Bioaccumulation and Biomagnification of 2-Ethylhexyl-4-dimethylaminobenzoate in Aquatic Animals

Guanghua Lu, Ranran Zhou, Sheng Li, Tianjian Dang and Jianchao Liu
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Guanghua Lu: Water Conservancy Project and Civil Engineering College, Tibet Agriculture and Animal Husbandry University, Linzhi 860000, China
Ranran Zhou: Key Laboratory for Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
Sheng Li: Jiangsu SinoRoad Engineering Research Institute Co., LTD, Nanjing 211806, China
Tianjian Dang: Water Conservancy Project and Civil Engineering College, Tibet Agriculture and Animal Husbandry University, Linzhi 860000, China
Jianchao Liu: Key Laboratory for Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China

IJERPH, 2018, vol. 15, issue 11, 1-11

Abstract: 2-Ethylhexyl-4-dimethylaminobenzoate (EHDAB) is a commonly used organic ultraviolet filter. The bioaccumulation and biomagnification of EHDAB were investigated in two aquatic animals, the larvae of midge ( Chironomus riparius ) and crucian carp ( Carassius carassius ), and the metabolic enzyme responses in fish liver were determined. EHDAB in the larvae of midge reached a steady state within 10 days of sediment exposure. The biota-sediment accumulation factors ranged from 0.10 to 0.54, and were inversely proportional to the exposure concentrations. The EHDAB-contaminated larvae were used to feed the crucian carp. Within 28 days of feeding exposure, the EHDAB levels in fish tissues gradually increased with the increase of the exposure concentration, exhibiting an apparent concentration-dependence and time-dependence. The liver and kidneys were the main organs of accumulation, and the biomagnification factors of EHDAB ranged from 8.97 to 11.0 and 6.44 to 10.8, respectively. In addition, EHDAB significantly increased the activities of cytochrome P450 (CYP) 1A, CYP3A and glutathione S-transferase in the fish liver. Our results indicate that EHDAB may pose a risk of biomagnification in an aquatic environment and influence the biological processes of exposed organisms.

Keywords: UV filter; biomagnification; dietary exposure; aquatic animal; cytochrome P450 (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2018
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