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.
Funder
Shanghai Science and Technology Committee
Ministry of Science and Technology, People’s Republic of China
National Natural Science Foundation of China
Tongji University
State Key Laboratory of Pollution Control and Resource Reuse
Subject
Health, Toxicology and Mutagenesis,Public Health, Environmental and Occupational Health
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