Simultaneous oxidation of Mn (Ⅱ) and As (Ⅲ) on cupric oxide (CuO) promotes As (Ⅲ) removal at circumneutral pH

作     者：Lingqun Zeng Biao Wan Qian Wang Yupeng Yan Yuanzhi Tang Xionghan Feng Lingqun Zeng;Biao Wan;Qian Wang;Yupeng Yan;Yuanzhi Tang;Xionghan Feng

作者机构：State Environmental Protection Key Laboratory of Soil Health and Green RemediationCollege of Resources and EnvironmentHuazhong Agricultural UniversityWuhan 430070China School of Earth and Atmospheric SciencesGeorgia Institute of TechnologyAtlantaGA 30332-0340USA Department of Environmental and Sustainable EngineeringUniversity at AlbanySUNY1400 Washington AvenueAlbanyNY 12222USA GeomicrobiologyCenter for Applied GeosciencesUniversity of Tuebingen72076 TuebingenGermany. Key Laboratory of Poyang Lake Watershed Agricultural Resources and Ecology of Jiangxi ProvinceCollege of Land Resources and EnvironmentJiangxi Agricultural UniversityNanchang 330045China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2023年第125卷第3期

页      面：691-700页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：supported by the National Natural Science Foundation of China (Nos. 42030709, 42167031) the National Key Research and Development Program of China (No. 2017YFD0200201) Y.T. acknowledges support by the U.S. National Science Foundation (NSF) under Grant No. 2108688 

主　　题：Simultaneous oxidation Mn(II) As(III) CuO Metal oxides 

摘      要：Oxidation of Mn (Ⅱ) or As(Ⅲ) by molecular oxygen is slow at pH9,while they can be catalytically oxidized in the presence of oxide minerals and then removed from contaminated ***,the reaction mechanisms on simultaneous oxidation of Mn(Ⅱ) and As (Ⅲ)on oxide mineral surface and their accompanied removal efficiency remain *** study compared Mn (Ⅱ) oxidation on four common metal oxides (γ-Al_(2)O_(3),CuO,α-Fe2O_(3)and ZnO) and investigated the simultaneous oxidation and removal of Mn (Ⅱ) and As (Ⅲ) through batch experiments and spectroscopic *** the tested oxides,CuO and α-Fe2O_(3)possess greater catalytic activity toward Mn (Ⅱ) *** and removal kinetics of Mn (Ⅱ) and As (Ⅲ) on CuO indicate that O_(2)is the terminal electron acceptor for Mn (Ⅱ) and As (Ⅲ) oxidation on CuO,and Mn (Ⅱ) acts as an electron shuttle to promote As (Ⅲ) oxidation and *** main oxidized product of Mn (Ⅱ) on CuO is high-valent MnO_(x)*** newly formed Mn (Ⅲ) or Mn (IV) phases promote As (Ⅲ) oxidation on CuO at circumneutral pH 8 and is reduced to Mn (Ⅱ),which may be then released into *** study provides new insights into metal oxide-catalyzed oxidation of pollutants Mn (Ⅱ) and As (Ⅲ) and suggests that CuO should be considered as an efficient material to remediate Mn (Ⅱ) and As(Ⅲ)contamination.