title: An approach to assess ecological risk for polycyclic aromatic hydrocarbons (PAHs) in surface water from Tianjin.
abstract: Three approaches were applied and compared to evaluate additive toxic effects of eight PAHs to aquatic organisms in rivers in the Tianjin area. Although the toxicity of the studied PAH compounds did not significantly increase the risk to aquatic organisms, the results of all three approaches indicated that the additive effect of the eight PAHs was significantly stronger than any individual compound acting alone, which indicated the applicability of the approaches. Further, of the compounds studied, anthracene was the major contributor to the overall toxic effect of the mixture. The calculated geometric means of the hazard quotient for the additive effect varied from 0.00055 to 0.00062, compared to the hazard quotient of individual PAHs which ranged from 5.1 x 10-6 to 0.00053. The hazard quotient distribution geometric mean was 0.00058, with 95% of the quotient between 6.6 x 10-5 and 0.051. Overlapping areas varied from 0.00015 to 0.02 for individual PAHs and was 0.03 for additive toxicity.
authors.affiliation: Laboratory for Earth Surface Processes, College of Environmental Sciences, Peking University, Beijing, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Yang
authors.forename: Xuan
authors.initials: X
authors.lastname: Shi
authors.forename: P K
authors.initials: PK
authors.lastname: Wong
authors.forename: Richard
authors.initials: R
authors.lastname: Dawson
authors.forename: Fuliu
authors.initials: F
authors.lastname: Xu
authors.forename: Wenxin
authors.initials: W
authors.lastname: Liu
authors.forename: Shu
authors.initials: S
authors.lastname: Tao
mesh_terms: D000818:Animals; D002681:China; D004357:Drug Synergism; D004463:Ecology; D004784:Environmental Monitoring / Q000706:statistics & numerical data; D056890:Eukaryota / Q000187:drug effects; D005399:Fishes / Q000254:growth & development; D005618:Fresh Water / Q000032:analysis*; D007448:Invertebrates / Q000187:drug effects; D007928:Lethal Dose 50; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis / Q000633:toxicity; D018570:Risk Assessment; D016008:Statistical Distributions; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000633:toxicity
chemical_list: D011084:Polycyclic Aromatic Hydrocarbons; D014874:Water Pollutants, Chemical