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The mechanism for promoted oxygenation of V(IV) by goethite: Positive effect of surface hydroxyl groups
Hu, Xingyun; Peng, Xianjia; Kong, Linghao; Zhu, Feng
2019-05-05
Source PublicationJOURNAL OF HAZARDOUS MATERIALS
ISSN0304-3894
Volume369Pages:254-260
AbstractThe most toxic and mobile form of vanadium (V) is V(V). Thus, the oxidation of V is a subject of considerable importance since the process may increase environmental risks of V. V(IV) is known to be stable when pH < 4.5. However, in this study, stable V(IV) was oxidized almost completely in goethite suspension within 60 min at pH 2.0 and pH 4.0, correspondingly, only 25%-30% and 15%-20% of V(IV) were oxidized in equimolar Fe3+ solution and the blank solution, respectively. The promoted oxidation of V(IV) by FeOOH is attributed to the formation of the complex, VO(OFe <)+ or VO(OFe <)2. On the one hand, the formation of the complex caused higher pH in the interface of solid FeOOH and corresponding lower conditional potential of V (V)/V(IV) than those in bulk solutions, which facilitates the oxidation of V(IV). On the other hand, the surface group OFe < may serve as a medium that facilitating the electron transfer from V(IV) ions to dissolved oxygen molecules, also favoring the oxidation of V(IV). This study not only deepens our understanding of the transfer, transformation, and risk of V in environments, but also provides a reference to speculate the fate of similar elements in environments.
Department中国科学院饮用水科学与技术重点实验室
KeywordVanadium Oxidation Goethite Surface hydroxyl groups
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/43537
Collection中国科学院饮用水科学与技术重点实验室
Affiliation1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China
2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing Key Lab Ind Wastewater Treatment & Resour, Beijing 100085, Peoples R China
3.Univ Chinese Acad Sci, Coll Resource & Environm, Beijing 100049, Peoples R China
4.Nanjing Univ Informat Sci & Technol, Sch Environm Sci & Engn, Nanjing 210044, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Hu, Xingyun,Peng, Xianjia,Kong, Linghao,et al. The mechanism for promoted oxygenation of V(IV) by goethite: Positive effect of surface hydroxyl groups[J]. JOURNAL OF HAZARDOUS MATERIALS,2019,369:254-260.
APA Hu, Xingyun,Peng, Xianjia,Kong, Linghao,&Zhu, Feng.(2019).The mechanism for promoted oxygenation of V(IV) by goethite: Positive effect of surface hydroxyl groups.JOURNAL OF HAZARDOUS MATERIALS,369,254-260.
MLA Hu, Xingyun,et al."The mechanism for promoted oxygenation of V(IV) by goethite: Positive effect of surface hydroxyl groups".JOURNAL OF HAZARDOUS MATERIALS 369(2019):254-260.
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