ENVIRONMENTAL OCCURRENCE AND ECOLOGICAL RISK ASSESSMENT OF PARABENS AND METABOLITES IN THE DONGJIANG RIVER
Parabens are widely used as preservatives in the production of food,cosmetics,pharmaceuticals,and industrial products.However,as a group of emerging endocrine disruptor,parabens can be bioaccumulated in aquatic organisms,thus posing threat to the ecosystem and human health.In this study,we investigated the occurrence and distribution of parabens in the surface water and sediments of the Dongjiang River,and assessed the potential ecological risk it may pose.The results showed that the concentrations of total parabens in the surface water ranged from 1.17 ng/L to 17.07 ng/L.The concentrations of parabens in sediments ranged from 19.0 ng/g to 765.959 ng/g.Meanwhile,the average content of parabens in the water column and sediment of Xizhijiang(XZJ)was higher,3.62 ng/L and 155.99 ng/g,respectively.Among the parabens and metabolites measured,MeP and 4-HB were the respective major parent compound and metabolite.The levels of different types of parent parabens also showed variability in different regions,which may be related to different consumption habits of food,drugs,and cosmetics.The risk assessment showed that the ecological risk of parabens in the Dongjiang River was low,but long-term exposure may cause greater harmful effects on the ecosystem.The results of the study provide scientific support for the risk assessment and environmental management of parabens.
the Dongjiang Riverparabensrisk assessmentenvironmental managementsediment
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