石油污染土壤生物修复过程中影响修复效果和土壤毒性的因素分析

发布时间：2019-03-24 19:45

【摘要】：研究了不同生物修复方式对油田区长期污染土壤的修复效果,分析了石油污染物同微生物变量及土壤理化性质变量的典型相关性。在90d的修复过程中,对土壤中石油烃、微生物性质变量、土壤理化性质变量以及土壤毒性进行测定。结果表明,添加氮磷钾复合肥、褐煤粉和诺沃肥的生物刺激方法对土壤中总石油烃及饱和烃的去除率最高。添加菌剂的生物强化方法对土壤中芳香烃和16种多环芳烃的去除率最高,且土壤毒性降低最明显。典型相关分析结果表明,土壤中总石油烃和饱和烃的降解与总异养菌数、脱氢酶活性、脂肪酶活性及氮的含量相关;土壤中芳香烃的降解与石油烃降解菌数有关,并对修复后的土壤毒性产生影响。
[Abstract]:The remediation effects of different bioremediation methods on long-term polluted soils in oilfield area were studied, and the typical correlations between petroleum pollutants and microbial variables and soil physical and chemical properties variables were analyzed. During 90 days of remediation, petroleum hydrocarbons, microbial property variables, soil physical and chemical properties variables and soil toxicity were measured. The results showed that the removal rate of total petroleum hydrocarbon and saturated hydrocarbon in soil was the highest by adding N, P and K compound fertilizer, brown coal powder and Novar fertilizer. The removal rate of aromatic hydrocarbons and 16 polycyclic aromatic hydrocarbons (PAHs) in soil was the highest and the toxicity of soil was decreased most obviously by bioaugmentation method. The results of canonical correlation analysis showed that the degradation of total petroleum hydrocarbons and saturated hydrocarbons in soil was related to the number of heterotrophic bacteria, dehydrogenase activity, lipase activity and nitrogen content. The degradation of aromatic hydrocarbons in soil is related to the number of bacteria degrading petroleum hydrocarbons and has an effect on the soil toxicity after remediation.
【作者单位】：山西大同大学化学与环境工程学院;住房和城乡建设部科技发展促进中心;
【基金】：国家自然科学基金项目(51508316) 国家高技术研究发展计划“863计划”重点项目(2007AA061200) 山西省基础研究项目(2015021136) 大同市科技攻关项目(2016110) 山西大同大学博士科研启动基金项目资助
【分类号】：X53

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