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| Effect of sulfur on the bioavailability of arsenic in soil and its accumulation in rice plant(Oryza sativa L.) |
| Received:May 28, 2018 |
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| KeyWord:arsenic;paddy soil;sulfur;bioavailability;iron plaque |
| Author Name | Affiliation | E-mail | | ZOU Li-na | College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China | | | DAI Yu-xia | College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China | | | QIU Wei-di | Shanghai Keling Analytical Technology Co., Ltd, Shanghai 200123, China | | | ZHANG Shu | College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China | | | ZHAO Jia-wei | College of Environment, Zhejiang University of Technology, Hangzhou 310032, China | | | TANG Xian-jin | College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China | xianjin@zju.edu.cn | | SHI Ji-yan | College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China | | | XU Jian-ming | College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China | |
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| Abstract: |
| In order to investigate the effect of sulfur on the migration and transformation of arsenic(As) in soil-rice system, different forms of sulfur were applied to the exogenous As-contaminated soil. Soil solution was collected during the whole growth period, and rice plants were collected at the maturing stage. The effect of sulfur on the mobility and bioavailability of As and the influence on As accumulation in rice was examined. The results showed that the microorganisms played an important role in affecting the mobility of Fe(Ⅱ) and As in soil solution, and there was a great difference between sterilization treatment and non-sterilization treatment. The addition of sulfur reduced the mobility of As in the rhizosphere and non-rhizosphere soil solution, reduced the concentration of As(Ⅲ), and thus reduced the toxicity of As. Sulfur also reduced As bioavailability in the rhizosphere soil. With the same sulfur content, Na2SO4 was more effective than S0. The growth of rice was also promoted and more iron plaque was formed on the root surface. The addition of sulfur reduced As accumulation in rice shoots to a certain extent. However, excess sulfur might increase the accumulation of As in rice. |
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