Distribution and bioaccumulation characteristics of organophosphate esters in the Yellow river estuary
Organophosphate esters(OPEs),as a widely used commercial chemical,have been found in various environmental media and show persistence and multiple toxicity.In this study,the Yellow River estuary was selected as the research area,and a total of 17 OPEs were detected in surface water,sediment,plankton,and 12 types of aquatic organisms.Among them,chlorinated-OPEs had the highest detection abundance and frequency,which were the main pollutant components,followed by alkyl-and aryl-OPEs.Pollution sources of chlorinated-OPEs were more extensive in the homology analysis of OPEs in surface water and sediment.And the concentrations of ΣOPEs in wild fish with higher trophic level(such as Hypophthalmichthys molitrix,Carassius auratus,Sphyraenus,etc.)were higher than those in benthos with lower trophic level(such as Macrobrachium nipponense,etc.)among 12 aquatic organisms,indicating that the distribution of OPEs in aquatic food chain was bioaccumulative and species specificity.In addition,compared to gill absorption in fish,intestinal feeding was the main exposure pathway for OPEs pollution in wild fish.It was further found that some OPEs showed certain bioaccumulation and biomagnification potential in the aquatic food web from the Yellow River estuary.Tri(1,3-dichloroisopropyl)phosphate existed potential low ecological risks,to which should be paid more attention.The research results provide a scientific and reasonable theoretical basis for the risk management of emerging contaminant(OPEs)in the future.
organophosphate estersYellow river estuarybioaccumulationbiomagnificationecological risk
万方数据
维普
