Hydroxyl radical formation upon dark oxidation of reduced iron minerals: Effects of iron species and environmental factors

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Hydroxyl radical formation upon dark oxidation of reduced iron minerals: Effects of iron species and environmental factors
	Zhu, Ailing 4; Guo, Yingying 3,4; Liu, Guangliang 2; Song, Maoyong 3,4; Liang, Yong ; Cai, Yong 2,3,4; Yin, Yongguang 3,4
刊名	CHINESE CHEMICAL LETTERS
	2019-12-01
卷号	30 期号:12 页码:2241-2244
关键词	Reduced iron minerals Hydroxyl radical Dark oxidation Mackinawite Dissolved organic matter
ISSN号	1001-8417
英文摘要	Dark formation of hydroxyl radical upon oxidation of reduced iron minerals plays an important role in the degradation and transformation of organic and inorganic pollutants. Herein, we compared the hydroxyl radical formation from various reduced iron minerals at different redox conditions. (OH)-O-center dot production was generally observed from the oxidation of reduced iron minerals, following the order: mackinawite (FeS) > reduced nontronite (iron-bearing smectite clay) > pyrite (FeS2) > siderite (FeCO3). Structural Fe2+ and dissolved O-2 play critical roles in OH production from reduced iron minerals. (OH)-O-center dot production increases with decreasing pH, and Cl- has little effect on this process. More importantly, dissolved organic matter significantly enhances (OH)-O-center dot production, especially under O-2 purging, highlighting the importance of this process in ambient environments. This sunlight-independent pathway in which (OH)-O-center dot forms during oxidation of reduced iron minerals is helpful for understanding the degradation and transformation of various inorganic and organic pollutants in the redox-fluctuation environments. (C) 2019 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/42549]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
作者单位	1.Florida Int Univ, Dept Chem & Biochem, Miami, FL 33199 USA 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Lab Environm Nanotechnol & Hlth Effect, Beijing 100085, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China 4.Jianghan Univ, Inst Environm & Hlth, Wuhan 430056, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Ailing,Guo, Yingying,Liu, Guangliang,et al. Hydroxyl radical formation upon dark oxidation of reduced iron minerals: Effects of iron species and environmental factors[J]. CHINESE CHEMICAL LETTERS,2019,30(12):2241-2244.
APA	Zhu, Ailing.,Guo, Yingying.,Liu, Guangliang.,Song, Maoyong.,Liang, Yong.,...&Yin, Yongguang.(2019).Hydroxyl radical formation upon dark oxidation of reduced iron minerals: Effects of iron species and environmental factors.CHINESE CHEMICAL LETTERS,30(12),2241-2244.
MLA	Zhu, Ailing,et al."Hydroxyl radical formation upon dark oxidation of reduced iron minerals: Effects of iron species and environmental factors".CHINESE CHEMICAL LETTERS 30.12(2019):2241-2244.