Dissolved organic matter accelerates microbial degradation of 17 alpha-ethinylestradiol in the presence of iron mineral.

Autor: He H; Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China., Shi M; Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China., Yang X; Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China., Zhan J; Research Institute for Environmental Innovation (Suzhou) Tsinghua, Suzhou 215163, China. Electronic address: juhong.zhan@tsinghua-riet.com., Lin Y; Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China., Guo Z; Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China., Liao Z; Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China., Lai C; Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China., Ren X; Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China., Huang B; Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China; Yunnan Provincial Key Lab of Soil Carbon Sequestration and Pollution Control, Kunming 650500, China. Electronic address: huangbin@kust.edu.cn., Pan X; Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China; Yunnan Provincial Key Lab of Soil Carbon Sequestration and Pollution Control, Kunming 650500, China.
Jazyk: angličtina
Zdroj: Journal of environmental sciences (China) [J Environ Sci (China)] 2024 May; Vol. 139, pp. 364-376. Date of Electronic Publication: 2023 Jun 07.
DOI: 10.1016/j.jes.2023.05.042
Abstrakt: Dissolved organic matter (DOM) and iron minerals widely existing in the natural aquatic environment can mediate the migration and transformation of organic pollutants. However, the mechanism of interaction between DOM and iron minerals in the microbial degradation of pollutants deserves further investigation. In this study, the mechanism of 17 alpha-ethinylestradiol (EE2) biodegradation mediated by humic acid (HA) and three kinds of iron minerals (goethite, magnetite, and pyrite) was investigated. The results found that HA and iron minerals significantly accelerated the biodegradation process of EE2, and the highest degradation efficiency of EE2 (48%) was observed in the HA-mediated microbial system with pyrite under aerobic conditions. Furthermore, it had been demonstrated that hydroxyl radicals (HO•) was the main active substance responsible for the microbial degradation of EE2. HO• is primarily generated through the reaction between hydrogen peroxide secreted by microorganisms and Fe(II), with aerobic conditions being more conducive. The presence of iron minerals and HA could change the microbial communities in the EE2 biodegradation system. These findings provide new information for exploring the migration and transformation of pollutants by microorganisms in iron-rich environments.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this article.
(Copyright © 2023. Published by Elsevier B.V.)
Databáze: MEDLINE
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