Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 838, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2022.156417
Keywords
Heavy metal; Contaminated sites; Soil remediation technology; Remediation mechanism; Combined technology
Categories
Funding
- National Key Research Development Plans of Special Project for Site Soils [2018YFC1801001]
- National Natural Science Foundation of China [42177069, 41807125, U1906225]
- China Postdoctoral Science Foundation [2018M632703]
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This review comprehensively discusses mainstream soil remediation technologies for heavy metal contaminated sites, including physical, biological, chemical, and combined remediation methods. The influencing factors, advantages, disadvantages, remediation mechanism, and practical applications are deeply explored, and corresponding remediation strategies are proposed.
With the increasing development of industry and urbanization, heavy metal contaminated sites have become progressively conspicuous, particularly by unreasonable emissions from electroplating, nonferrous metals smelting, mine tailing, etc. In recent years, soil remediation technologies for heavy metal contaminated sites have developed rapidly. New and effective remediation technologies have emerged successively, and more successful practical applications have appeared. Therefore, systematical summarization of the current progress is essential. As a result, in this paper, some mainstream soil remediation technologies for heavy metal contaminated sites, including physical remediation (soil thermal desorption and soil replacement), bioremediation (phytoremediation and microbial remediation), chemical remediation (chemical leaching, chemical stabilization, electrokinetic remediation-permeable reactive barrier, and chemical oxidation/reduction), as well as various combined remediation are comprehensively reviewed. The influenc-ing factors, advantages, disadvantages, remediation mechanism, and practical applications are also deeply discussed. Besides, the corresponding remediation strategies are put forward for the remediation of heavily polluted sites such as the chemical industry, smelting, and tailing areas. Overall, this review will be beneficial for the in-depth understanding and provide references for the reasonable selection and development of soil remediation technology for heavy metal contaminated sites.
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