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Synergistic multiple active species driven fast estrone oxidation by δ-MnO in the existence of methanol. | LitMetric

Synergistic multiple active species driven fast estrone oxidation by δ-MnO in the existence of methanol.

Sci Total Environ

Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Ocean Science and Technology, Panjin Campus, Dalian University of Technology, China. Electronic address:

Published: March 2021

AI Article Synopsis

Article Abstract

Endocrine-disrupting chemicals (EDCs) cause serious threats to human health. Five types of MnO were synthesized and characterized. They exhibited different removal performances for three EDCs, i.e., estrone (E1), ethynylestradiol (EE2) and bisphenol A (BPA). Only δ-MnO can completely remove E1 within 120 min at pH 3.0. Free Mn (III) was determined at the beginning of the reaction and participated in the EDCs removal process. Electron spin resonance (ESR) indicated that δ-MnO could produce superoxide anions (·O) and singlet oxygen (O) in the existence of methanol. The reactive oxygen species (ROS) quenching experiments showed O have certain contribution to the E1 removal by δ-MnO. The source of ROS is mainly the lattice oxygen from δ-MnO, and can be replenished through the layer structure destruction caused by the reaction between Mn(III) and E1. The ROS dependent EDCs removal by δ-MnO leads to a deep understanding on this well-known oxidant.

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Source
http://dx.doi.org/10.1016/j.scitotenv.2020.143201DOI Listing

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