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| Screen Experiments of Simultaneous Passivators on Cd, As, Zn and Cu in Compound Contaminated Soil |
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Received:January 22, 2021
Revised:January 26, 2021
Accepted:February 01, 2021
Published Online:June 21, 2021
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| DOI：doi：10.3969/j.issn.1007-7545.2021.07.017 |
| KeyWord:passivator; screen; Cd, As, Zn; Cu; compound contaminated soil |
| Author | Institution |
| LIAO Chang-jun |
广西博世科环保科技股份有限公司 |
| LI Qiu-jun |
广西博世科环保科技股份有限公司 |
| CAO Fei-shu |
广西博世科环保科技股份有限公司 |
| LU You-zhi |
桂林理工大学南宁分校 |
| QIN Hao |
广西博世科环保科技股份有限公司 |
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| Abstract: |
| In order to investigate in situ passivation process of compound contaminated soil contained Cd, As, Zn and Cu, simultaneous passivation test was implemented applying charcoal, iron powder and some corresponding compound on agricultural soil in Nandan county, Guangxi as objects. The results show that different simultaneous passivators lead to disparate consequence. Compound of calcium oxide and ferrous sulfate can passivate four metals simultaneously under proportion of 3% or 6% when they are mixed for 20 days. The best performance coming from compound of No.1 charcoal and iron powder conducted for 10 days with proportion of 6%, which decreases available Cd, As, Zn and Cu by 50.22%, 49.95%, 41.40% and 29.18%, respectively, and corresponding residual fraction increases by 6%, 13%, 14% and 1.8%, respectively, compared with blank group. Adding of every simultaneous passivator increases organic matter content in soil. |
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