title: [Effect of the coexistence of chlorobenzene homologue on anaerobic degradation of hexachlorobenzene].
abstract: The anaerobic biodegradation of hexachlorobenzene is being an intensively studied technology for contaminated soil remediation. The effect of three coexisting chlorobenzene homologue (pentachlorobenzene, 1, 2, 4, 5-tetrachlorobenzene and 1, 2, 4-trichlorobenzene) on anaerobic degradation of hexachlorobenzene in dye processing industry contaminated soil was studied under different environmental conditions such as initial pH, reaction temperature and solid-liquid ratio. The result showed that the anaerobic degradation activity of hexachlorobenzene was reduced due to the feedback inhibition caused by accumulation of chlorobenzene homologue. The feedback inhibition and accumulation may vary based on different environmental conditions. Pentachlorobenzene exhibited the strongest inhibitive effect compared to the other two chlorobenzene homologue with low initial pH values, at room temperature and low solid-liquid ratio, respectively. Whereas 1, 2, 4-trichlorobenzene significantly inhibited the degradation with high initial pH values and at higher temperature. As a conclusion, optimization of environmental conditions and reduction of chlorobenzene homologue accumulation in the process can enhance the degradation of hexachorobenzene in contaminated soil.
authors.forename: Qi
authors.initials: Q
authors.lastname: Wang
authors.forename: Hui
authors.initials: H
authors.lastname: Liu
authors.forename: Lin
authors.initials: L
authors.lastname: Jiang
authors.forename: Jun
authors.initials: J
authors.lastname: Tang
mesh_terms: D001673:Biodegradation, Environmental; D002722:Chlorobenzenes / Q000737:chemistry; D006581:Hexachlorobenzene / Q000737:chemistry*; D012989:Soil Pollutants / Q000737:chemistry*
chemical_list: D002722:Chlorobenzenes; D012989:Soil Pollutants; C009947:1,2,4-trichlorobenzene; D006581:Hexachlorobenzene; C018673:1,2,4,5-tetrachlorobenzene; C003060:pentachlorobenzene