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首页> 外文会议>International Symposium on Water Resources and the Urban Environment; 20031109-10; Wuhan(CN) >Microbial Eco-system of the Contaminated Soil with Petrochemical Hydrocarbons in the Oilfields of Northern China
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Microbial Eco-system of the Contaminated Soil with Petrochemical Hydrocarbons in the Oilfields of Northern China

机译：北方油田石化烃污染土壤的微生物生态系统

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摘要

The investigations of the microbial eco-system of oil contaminate soil, such as the pollutant content and properties, the environmental elements of soil, the soil microbe community and enzyme activity have been carried out in several oilfields in northern China recent years. The results present that the petrochemical content in polluted soil the is very high soil, and the alkyl and aromatic compounds are accounted for more than 50% of the total hydrocarbon concentrations, pH value is above 7.8, and average nutrient level was lower than normal soil, effective nitrogen < 30 mg/kg dry soil and phosphorus < 10 mg/kg dry soil. Based on the evaluation of nitrogen and phosphorus levels, the effective N and P only are accounted for about 5% of total nitrogen and phosphorus, which means most parts of N and P in polluted soil cannot be used by degrading microbes during the biodegradation of the petrochemicals. The biological analysis results showed that degrading microbes reached 108 cells/g dry soil, and the FDAabs about 1.5 in the soil. It can be concluded from the field investigation and indoor experiment results that concentrations and properties of the contaminants in polluted soil in different oilfields in Northern China are available for the bioremediation, and adjusting the nutrient level and optimizing the abiotic factors of the microbial eco-system can be effective to increasing the microbial numbers and improving the enzyme activity of the degrading bacteria, and effectively enhancing the biodegradation rates.
机译：近年来，已经在中国北方的几个油田对石油污染土壤的微生物生态系统进行了研究，例如污染物的含量和性质，土壤的环境元素，土壤微生物群落和酶活性。结果表明，污染土壤中的石化含量非常高，烷基和芳香族化合物占总碳氢化合物浓度的50％以上，pH值在7.8以上，平均养分水平低于正常土壤，有效氮<30 mg / kg干燥土壤和磷<10 mg / kg干燥土壤。根据对氮和磷水平的评估，有效氮和磷仅占总氮和磷的5％，这意味着受污染土壤中的大部分氮和磷无法通过生物降解土壤中的微生物而被利用。石化产品。生物学分析结果表明，降解的微生物达到108细胞/ g干燥土壤，而FDAabs在土壤中约为1.5。从野外调查和室内实验结果可以得出结论，中国北方不同油田污染土壤中污染物的浓度和性质可用于生物修复，调节营养水平和优化微生物生态系统的非生物因子。可以有效地提高降解菌的微生物数量，提高酶的活性，有效提高生物降解率。

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