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| Solid-solution partitioning of arsenic （As） in the paddy soil profiles in Chengdu Plain, Southwest China | |
| 作者姓名： | Xiaoyan Yang Qingye Hou Zhongfang Yang Xin Zhang Yijun Hou |
| 作者单位： | [1]School of Earth Science and Resources, China University of Geosciences （Beijing）, Beijing 100083, China [2]National Research Center for Geoanalysis, Chinese Academy of Geological Sciences, Beijing 100037, China [3]Information Center, Ministry of Land and Resources of the People＇s Republic of China, Beijing 100033, China |
| 摘 要： | To predict the long-term behavior of arsenic(As) in soil profiles,the solid-solution partitioning of As was studied in four paddy soil profiles obtained from agricultural areas in Chengdu Plain,Southwest China.Paddy soil profile samples were collected and soil solution samples were extracted.Total As contents in soil solution and soil solid were analyzed,along with the soil solid phase properties.The As in soil solution was significantly higher in the upper layer(0—20 cm) and had a definite tendency to decrease towards 40 cm regardless of the sampling locations.When the concentration of arsenic in soil solution decreased,its content in solid phase increased.Field-based partition coefficient(K_d) for As was determined by calculating the ratio of the amount of As in the soil solid phase to the As concentration in the soil solution.K_d values varied widely in vertical samples and correlated well with soil pH,total organic carbon(TOC) and total As. The results of this study would be useful for evaluating the accumulation trends of arsenic in soil profiles and in improving the management of the agricultural soils. |
| 关 键 词： | Soil profiles Arsenic(As) Soil solution Partition coefficient(K_d) Geochemistry |
| 收稿时间： | 10 November 2011 |
http://www.sciencedirect.com/science/article/pii/S1674987112000382 |
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| Xiaoyan Yang,Qingye Hou,Zhongfang Yang,Xin Zhang,Yijun Hou.http://www.sciencedirect.com/science/article/pii/S1674987112000382[J].Geoscience Frontiers,2012,3(6):901-909. | |
| Authors: | , Xiaoyan Yang , Qingye Hou , Zhongfang Yang , Xin Zhang , Yijun Hou |
| Institution: | 1. School of Earth Science and Resources, China University of Geosciences(Beijing), Beijing 100083, China 2. National Research Center for Geoanalysis, Chinese Academy of Geological Sciences, Beijing 100037, China 3. Information Center, Ministry of Land and Resources of the People's Republic of China, Beijing 100033, China |
| Abstract: | To predict the long-term behavior of arsenic (As) in soil profiles, the solid-solution partitioning of As was studied in four paddy soil profiles obtained from agricultural areas in Chengdu Plain, Southwest China. Paddy soil profile samples were collected and soil solution samples were extracted. Total As contents in soil solution and soil solid were analyzed, along with the soil solid phase properties. The As in soil solution was significantly higher in the upper layer (0–20 cm) and had a definite tendency to decrease towards 40 cm regardless of the sampling locations. When the concentration of arsenic in soil solution decreased, its content in solid phase increased. Field-based partition coefficient (Kd) for As was determined by calculating the ratio of the amount of As in the soil solid phase to the As concentration in the soil solution. Kd values varied widely in vertical samples and correlated well with soil pH, total organic carbon (TOC) and total As. The results of this study would be useful for evaluating the accumulation trends of arsenic in soil profiles and in improving the management of the agricultural soils. |
| Keywords: | Soil profiles Arsenic （As） Soil solution Partition coefficient （Kd）Geochemistry |
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