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| Remediation of Arsenic and Antimony Contaminated Soil by Fe-loading Biochar |
| Received:November 24, 2020 Revised:November 24, 2020 |
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| DOI：doi：10.3969/j.issn.1007-7545.2020.12.017 |
| KeyWord:antimony; arsenic; biochar; stabilization remediation; soil |
| Author | Institution |
| GAO Shikang |
中南大学冶金与环境学院 |
| YANG Zhihui |
中南大学冶金与环境学院 |
| Zhou Lianbi |
矿冶科技集团有限公司 |
| ZENG Xiankun |
中国瑞林工程技术股份有限公司 |
| CHAI Xilin |
中南大学冶金与环境学院，江西盖亚环保科技有限公司 |
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| Abstract: |
| Soil contamination of Sb and As in mining areas of China is quite serious. Chemical stabilization is one of important methods for remediation of Sb and As contaminated soil. Using rice straw as raw material, a Fe-loading biochar with specific surface area of 33.11 m2/g was prepared by hydrothermal carbonization. Fe loading significantly enhanced carbonization and improved biochar characteristics. Fe-loading biochar has higher performances for stabilizing Sb(Ⅴ) and As(Ⅴ) than that for Sb(Ⅲ) and As(Ⅲ). Stabilization percentage of water-soluble As(Ⅴ) and Sb(Ⅴ) is 51.22% and 58.33% respectively. Stabilization percentage of bioavailable As(Ⅴ) and Sb(Ⅴ) is 53.67% and 52.33% respectively. Stabilization of soil antimony and arsenic by Fe-loading biochar contributes to transformation of non-specifically adsorbed and specifically adsorbed antimony and arsenic to poorly crystalline and crystalline iron-aluminum oxide combined state. |
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