| 地球化学工程技术修复江西某Pb超标耕地的应用 |
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| 关键词:remediation heavy metal geochemical engineering technology easy-migrate-speciation effect |
| 基金项目:国家公益性行业科研专项(编号: 201211078); 中国地质科学院基本科研业务费项目(编号: YYWF201722; YYWF201617) |
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| The Application of Geochemical Engineering Technology to the Remediation of a Pb Polluted Abandoned Farmland in Jiangxi Province |
| For the purpose of determination of the effect of geochemical materials in soil improvement and heavy metal remediation, three remediation methods were used on a 249 m2 abandoned land in Longnan area of Jiangxi province, where farmland was abandoned due to wastewater pollution from rare earth mining. The technical effectiveness of these three methods was evaluated after one cycle of comparing changes of the easy-migrate-speciation of heavy metals in the soil before and after remediation. The results showed that the element of highest degree of excess was Pb with the amount of 101.50 mg?kg-1, followed by Cd (0.13 mg?kg-1), Hg (0.13 mg?kg-1) and As (2.98 mg?kg-1) which all exceeded the background value of soil in Ganzhou, Longnan. Pb, which exceeded the average soil Pb content in Longnan, was selected as the remediation target. In the soil of this area, the content of available Pb was not significantly correlated with the total amount. Using geochemical engineering technology, the authors detected that the treatment effect was obvious, as shown by the fact that the easy-migrate-speciation of Pb decreased by 3.25%. After one cycle, the repair effect was stable with reduction of Pb easy-migrate-speciation by 1.40% on average. Method C is considered to be the best solution with the reduction of Pb by 3.38 mg?kg-1, and its cost is the cheapest. |
| TAN Ke-yan,WANG Zhe,CAI Jing-yi,CHEN Yan-fang,WANG Zhuo,LIU Jiu-chen,TANG Qi-feng,YUAN Xin,YANG Hong.2017.The Application of Geochemical Engineering Technology to the Remediation of a Pb Polluted Abandoned Farmland in Jiangxi Province[J].Acta Geoscientica Sinica,38(6):953-960. |
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