Remediation of weathered petroleum oil-contaminated soil using a combination of biostimulation and modified Fenton oxidation
- 作者：Xiao-Bao Gong ; gxb@ecjtu.jx.cn
- 关键词：Petroleum hydrocarbons ; Nitrilotriacetic acid ; Metabolites ; Fluorescein diacetate activity
- 刊名：International Biodeterioration and Biodegradation
- 出版年：2012
- 期刊代码：37_09648305
- 类别：ms
- 出版时间：May, 2012
- 卷：70
- 期：Complete
- 页码：89-95
- 文件大小：350 K
摘要
In this work, remediation of weathered crude oil-contaminated soil by biostimulation of indigenous microbes through addition of peanut hull as bulking agent was conducted in laboratory. A modified Fenton oxidation, using Fe(III) chelated with nitrilotriacetic acid in a molar ratio of 1:1 as a catalyst, was applied to the bioremediation. The results showed that, after bioremediation for 20 weeks, reduction of total petroleum hydrocarbons (TPHs) by 88.9%was observed in the combined treatment compared with 55.1%in the biological treatment alone. The Microtox庐 toxicity of treated soil extract was reduced greatly after the chemical oxidation process. Biostimulation with inorganic nitrogen and phosphorus increased TPH degraders in the treated soil by two orders of magnitude. The activity of microbial communities also increased markedly in the treated soil compared with that in the control.