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Review
. 2022 Dec 14;19(24):16767.
doi: 10.3390/ijerph192416767.

In Situ Remediation Technology for Heavy Metal Contaminated Sediment: A Review

Qinqin Xu  1 , Boran Wu  1 , Xiaoli Chai  1
Affiliations
Review

In Situ Remediation Technology for Heavy Metal Contaminated Sediment: A Review

Qinqin Xu et al. Int J Environ Res Public Health. .

Abstract

Sediment is an important part of the aquatic ecosystem, which involves material storage and energy exchange. However, heavy metal pollution in sediment is on the increase, becoming an important concern for the world. In this paper, the state-of-art in situ remediation technology for contaminated sediment was elaborated, including water diversion, capping, electrokinetic remediation, chemical amendments, bioremediation and combined remediation. The mechanisms for these techniques to reduce/immobilize heavy metals include physical, electrical, chemical and biological processes. Furthermore, application principle, efficiency and scope, advantages and disadvantages, as well as the latest research progress for each restoration technology, are systematically reviewed. This information will benefit in selecting appropriate and effective remediation techniques for heavy metal-contaminated sediment in specific scenarios.

Keywords: bioremediation; chemical remediation; heavy metal; physical remediation; sediment.

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Conflict of interest statement

The authors declare no conflict of interest.

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Figure 1
Figure 1
Schematic diagram of EKR (The most important electron transfer reactions at electrodes is the electrolysis of water).
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