title: [Research of the natural attenuation capacity of oil pollutants based on in-situ experiment].
abstract: Based on the results of the in-situ experiment carried out in a Beijing gas station, the ways of natural attenuation were evaluated as both aerobic and anaerobic biodegradation via oxygen and carbon equilibrium calculation. And the research got the rates of the natural attenuation and half-life of the oil pollutants byusing the first-order decay model. Based on the analysis, the capability of monitored natural attenuation and the environmental quality were evaluated. The results show that the actual oxygen consumption of contaminated site is less than that needed theoretically in aerobic degradation of all pollutants, while the amount of CO2 detected is far less than that in the aerobic degradation by theoretical formation. And the half-life of petroleum contaminants in contaminated site is about 50 days. The analysis indicated that: (1) The ways of natural attenuation were proved as both aerobic and anaerobic biodegradation; (2) The contamination of the BTEX tested by the fist-step experiment fell below the environmental standard level after about 250 days' natural attenuation, which means the environmental risk in this gas station had been eliminated and the control measures could be removed.
authors.affiliation: China International Engineering Consulting Corporation, Beijing 100048. jiah05@mails.tsinghua.edu.cn
authors.forename: Hui
authors.initials: H
authors.lastname: Jia
authors.forename: Xiao-Feng
authors.initials: XF
authors.lastname: Wu
authors.forename: Li-Ming
authors.initials: LM
authors.lastname: Hu
authors.forename: Pei-Bin
authors.initials: PB
authors.lastname: Liu
mesh_terms: D001554:Benzene / Q000032:analysis; D001673:Biodegradation, Environmental; D002681:China; D004784:Environmental Monitoring / Q000379:methods*; D010578:Petroleum / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis*; D055549:Volatile Organic Compounds / Q000032:analysis*; D014992:Xylenes / Q000032:analysis
chemical_list: D010578:Petroleum; D012989:Soil Pollutants; D055549:Volatile Organic Compounds; D014992:Xylenes; D001554:Benzene