title: Combination of hydrodechlorination and biodegradation for the abatement of chlorophenols.
abstract: A method for abatement for chlorophenols (CPs) in contaminated water based on successive steps of catalytic hydrodechlorination (HDC) over Pd/C at ambient temperature and pressure, followed by aerobic biodegradation using yeast Candida tropicalis (C. tropicalis) was studied. The results showed that 4-chlorophenol (4-CP) and 2,4-dichlorophenol (2,4-DCP) could be easily and completely dechlorinated under mild conditions, ultimately yielding phenol as product. Subsequently, phenol (0-900 mg L(-1)) could be completely degraded by C. tropicalis within 30 h. Moreover, during the biodegradation of phenol, definite mass of ethanol (≤0.5%) caused a modest increase in the duration of the lag phase, but led to a great increase in the maximum degradation rates. This means that CPs with higher concentration could be efficiently detoxified under mild conditions by a combination of HDC and biodegradation in water or water-ethanol systems.
authors.affiliation: Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China. swzhou@yic.ac.cn
authors.forename: Shiwei
authors.initials: S
authors.lastname: Zhou
authors.forename: Xin
authors.initials: X
authors.lastname: Jin
authors.forename: Feifei
authors.initials: F
authors.lastname: Sun
authors.forename: Hao
authors.initials: H
authors.lastname: Zhou
authors.forename: Cuiyun
authors.initials: C
authors.lastname: Yang
authors.forename: Chuanhai
authors.initials: C
authors.lastname: Xia
mesh_terms: D001673:Biodegradation, Environmental; D002384:Catalysis; D002713:Chlorine / Q000737:chemistry*; D002733:Chlorophenols / Q000737:chemistry / Q000378:metabolism*; D007220:Industrial Waste; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000378:metabolism*; D018508:Water Purification / Q000379:methods
chemical_list: D002733:Chlorophenols; D007220:Industrial Waste; D014874:Water Pollutants, Chemical; D002713:Chlorine