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Toxicity of benzophenone-3 and its biodegradation in a freshwater microalga Scenedesmus obliquus

Title
Toxicity of benzophenone-3 and its biodegradation in a freshwater microalga Scenedesmus obliquus
Author
전병훈
Keywords
Microalgae; Biodegradation; Benzonphenone-3; UVfilters; Toxicity
Issue Date
2020-05
Publisher
ELSEVIER
Citation
JOURNAL OF HAZARDOUS MATERIALS, v. 389, article no. 122149
Abstract
Environmental contamination by benzophenone-3 has gained attention because of its frequent occurrence and adverse environmental impact. Studies investigating the toxicity and removal mechanisms, along with its degradation pathway in microalgae are still rare. In this study, the ecotoxicity of benzophenone-3 on Scenedesmus obliquus was assessed through dose-response test, risk quotient evaluation, and changes of microalgal biochemical characteristics and gene expression. The calculated risk quotients of benzophenone-3 were˃ 1, implying its high environmental risk. Expression of the ATPF0C and Tas genes encoding ATP-synthase and oxidoreductase was significantly increased in S. obliquus after exposure to benzophenone-3, while that of Lhcb1 and HydA genes was reduced. When exposed to 0.1-3 mg L-1 benzophenone-3, 23-29 % removal was achieved by S. obliquus, which was induced by abiotic removal, bioadsorption, bioaccumulation and biodegradation. Metabolic fate analyses showed that biodegradation of benzophenone-3 was induced by hydroxylation, and methylation, forming less toxic intermediates according to the toxicity assessment of the identified products. This study provides a better understanding of the toxicity and metabolic mechanisms of benzophenone-3 in microalgae, demonstrating the potential application of microalgae in the remediation of benzophenone-3 contaminated wastewater.
URI
https://www.sciencedirect.com/science/article/pii/S0304389420301370?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/166517
ISSN
0304-3894; 1873-3336
DOI
10.1016/j.jhazmat.2020.122149
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > EARTH RESOURCES AND ENVIRONMENTAL ENGINEERING(자원환경공학과) > Articles
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