吸式空气气化和下吸式氧气-水蒸气气化评分较高,即为最优的村镇固体废弃物固定床气化工艺.收起
期刊：
FRONTIERS IN EARTH SCIENCE,2023年11:1174017 ISSN：2296-6463
通讯作者：
Tang, M
作者机构：
[Tang, Miao; Chen, Jin; Deng, Hao; Mao, Xiancheng; Tang, M; Liu, Zhankun; Wang, Jinli] Cent South Univ, Sch Geosci & Info Phys, Key Lab Metallogen Predict Nonferrous Met & Geol E, Minist Educ, Changsha, Peoples R China.;[Chen, Jin; Deng, Hao; Mao, Xiancheng; Liu, Zhankun; Wang, Jinli] Hunan Key Lab Nonferrous Resources & Geol Hazards, Changsha, Peoples R China.;[Tang, Miao; Tang, M] Hunan City Univ, Sch Municipal & Geomat Engn, Yiyang, Peoples R China.
通讯机构：
[Tang, M ] C;Cent South Univ, Sch Geosci & Info Phys, Key Lab Metallogen Predict Nonferrous Met & Geol E, Minist Educ, Changsha, Peoples R China.;Hunan City Univ, Sch Municipal & Geomat Engn, Yiyang, Peoples R China.
关键词：
association rules analysis;favorable mineralization site;Jiaojia goldfield;metallogenic information extraction;spatial constraints
摘要：
Mesozoic orogenic gold deposits in the Jiaojia goldfield, Eastern China show the features of regular mineralization spatial distribution and have long been captivated the attention of geologists. This study integrates 3D modeling, model space analysis, and association rule analysis to extract the relationship between structural deformation and gold mineralization. The Apriori algorithm with spatial constraints is used to quantify the favorable mineralization sites in the Jiaojia gold field using different combinations of ore-controlling indicators. The first favorable mineralization site has a 44% probability of mineralization and is primarily located in segments of the fault footwall within 25 m of the fault buffer where the transition from steep to gentle occurs (similar to 1-24). Its uniform distribution indicates that the ore-bearing space near the main fault plane is relatively wide, and hydrothermal diffusion is relatively uniform. Site No. 2 has a 45% probability of mineralization and is located in convex segments (6-35 m) between 25 and 55 m of the fault footwall. The equidistant zonal distribution in this area indicates that secondary faults and fractures have facilitated the migration of hydrothermal fluids, resulting in the formation of extensive ore-bearing spaces. Site No. 3 sited in convex segments (similar to 0-6 m) distal to the fault footwall (similar to 55-515 m) of the fault buffer where the dip is gentle (similar to 30 degrees-35 degrees). The binary structure of differing dips formed by the intersection of steeply dipping orebodies and the slowly dipping orebodies in the central and southern parts of the Nanlu-Xinmu deposit exhibit the complex channel away from the main fault. In this study, the correlation between ore-controlling factors and mineralization in Jiaojia fold field is quantitatively expressed as favorable mineralization sites in the form of association rules, it would contribute to a deeper understanding of the underlying mechanisms governing the formation of structure-controlled orogenic gold deposits in the Jiaojia goldfield.
作者机构：
湖南城市学院市政与测绘工程学院,湖南益阳 413000;中南大学地球科学与信息物理学院,湖南长沙 410083;[高光明; 彭恩生] School of Geosciences and Info-Physics, Central South University, Hunan, Changsha, 410083, China;[席振] School of Municipal and Geomatics Engineering, Hunan City University, Hunan, Yiyang, 413000, China, School of Geosciences and Info-Physics, Central South University, Hunan, Changsha, 410083, China
摘要：
The serial compound fluidized bed gasification process of HMSW (high moisture solid waste) is studied, and the semi-empirical kinetic model is established by combining hydrodynamics and reaction kinetics. The model include combustion sub-model and gasification sub-model, which are divided into dense phase and dilute phase for simulation. The dense phase is simulated by the three-phase bubble bed theory, and the dilute phase is simulated by Wen-Chen entrainment elutriation model combined with the ring-core model. The pyrolysis model is based on the empirical relationship. The effects of gasification temperature, S/HMSW (steam/high moisture solid waste) ratio, HMSW/C (high moisture solid waste/coal) ratio, and moisture on the gasification process are studied. The results show that the gasification temperature of 1000 degrees C, S/HMSW of 1.13, HMSW/C of 3, and moisture of 26% are the optimal gasification parameters. The study can guide the design, operation, and optimization of the serial compound gasification process.
摘要：
Tetracycline (TC) is an important antibiotic extensively used in livestock breeding and aquaculture, and so an effective removal strategy is urgently needed. This study explores the use of a series of hydroxyapatite calcinated at different temperatures (300, 400, 500, 600, and 700 degrees C) to activate peroxymonosulfate (PMS) for the removal of TC. The optimal conditions for the removal of 10 mg/L TC using hydroxyapatite calcinated at 600 degrees C (CHAP600) as a catalyst were determined to be: pH of 6.0, a catalyst dosage of 0.2 g/L and a PMS concentration of 0.3 mM. Under these conditions, the removal efficiency of TC reached 94 %. The potential degradation pathway of TC was proposed by identifying the intermediates using High Performance Liquid Chromatography/ Triple Quad mass spectrometry. The characterization analysis revealed that the presence of calcium carbonate on the surface of CHAP600 promoted the generation of singlet oxygen (1O2). Additionally, the phosphate group in CHAP600 served as a catalyst for the production of sulfate radicals (SO4 & BULL;-) from PMS, which subsequently react with hydroxyl or surface hydroxyl group to generate hydroxyl radicals (& BULL;OH). And the active species 1O2 is the most significant contributor to the catalytic degradation process of TC by CHAP600 activated PMS, followed by & BULL;OH, and then SO4 & BULL;-. This study provides new insight for the mechanism of removing organic contaminants using PMS activated with calcined hydroxyapatite.
期刊：
Journal of the Indian Society of Remote Sensing,2023年51(10):2041-2056 ISSN：0255-660X
通讯作者：
Huang, CJ
作者机构：
[Xue, Yun; Huang, Changjun; Cao, Yuanzhi; Liu, Fenliang] Hunan City Univ, Sch Municipal & Surveying Engn, Yiyang 413000, Peoples R China.;[Huang, Changjun] Key Lab Key Technol Digital Urban Rural Spatial Pl, Yiyang 413000, Peoples R China.;[Zhou, Lv] Guilin Univ Technol, Sch Geomat & Geoinformat, Guilin 541004, Peoples R China.
通讯机构：
[Huang, CJ ] H;Hunan City Univ, Sch Municipal & Surveying Engn, Yiyang 413000, Peoples R China.;Key Lab Key Technol Digital Urban Rural Spatial Pl, Yiyang 413000, Peoples R China.
关键词：
Longmenshan fault zone;Wenchuan earthquake;SBAS-InSAR;Deformation characteristic;ENVISAT ASAR
摘要：
Fault activity property is one of the main reasons caused by the motion of crustal fault, and the research of fault activity characteristics has become an important direction in the study of earthquake prediction, which is an important source of new theory and new method in earthquake prediction science. The disastrous May 12, 2008, Mw7.9 Wenchuan earthquake in the Longmenshan fault zone (LFZ) took the local population as well as scientists by surprise. To analyze the temporal and spatial deformation characteristics of the Mao county-Wenchuan fault, the Beichuan-Yingxiu fault, and Jiangyou-Guan County in the central south segment of the LFZ after the Wenchuan earthquake, the SBAS-InSAR method was adopted to derive surface deformation rate with 20 Envisat SAR images acquired between August 6, 2007, and July 26, 2010. Our analysis shows that the overall movement speed of LFZ increased significantly, reaching about - 40 mm/year, which shows a dextral compression strike-slip. From west to east, the velocity changes of each section are different, and the movement of the front-range fault is dominant in the middle and south sections of Longmenshan, which is close to the epicenter. The reason may be related to the fact that the middle and south section of Longmenshan is the epicenter of the earthquake. The southern and mid-southern sections of the LFZ change from west to east, and the direction of profile movement increases gradually. In the middle and north segment of the fault zone between the two, the variation characteristics are not obvious. To a certain extent, it indicates that the fault is characterized by dextral strike-slip compression in the southern segment and the mid-southern segment. The difference in the profile movement direction in the LFZ may be related to the stress release of the southern segment of the LFZ after the earthquake while the movement of the northern segment of the LFZ was blocked. The research results will reveal the mechanism of earthquake pregnancy and earthquake generation of LFZ, enrich the knowledge of the impact on the aftershock distribution of the Wenchuan earthquake, and promote the development of earthquake prediction research.
