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| Controlling factors and strategies to improve the bioremediation of organically contaminated soil：A review |
| Received:October 11, 2021 |
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| KeyWord:soil;organic pollution;degradation;speciation;bioremediation;limiting factor |
| Author Name | Affiliation | E-mail | | WU Min | Faculty of Environmental Science and Engineering, Yunnan Provincial Key Laboratory of Carbon Sequestration and Pollution Control in Soils, Kunming University of Science & Technology, Kunming 650500, China | | | SHI Keting | Faculty of Environmental Science and Engineering, Yunnan Provincial Key Laboratory of Carbon Sequestration and Pollution Control in Soils, Kunming University of Science & Technology, Kunming 650500, China | | | CHEN Quan | Faculty of Environmental Science and Engineering, Yunnan Provincial Key Laboratory of Carbon Sequestration and Pollution Control in Soils, Kunming University of Science & Technology, Kunming 650500, China | | | LIANG Ni | Faculty of Environmental Science and Engineering, Yunnan Provincial Key Laboratory of Carbon Sequestration and Pollution Control in Soils, Kunming University of Science & Technology, Kunming 650500, China | liangnikust@163.com | | PAN Bo | Faculty of Environmental Science and Engineering, Yunnan Provincial Key Laboratory of Carbon Sequestration and Pollution Control in Soils, Kunming University of Science & Technology, Kunming 650500, China | |
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| Abstract: |
| Organic pollutants in soil mainly come from the application of organic pesticides, petroleum pollution, and industrial production, which cause great harm to the environment and human health. Various technologies, such as physical, chemical, and biological methods, can be applied for treating organically contaminated soil. Among these techniques, bioremediation is recognized as the most effective, environmentally friendly, and economical technology for the remediation of organically contaminated soil, but its remediation efficiency is restricted by many factors. This paper systematically discussed the factors controlling bioremediation from three aspects：climate and geographical conditions, the speciation of organic pollutants, and the nutrition conditions in the soil environment. Accordingly, methods to improve the efficiency of bioremediation have been proposed from three aspects：the selection of microorganism species, the bioavailability enhancement of organic pollutants（introducing microorganisms or soil animals and adding surfactants and organic solvents）, and the construction of stable ecosystems（addition of biochar, nutritional supplements, and electric and biological composites）. This paper proposes methods to improve the efficiency of bioremediation and emphasizes the potential of the combination of different techniques in the remediation of organically contaminated soils. |
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