| 生物修复对黄土壤中石油烃的去除作用及影响因素 |
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| 引用本文： | 吴蔓莉,张晨,祁燕云,叶茜琼,祝长成.生物修复对黄土壤中石油烃的去除作用及影响因素[J].农业环境科学学报,2018,37(6):1159-1165. |
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| 作者姓名： | 吴蔓莉 张晨 祁燕云 叶茜琼 祝长成 |
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| 作者单位： | 西安建筑科技大学环境与市政工程学院西北水资源与环境生态教育部重点实验室 |
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| 基金项目： | 国家自然科学基金项目（21577109）；陕西省自然科学基金项目（2015JM5163） |
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| 摘 要： | 利用微生物法对石油污染黄土壤进行实验室模拟修复研究,通过测定修复过程中的不同组分烃、不同形态氮和有效磷含量,石油烃降解菌数量对修复效果及影响因素进行了评价。结果发现,经过5周的修复处理,生物刺激法处理的土壤中总石油烃、烷烃、多环芳烃的去除率分别为14.54%、21.98%、33.14%,土壤铵态氮含量由初始添加的210.4 mg·kg-1降低至97.2 mg·kg-1,土壤硝态氮含量在修复过程中基本保持不变。经过生物刺激修复的土壤中石油烃、烷烃、多环芳烃降解菌数分别为1.60×105、3.09×105、7.08×103,而未经修复处理的土壤中三种烃降解菌数量分别为2.69×10~4、2.57×10~4、4.07×103。结果表明利用生物刺激法可有效去除黄土壤中的石油烃。影响石油污染黄土壤生物修复作用的限制性因素为土壤中铵态氮和有效磷含量,与未经修复处理的石油污染土壤相比,生物刺激处理使土壤中烃降解菌数量增加。
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| 关 键 词： | 石油污染黄土壤 生物强化 生物刺激 铵态氮 降解菌数量 限制性因素 |
| 收稿时间： | 2017/11/8 0:00:00 |
Degradation of petroleum hydrocarbons during the bioremediation of cultivated loessial soil |
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| WU Man-li,ZHANG Chen,QI Yan-yun,YE Xi-qiong and ZHU Chang-cheng.Degradation of petroleum hydrocarbons during the bioremediation of cultivated loessial soil[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2018,37(6):1159-1165. |
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| Authors: | WU Man-li ZHANG Chen QI Yan-yun YE Xi-qiong and ZHU Chang-cheng |
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| Institution: | School of Environmental and Municipal Engineering, Xi''an University of Architecture and Technology, Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi''an 710055, China,School of Environmental and Municipal Engineering, Xi''an University of Architecture and Technology, Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi''an 710055, China,School of Environmental and Municipal Engineering, Xi''an University of Architecture and Technology, Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi''an 710055, China,School of Environmental and Municipal Engineering, Xi''an University of Architecture and Technology, Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi''an 710055, China and School of Environmental and Municipal Engineering, Xi''an University of Architecture and Technology, Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi''an 710055, China |
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| Abstract: | A microcosm study was conducted to assess the effects of bioremediation and limiting factors on petroleum hydrocarbon degradation during the remediation of oil-contaminated soil. The contents of petroleum hydrocarbons, nitrogen(total N, nitrate N, and ammonium N), available phosphorus, and hydrocarbon-degrading microorganisms were measured during bioremediation. The correlations between petroleum hydrocarbon degradation and influential factors were analyzed using SPSS 19.0. Biostimulation was more effective than bioaugmentation in removing petroleum hydrocarbons from the cultivated loessial soil and degraded 14.54%, 21.98%, and 33.14% of the total petroleum hydrocarbons(TPH), alkanes, and polycyclic aromatic hydrocarbons(PAHs) respectively within five weeks. The ammonium N content of the soil decreased from 210.4 mg·kg-1 to 97.2 mg·kg-1, and the nitrate N was unaffected. The populations of TPH-, alkane-, PAH-degraders reached 1.60×105, 3.09×105, and 7.08×103 CFU g-1 soil, respectively, in the biostimulation treatment, which was greater than those in the control treatment. Correlation analysis indicated that bioremediation was limited by the contents of available phosphorus and ammonium N, which were related to TPH and alkane degradation. |
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| Keywords: | petroleum contaminated cultivated loessial soil bioaugmentation biostimulation ammonium nitrogen hydrogen-degrading population limiting factor |
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