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徐金兰

教授   博士生导师    硕士生导师

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  • 教师拼音名称: xujinlan
  • 所在单位: 环境与市政工程学院
  • 学历: 研究生(博士后)
  • 性别: 女
  • 学位: 博士学位
  • 在职信息: 在职
  • 主要任职: 国际水协(IWA)会员
  • 毕业院校: 西安建筑科技大学

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论文成果

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Enhanced bioremediation of oil contaminated soil by graded modified Fenton oxidation

发布时间:2024-08-09
点击次数:
所属单位:
环境与市政工程学院
发表刊物:
Journal of Environmental Sciences
关键字:
中文关键字:oil contaminated soil; graded modified Fenton’s ox,英文关键字:oil contaminated soil; graded modified Fenton’s ox
摘要:
Graded modified Fenton’s (MF) oxidation is a strategy in which H2O2 is added intermittently to prevent a sharp temperature increase and undesired soil sterilization at soil circumneutral pH versus adding the same amount of H2O2 continuously. The primary objective of the present study was to investigate whether a mild MF pre-oxidation such as a stepwise addition of H2O2 can prevent sterilization and achieve a maximum degradation of tank oil in soil. Optimization experiments of graded MF oxidation were conducted using citric acid, oxalic acid and SOLV-X as iron chelators under different frequencies of H2O2 addition. The results indicated that the activity order of iron chelates decreased as: citric acid (51%) > SOLV-X (44%) > oxalic acid (9%), and citric acid was found to be an optimized iron chelating agent of graded MF oxidation. Three-time addition of H2O2 was found to be favorable and economical due to decreasing total petroleum hydrocarbon removal from three time addition (51%) to five time addition (59%). Biological experiments were conducted after graded MF oxidation of tank oil completed under optimum conditions mentioned above. After graded oxidation, substantially higher increase (31%) in microbial activity was observed with excessive H2O2 (1470 mmol/L, the mol ratio of H2O2:Fe2+ was 210:1) than that of non-oxidized soil. Removal efficiency of tank oil was up to 93% after four weeks. Especially, the oil fraction (C10–C40) became more biodagradable after graded MF oxidation than its absence. Therefore, graded MF oxidation is a mild pretreatment to achieve an effective bioremediation of oil contaminated soil.
备注:
徐金兰
合写作者:
辛磊,畅坤
第一作者:
黄廷林,徐金兰
论文类型:
期刊论文
卷号:
卷:23
期号:
期:11
页面范围:
页:1873-1879
是否译文:
发表时间:
2011-11-01