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| Evaluation of the effect of heavy metal immobilization remediation-field experiment study |
| Received:December 25, 2019 |
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| KeyWord:field experiments;Cd contaminated soil;immobilization remediation;effect evaluation |
| Author Name | Affiliation | E-mail | | HE Ying | School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
Technical Center for Soil, Agricultural and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing 100012, China | | | DU Ping | Technical Center for Soil, Agricultural and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing 100012, China | duping@craes.org.cn | | SHI Jing | School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
Technical Center for Soil, Agricultural and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing 100012, China | | | QIN Xiao-peng | Technical Center for Soil, Agricultural and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing 100012, China | | | XU Gang | School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China | | | WU Ming-hong | School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China | |
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| Abstract: |
| Based on field experiments, the remediation effect of several immobilization materials was studied, including calcium-magnesia phosphate fertilizer(CMP), medical stone(MS), ferric oxide adsorbent(FA), alumina composite(AC), plant-based organic fertilizer (POF), cow dung(CD)and bone char(BC). The dynamic weighted comprehensive model was established to assess the comprehensive remediation effects. The results demonstrated that the pH of the soil was slightly influenced by applying these materials, increasing by 0.68 and 0.74 units under CMP and MS treatments, respectively. The application of POF, CD and BC increased the soil organic matter content by 3.19, 2.64 g·kg-1 and 1.17 g·kg-1(10.04%, 8.31% and 3.68%)compared with the control check, respectively. Under the dosage of 0.6%, almost all materials showed good immobilization effects, the immobilization efficiency of all materials except POF exceed 18%, and the cadmium content of brown rice was significantly reduced(0.062 to 0.087 mg·kg-1), which was lower than the National Food Safety Standard of 0.2 mg·kg-1. The calculation results of the dynamic weighted comprehensive evaluation method showed that CMP was the most applicable immobilization material in this study, BC and POF come second. |
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