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Hydroxyl radical formation upon dark oxidation of reduced iron minerals: Effects of iron species and environmental factors
Authors:Ailing Zhu  Yingying Guo  Guangliang Liu  Maoyong Song  Yong Liang  Yong Cai  Yongguang Yin
Institution:1. Institute of Environment and Health, Jianghan University, Wuhan 430056, China;2. State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;3. Laboratory of Environmental Nanotechnology and Health Effect, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;4. Department of Chemistry and Biochemistry, Florida International University, Miami, FL 33199, United States
Abstract: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.  /></sup>OH production was generally observed from the oxidation of reduced iron minerals, following the order: mackinawite (FeS) > reduced nontronite (iron-bearing smectite clay) > pyrite (FeS<sub>2</sub>) > siderite (FeCO<sub>3</sub>). Structural Fe<sup>2+</sup> and dissolved O<sub>2</sub> play critical roles in <sup><img style=
Keywords:Corresponding author at: Institute of Environment and Health  Jianghan University  Wuhan 430056  China    Reduced iron minerals  Hydroxyl radical  Dark oxidation  Mackinawite  Dissolved organic matter
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