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Chinese Journal of Ecology ›› 2020, Vol. 39 ›› Issue (9): 3108-3117.doi: 10.13292/j.1000-4890.202009.002

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Mechanism and application of earthworm in bioremediation of soil contaminated with organic pollutants: A review.

PAN Zheng1, HAO Yue-qi1,2, ZHAO Li-xia1*, SUN Yang1, LI Xiao-jing1, YANG Si-de1, WENG Li-ping1, LI Yong-tao1,3   

  1. (1Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs/Key Laboratory of Original AgroEnvironmental Pollution Prevention and Control, MARA/Tianjin Key Laboratory of AgroEnvironment and AgroProduct Safety, Tianjin 300191, China; 2College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; 3College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China).
     
  • Online:2020-09-10 Published:2021-03-10

Abstract: Earthworm can improve soil physicochemical properties, enhance microbial activities, introduce high-efficiency biodegrading microbes, and directly or indirectly promote the degradation and transformation of organic pollutants in soil. Due to the high abundance and activities of microorganisms, drilosphere is a hot spot for the degradation of organic pollutants. In addition, bioaccumulation is one of the important mechanisms for earthworm remediation of soil organic pollutants. It is reported that earthworm can promote the degradation of various organic pollutants in soil, with broad application prospects in soil bioremediation. We reviewed the mechanisms of earthworm in the remediation of soil polluted with organic contaminants, and its application in remediating soils contaminated by polycyclic aromatic hydrocarbons, polychlorinated biphenyls, pesticides, etc. Knowledge gaps were pointed out and needs for future research were discussed. This review provides reference and basis for the bioremediation of organic polluted soils.

Key words: soil, earthworm, drilosphere, organic contaminant, bioremediation.