Journal
ENVIRONMENTAL POLLUTION
Volume 265, Issue PT A, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2020.114913
Keywords
PAEs; Seasonal and spatial variations; Yangtze river estuary; Risk evaluation
Categories
Funding
- National Key Research and Development Program of China [2016YFA0601300]
- National Natural Science Foundation of China [41830534, 41976038]
- Natural Science Foundation of Ningbo [2019A610447]
- General Scientific Research Project of Department of Education of Zhejiang Province [Y201940917]
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Spatiotemporal variability in seawater, spatial variation in sediment, pollution characteristics, and risks related to 16 phthalate esters (PAEs) were investigated in the Yangtze River estuary and its adjacent East China Sea. The total concentrations of EPAEs in surface water were 0.588-17.7 mu g L-1 in summer, 2.63-22.9 mu g L-1 in winter, and 1.93-20.7 mu g L(-1 )in spring, with average values of 2.05,10.2, and 4.89 mu g L-1, respectively. PAE concentrations exhibited notable seasonal variations with the highest value in winter and the lowest value in summer. The seasonal variation in PAE concentrations may be influenced by runoff and diluted water from the Yangtze River. The chemical composition of PAEs showed that di-n-butyl phthalate (DnBP), diisobutyl phthalate (DiBP), and di(2-ethylhexyl) phthalate (DEHP) had significantly higher (p < 0.05) concentrations than the other congeners and were the most abundant PAE species in sediment and seawater in all three seasons. In addition, DnBP and DiBP were the two main congeners in seawater, and DEHP concentrations were higher in sediment than in seawater. DEHP had higher potential risks to sensitive organisms in water environment than DnBP and DiBP, and DiBP and DnBP which presented high levels of risk in sedimentary environment. DMP and DEP in watery and sedimentary environments and DEHP in sedimentary environment showed no or low risks to sensitive organisms. (C) 2020 Elsevier Ltd. All rights reserved.
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