title: Effect of copper(II) on biodegradation of benzo[a]pyrene by Stenotrophomonas maltophilia.
abstract: Benzo[a]pyrene (BaP) biodegradation by Stenotrophomonas maltophilia was studied under the influence of co-existed Cu(II) ions. About 45% degradation was achieved within 3d when dealing with 1 mg L(-1) BaP under initial natural pH at 30 °C; degradation reached 48% in 2 d at 35 °C. Efficacy of BaP biodegradation reached the highest point at pH 4. In the presence of 10 mg L(-1) Cu(II) ions, the BaP removal ratio was 45% on 7th day, and maintained stable from 7 to 14 d at 30 °C under natural pH. The favorable temperature and pH for BaP removal was 25 °C and 6.0 respectively, when Cu(II) ions coexisted in the solutions. Experiments on cometabolism indicated that S. maltophilia performed best when sucrose was used as an additional carbon source. GC-MS analysis revealed that the five rings of BaP opened, producing compounds with one or two rings which were more bioavailable.
authors.affiliation: Department of Environmental Engineering, Jinan University, Guangzhou 510632, PR China.
authors.forename: Shuona
authors.initials: S
authors.lastname: Chen
authors.forename: Hua
authors.initials: H
authors.lastname: Yin
authors.forename: Jinshao
authors.initials: J
authors.lastname: Ye
authors.forename: Hui
authors.initials: H
authors.lastname: Peng
authors.forename: Na
authors.initials: N
authors.lastname: Zhang
authors.forename: Baoyan
authors.initials: B
authors.lastname: He
mesh_terms: D001564:Benzo(a)pyrene / Q000032:analysis / Q000378:metabolism*; D001673:Biodegradation, Environmental; D003300:Copper / Q000633:toxicity*; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism / Q000633:toxicity*; D020615:Stenotrophomonas maltophilia / Q000187:drug effects / Q000378:metabolism*; D013696:Temperature
chemical_list: D012989:Soil Pollutants; D001564:Benzo(a)pyrene; D003300:Copper