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Antimony redox processes in the environment: A critical review of associated oxidants and reductants

Authors
Zhang, Y.O'Loughlin, E.J.Kwon, M.J.
Issue Date
6월-2022
Publisher
Elsevier B.V.
Keywords
Abiotic Sb redox processes; Biotic Sb redox processes; Sb biogeochemistry; Sb toxicity
Citation
Journal of Hazardous Materials, v.431
Indexed
SCIE
SCOPUS
Journal Title
Journal of Hazardous Materials
Volume
431
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/140174
DOI
10.1016/j.jhazmat.2022.128607
ISSN
0304-3894
Abstract
The environmental behavior of antimony (Sb) has recently received greater attention due to the increasing global use of Sb in a range of industrial applications. Although present at trace levels in most natural systems, elevated Sb concentrations in aquatic and terrestrial environments may result from anthropogenic activities. The mobility and toxicity of Sb largely depend on its speciation, which is dependent to a large extent on its oxidation state. To a certain extent, our understanding of the environmental behavior of Sb has been informed by studies of the environmental behavior of arsenic (As), as Sb and As have somewhat similar chemical properties. However, recently it has become evident that the speciation of Sb and As, especially in the context of redox reactions, may be fundamentally different. Therefore, it is crucial to study the biogeochemical processes impacting Sb redox transformations to understand the behavior of Sb in natural and engineered environments. Currently, there is a growing body of literature involving the speciation, mobility, toxicity, and remediation of Sb, and several reviews on these general topics are available; however, a comprehensive review focused on Sb environmental redox chemistry is lacking. This paper provides a review of research conducted within the past two decades examining the redox chemistry of Sb in aquatic and terrestrial environments and identifies knowledge gaps that need to be addressed to develop a better understanding of Sb biogeochemistry for improved management of Sb in natural and engineered systems. © 2022 Elsevier B.V.
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