Research Progress on Bioremediation Techniques for Mercury-contaminated Soil

doi:10.13560/j.cnki.biotech.bull.1985.2016.02.007

Abstract

Abstract: Mercury as a sole liquid metal at room temperature, is widely distributed in the environment, which easily results in the soil contamination.Bioremediation technique, as an important technique to remediate the mercury-contaminated soil, has captured attentions due to its low cost and environmental-friendly.This paper sums up the bioremediation techniques for mercury-contaminated soil, mainly on the researches and applications of phytoremediation, microbial remediation and animal remediation.In phytoremediation technology the metabolism mechanism and pattern of mercury in plants mainly are investigated；using exogenous microorganisms to degrade mercury in soil is the focus in the study of microbial remediation；and very little is studied in animal remediation, only enrichment of mercury by earthworms was reported.What is learned from the analysis in this review is that current bioremediation technique has developed to be a multidisciplinary integration technology, covering soil chemistry, plant physiology, ecology, soil microbiology, analytical chemistry and molecular biology.By means of those subjects, we may understand profoundly the rhizosphere micro-interface process in plant extracting mercury, plant internal micro-interface process, and the mechanisms of mercury enrichment by microorganism and animal.Finally, we summarize and induce the current main research trend of bioremediation techniques for mercury-contaminated soil, and clarify several main issues and research directions for the issues in this field.

Key words: mercury-contaminated, soil, phytoremediation, microbial remediation, animal remediation

WANG Li-hui, YAN Chao-yu, WANG Hao, ZHANG Xiang-yu. Research Progress on Bioremediation Techniques for Mercury-contaminated Soil[J]. Biotechnology Bulletin, 2016, 32(2): 51-58.

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