Application of bioremediation in oil contaminated soil |
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| Authors: | ZHANG Sheng ZHANG Cui-yun HE Ze CHEN Li YIN Mi-ying NING Zhuo SUN Zhen-hua ZHEN Shi-jun ZHANG Fa-wang |
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| Institution: | 1Institute of Hydrogeology and Environment Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050061, China.2Hebei Key Laboratory of Groundwater Remediation, Shijiazhuang 050061, China. |
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| Abstract: | The long-term oil exploitation in oil fields has led to pollution of surrounding soil, creating a serious ecological problem. In order to promote and improve the application of microbial remediation in oil contaminated soil, experiment is carried out in polluted area in Zhongyuan Oilfield. In the experiment, indigenous microorganisms and other physical and chemical methods are employed, ryegrass is grown, and environmental factors in soil are regulated to degrade the oil and treat the polluted soil. Results show that when the average oil content in the soil is about 523.08 mg/kg, 65 days’ remediation through plants and microorganisms could help bring the oil content down to 74.61 mg/kg, achieving a degradation rate of 85.74%; through salinity treatment, salt content in soil is reduced by 62.93-82.03% to 399-823 mg/kg from previous 2.22 g/kg. Through this experiment, the bioremediation method is improved and its effectiveness and feasibility are testified. The result has been applied in Zhongyuan Oilfield and has brought fair ecological and economic benefits, providing technical support to the treatment of contaminated soil of the same kind, and offering some insights to the treatment of soil contaminated by other organic pollutants. |
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| Keywords: | Central plain Oil contaminated soil Bioremediation Application |
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