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Hydroxyl radical formation upon dark oxidation of reduced iron minerals: Effects of iron species and environmental factors
Zhu, Ailing1; Guo, Yingying1,2; Liu, Guangliang3; Song, Maoyong1,2; Liang, Yong; Cai, Yong1,2,3; Yin, Yongguang1,2
2019-12-01
Source PublicationCHINESE CHEMICAL LETTERS
ISSN1001-8417
Volume30Issue:12Pages:2241-2244
AbstractDark 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.
Department环境化学与生态毒理学国家重点实验室
KeywordReduced iron minerals Hydroxyl radical Dark oxidation Mackinawite Dissolved organic matter
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/42549
Collection环境化学与生态毒理学国家重点实验室
Affiliation1.Jianghan Univ, Inst Environm & Hlth, Wuhan 430056, Peoples R China
2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China
3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Lab Environm Nanotechnol & Hlth Effect, Beijing 100085, Peoples R China
4.Florida Int Univ, Dept Chem & Biochem, Miami, FL 33199 USA
Recommended Citation
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.
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