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Multi-dimensional micro-nano scale manganese oxide catalysts induced chemical-based advanced oxidation processes (AOPs) in environmental applications: A critical review by Lin Lin; Junsen Wang; Zhifang Zhao; Jiayi Zhu; Aikeyidanmu Zhamaerding; Lingyun Feng; Dan Yang; Lite Meng; Chuanshu He; Wenbing Wang; Yunhui Zhang; Wei Jin is a Engineering article available to read on EtoBox.

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As transition metal oxides, manganese oxides (MnO x ) have emerged as a potent activator in various advanced oxidation processes (AOPs) for the removal of recalcitrant pollutants from the environment. This article systematically reviewed the activation performance and mechanisms of various MnO x catalysts in typical chemicalbased AOPs, and summarized the practical applications. This review covers a wide range of MnO x with different origins (natural, synthetic and biogenic MnO x ), dimensions (1D to 3D), sizes (nm to mm), crystallinity, structures (mainly α-MnO 2 , β-MnO 2 , δ-MnO 2 , γ-MnO 2 and λ-MnO 2 ), Mn valences (mainly + 2, +3 and + 4) and contents. The relation between MnO x properties and their activation roles was attempted to explore. The activation mechanisms and resulting radical and non-radical pathways in different MnO x -based AOPs for pollutant removal were investigated and compared in detail. The effects of crucial experimental parameters, e.g., pH, temperature, co-existing anions and organic matter, on contaminant degradation were assessed and explained. The practical applications of MnO x -induced AOPs are currently limited and focused on groundwater and soil r

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Author

Lin Lin; Junsen Wang; Zhifang Zhao; Jiayi Zhu; Aikeyidanmu Zhamaerding; Lingyun Feng; Dan Yang; Lite Meng; Chuanshu He; Wenbing Wang; Yunhui Zhang; Wei Jin

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)