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DOI | 10.1111/gwmr.12187 |
Effect of Biofuels on Biodegradation of Benzene and Toluene at Gasoline Spill Sites | |
Wilson, John T.1; Adair, Cherri2; White, Hal3; Howard, Robert L.4 | |
发表日期 | 2016-09-01 |
ISSN | 1069-3629 |
卷号 | 36期号:4页码:50-61 |
英文摘要 | The risk that benzene and toluene from spills of gasoline will impact drinking water wells is largely controlled by the natural anaerobic biodegradation of benzene and toluene. Benzene and toluene, as well as ethanol and other biofuels, are degraded under anaerobic conditions to the same pool of degradation products. Biodegradation of biofuels may produce concentrations of degradation products that make the thermodynamics for degradation of benzene and toluene infeasible under methanogenic conditions and produce larger plumes of benzene and toluene. This study evaluated the concentrations of fuel alcohols that are necessary to inhibit the anaerobic degradation of benzene and toluene under methanogenic conditions. At two ethanol spill sites, concentrations of ethanol greater >= 42 mg/L inhibited the anaerobic degradation of toluene. The pH and concentrations of acetate, dissolved inorganic carbon, and molecular hydrogen were used to calculate the Gibbs free energy for the biodegradation of toluene. In general, the anaerobic biodegradation of toluene was not thermodynamically feasible in water with >= 42 mg/L ethanol. In a microcosm study, when the concentrations of ethanol were >= 14 mg/L or the concentrations of n-butanol were >= 16 mg/L, the biodegradation of the alcohols consistently produced concentrations of hydrogen, dissolved inorganic carbon, and acetate that would preclude natural anaerobic biodegradation of benzene and toluene by syntrophic organisms. In contrast, iso-butanol and n-propanol only occasionally produced conditions that would preclude the biodegradation of benzene and toluene. |
语种 | 英语 |
WOS记录号 | WOS:000392736600024 |
来源期刊 | GROUND WATER MONITORING AND REMEDIATION |
来源机构 | 美国环保署 |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/58734 |
作者单位 | 1.Scissortail Environm Solut LLC, 2013 Foster Dr, Ada, OK 74820 USA; 2.US EPA ORD NRMRL GWERD, RS Kerr Ctr Dr, Ada, OK 74820 USA; 3.US EPA OSWER OUST, 1215 Jefferson Davis Highway, Arlington, VA 22202 USA; 4.Blue Ridge Reg Off, Virginia Dept Environm Qual, 3019 Peters Creek Rd, Roanoke, VA 24019 USA |
推荐引用方式 GB/T 7714 | Wilson, John T.,Adair, Cherri,White, Hal,et al. Effect of Biofuels on Biodegradation of Benzene and Toluene at Gasoline Spill Sites[J]. 美国环保署,2016,36(4):50-61. |
APA | Wilson, John T.,Adair, Cherri,White, Hal,&Howard, Robert L..(2016).Effect of Biofuels on Biodegradation of Benzene and Toluene at Gasoline Spill Sites.GROUND WATER MONITORING AND REMEDIATION,36(4),50-61. |
MLA | Wilson, John T.,et al."Effect of Biofuels on Biodegradation of Benzene and Toluene at Gasoline Spill Sites".GROUND WATER MONITORING AND REMEDIATION 36.4(2016):50-61. |
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