Journal
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
Volume 171, Issue -, Pages 564-570Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2019.01.001
Keywords
Phthalate esters (PAEs); Exposure concentration; Species sensitivity distribution (SSD); Ecological risk assessment; Taihu Lake basin
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Funding
- Major Science and Technology Program for Water Pollution Control and Treatment (China) [2017ZX07301002]
- National Natural Science Foundation of China (China) [41521003]
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The environmental spatial distribution and exposure risk of 6 phthalate esters (PAEs) including dimethyl phthalate (DMP), diethyl phthalate (DEP), butyl benzyl phthalate (BBP), di-n-octyl phthalate (DnOP), bis(2-ethylhexyl) phthalate (DEHP), and dibutyl phthalate (DBP), in surface water and sediment of Taihu Lake basin, China, were investigated at 65 sites. The exposure concentrations of 6 PAEs (Sigma 6PAEs) detected in the samples spanned a range of 0.740-13.0 mu g/L in surface water and 5.15-20.9 mg/kg in sediment. DBP and DEHP were the predominant compounds in surface water, with mean concentrations of 1.59 mu g/L and 1.29 mu g/L, respectively. DnOP was the predominant compound in sediment with mean concentration of 7.41 mg/kg. Ecological risk assessment was conducted by the hazard quotient method in which the predicted no effect concentration (PNEC) was derived from the species sensitivity distribution (SSD) curve. The results showed that DEHP in water phase posed a higher environmental risk than the other PAEs, while the DEP in sediment posed a high risk to the aquatic system. The study contributed to better understanding the presence of PAEs in Taihu Lake basin and provided valuable information for managing and controlling PAEs pollution.
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