title: [Study on benzene degraded by soil microorganism].
abstract: The experiments were made in laboratory to analyze the characteristics and principle of benzene's biodegradation using the microorganism (G-, Flavobacterium) taken from Daqing oil fields. Results show that the maximal concentration of benzene, which microorganisms could endure is between 8.8 mg x L(-1) and 17.6 mg x L(-1); microorganisms were inhibited as benzene's concentration was beyond 17.6 mg x L(-1). Trends of benzene's concentration in and out of microorganism's cell are almost same; the biodegradation could be achieved efficiently as the pH range of 6.5 - 7.0 and benzene initial concentration range of 7.04 - 13.2 mg x L(-1). Change of - lgP (P is the distributive ratio of benzene in membrane and water) could be illustrated the trends of toxicity and degradation of benzene in and out of microorganism's cell; the biodegradation rate varied simultaneously with the change of P as initial concentration of benzene was beyond 8.8 mg x L(-1).
authors.affiliation: State Key Laboratory of Environment Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing 100875, China. murphylzu@sohu.com
authors.forename: Xiao-xiao
authors.initials: XX
authors.lastname: Zhang
authors.forename: Hong-qi
authors.initials: HQ
authors.lastname: Wang
authors.forename: Jing-qi
authors.initials: JQ
authors.lastname: Liu
authors.forename: Zhi-hua
authors.initials: ZH
authors.lastname: Yao
authors.forename: Yan-jun
authors.initials: YJ
authors.lastname: Chen
mesh_terms: D001419:Bacteria / Q000378:metabolism*; D001554:Benzene / Q000378:metabolism*; D001673:Biodegradation, Environmental; D005417:Flavobacterium / Q000378:metabolism; D006090:Gram-Negative Bacteria / Q000378:metabolism; D012987:Soil / Q000032:analysis*; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000378:metabolism*
chemical_list: D012987:Soil; D012989:Soil Pollutants; D001554:Benzene