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《Journal of Anqing Normal University(Natural Science Edition)》 2018-02
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Properties of Soil Microbial Metabolic Activity under Long-term Petroleum Contamination

HU Chun;WAN Zhenzhen;LIU Haijun;ZHOU Baohua;School of Resources and Environment, Anqing Normal University;  
Crude oil contaminated soil samples were collected around injection and production wells in the oilfield. Microcalorimetric analysis and FDA enzymic method were selected to explore responses of soil microorganisms under longterm petroleum contamination for providing theoretical and technical support for the bioremediation. Results showed that long-ter contamination not only affects the water storage capacity of oil system, but also interferes with the nutrients cycling of carbon, nitrogen and phosphorus. Meanwhile, oil contamination seriously hinders soil microbial activity, for the FDA enzyme activity has an average value of 21 μg/g in high contaminated soils, but about 56 μg/g in uncontaminated ones. In addition, oil contamination could change the thermal metabolic process of soil microorganisms, while crude oil content had a negative correlation with parameters P_(max)(r=-0.749, P0.05), Q_(total)(r=-0.804, P0.01) and k(r=-0.835, P0.01), but a positive correlation with parameter T(r=0.794, P0.05). Pearson analysis and RDA also indicated that environmental factors,such as soil moisture, available phosphorus and available nitrogen are positively related to soil microbial activity. This conclusion may provide significant information for bioremediation of petroleum contaminated soil.
【Fund】: 国家自然科学基金项目(41603083);; 安徽省教育厅重点项目(KJ2016A432)
【CateGory Index】: X172;X53
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