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| Mitigation of cadmium and arsenic in rice plant by soil application of steel slag and/or biochar with water management |
| Received:June 01, 2018 |
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| KeyWord:steel slag;cadmium;arsenic;rice;water management;mitigation |
| Author Name | Affiliation | E-mail | | CAO Jian | School of Geography and Planning, Sun Yat-Sen University, Guangzhou 510275, China
School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China
Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology, Guangzhou 510275, China
The Joint Soil Remediation Research Center of Sun Yat-Sen University and Topcent Enviro Group LTD, Dongguan 523000, China | | | CHEN Zhe | School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China | | | WU Qing | School of Geography and Planning, Sun Yat-Sen University, Guangzhou 510275, China | wuqing@mail.sysu.edu.cn | | WU Zhuo-hao | School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China | | | DONG Han-ying | School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China
Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology, Guangzhou 510275, China | | | YAO Ai-jun | School of Geography and Planning, Sun Yat-Sen University, Guangzhou 510275, China
The Joint Soil Remediation Research Center of Sun Yat-Sen University and Topcent Enviro Group LTD, Dongguan 523000, China | | | QIU Rong-liang | School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China
Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology, Guangzhou 510275, China
The Joint Soil Remediation Research Center of Sun Yat-Sen University and Topcent Enviro Group LTD, Dongguan 523000, China | | | WANG Shi-zhong | School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China
Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology, Guangzhou 510275, China
The Joint Soil Remediation Research Center of Sun Yat-Sen University and Topcent Enviro Group LTD, Dongguan 523000, China | | | HE Er-kai | School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China
Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology, Guangzhou 510275, China
The Joint Soil Remediation Research Center of Sun Yat-Sen University and Topcent Enviro Group LTD, Dongguan 523000, China | | | TANG Ye-tao | School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China
Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology, Guangzhou 510275, China
The Joint Soil Remediation Research Center of Sun Yat-Sen University and Topcent Enviro Group LTD, Dongguan 523000, China | |
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| Abstract: |
| Simultaneous mitigation of cadmium(Cd) and arsenic(As) in rice grain has been a great challenge, in contaminated paddy soilrice system. Here, a soil column experiment and a field experiment were conducted to investigate the optimal mitigation strategies on Cd and As contaminated paddy soil by soil application of steel slag and/or biochar with water managements. Soil column experimental results showed that continuous flooding(CF) decreased Cd but increased As concentrations in soil solutions. Soil application of steel slag(SS) significantly increased soil pH but decreased soil Eh. Meanwhile, SS treatment reduced the Fe/Cd concentrations but increased Mn/As concentrations in soil solutions. The field trial data showed that there was a significant negative correlation(R=-0.838, P<0.05) between brown rice Cd and brown rice As. The results indicate that aerobic condition could not reduce Cd accumulation in rice grain. However, soil application of steel slag and biochar with continuous flooding condition(CF+SS+BC) had the best mitigation effect on both Cd and As concentrations(rice Cd reduced by 80% and rice As kept unchanged) in rice grain simultaneously. Hence it could be one of the effective strategies to mitigate Cd and As accumulation in rice plant. |
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