title: Influence of humic acid on the trichloroethene degradation by Dehalococcoides-containing consortium.
abstract: By taking an anaerobic Dehalococcoides-containing consortium (designated UC-1) as the research object, the influence of humic acid on the degradation of TCE by UC-1 was examined. The results indicated that (i) TCE was more rapidly degraded in the presence of humic acid compared with the control and the TCE removal efficiencies increased with the increase of concentrations of humic acid; and (ii) at the end of experiments, in the presence of humic acid, much more ethene was produced compared with the control, whereas less VC was accumulated in the medium. Presumably, humic acid improves the activity of organisms in dechlorinating populations resulting in more ethene accumulated in the medium, and (iii) the degradation of TCE stimulated by humic acid by UC-1 might be a biotic process or an abiotic process. Thus, humic acid could influence the degradation of TCE by UC-1 directly via enhancing electron transfer between UC-1 and TCE. This work is a preliminary step for accelerating the degradation of TCE in the groundwater environment using a kind of natural organic matter - humic acid.
authors.affiliation: School of Resources Environment, Northeast Agricultural University, Harbin 150030, PR China.
authors.forename: Miao
authors.initials: M
authors.lastname: Hu
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhang
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Wang
authors.forename: Zhao
authors.initials: Z
authors.lastname: Jiang
authors.forename: Juan
authors.initials: J
authors.lastname: Li
mesh_terms: D001421:Bacteria, Anaerobic / Q000378:metabolism*; D001673:Biodegradation, Environmental; D006812:Humic Substances; D059013:Microbial Consortia; D014241:Trichloroethylene / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000378:metabolism
chemical_list: D006812:Humic Substances; D014874:Water Pollutants, Chemical; D014241:Trichloroethylene