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[Spatial Distribution Characteristics and Risk Assessment of Polychlorinated Biphenyls (PCBs) in Sediments and Soils from the Dishui Lake and Its River System].
Wang, Xue-Ping; Huang, Xing; Bi, Chun-Juan; Jia, Jin-Pu; Guo, Xue; Chen, Zhen-Lou.
Afiliação
  • Wang XP; School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China.
  • Huang X; State Key Laboratory of Estuarine and Coastal Research, Institute of Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China.
  • Bi CJ; School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China.
  • Jia JP; School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China.
  • Guo X; School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China.
  • Chen ZL; School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China.
Huan Jing Ke Xue ; 37(6): 2121-2130, 2016 Jun 08.
Article em Zh | MEDLINE | ID: mdl-29964877
ABSTRACT
In order to investigate the pollution levels of PCBs in urban artificial lake, fourteen PCB congeners in sediments and soils of Dishui Lake and its river system were quantified by GC/MS, and then the distributions, sources and ecological risk of PCBs were discussed. The results showed that the concentrations of ∑14 PCBs in sediments and soils ranged from 0.65-16.41 ng·g-1 (dry weight, dw) and 0.47-1.27 ng·g-1, respectively, which were at a low level in general. Higher concentrations of PCBs were found in surface sediments from the river system of Dishui Lake than those in surface and core sediments from Dishui Lake, which indicated that the sediments in Dishui Lake would be polluted by the river system in the process of diversion. The concentrations of PCBs in core sediments decreased with depth, which showed that the sediments of Dishui Lake had been polluted by PCBs since its completion. In all samples, Tetra-CBs and Penta-CBs accounted for 20.65% and 67.12% of ∑14 PCBs, respectively, and PCB105, PCB118 and PCB77 were the dominant compounds. The results of source apportionment by principal component analysis (PCA) indicated that PCBs in sediments and soils from Dishui Lake and its river system were influenced by the historical cumulative emissions of 2#, 1# PCBs used in China and municipal solid waste incineration and combustion sources. The toxic equivalents (TEQs) of 12 (DL-PCBs) ranged from 0.01-79.40 pg·g-1, and the TEQs in 7 samples of surface sediments from Dishui Lake and its river system were beyond the interim sediments quality guidelines (ISQGs) suggested by USEPA, which would result in potential eco-toxicological risks for aquatic organisms.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Poluentes do Solo / Poluentes Químicos da Água / Monitoramento Ambiental / Bifenilos Policlorados / Sedimentos Geológicos Tipo de estudo: Etiology_studies / Risk_factors_studies País como assunto: Asia Idioma: Zh Ano de publicação: 2016 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Poluentes do Solo / Poluentes Químicos da Água / Monitoramento Ambiental / Bifenilos Policlorados / Sedimentos Geológicos Tipo de estudo: Etiology_studies / Risk_factors_studies País como assunto: Asia Idioma: Zh Ano de publicação: 2016 Tipo de documento: Article