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

Yidan Zhang, Edward J. O'Loughlin, Man Jae Kwon

Research output: Contribution to journalReview articlepeer-review

16 Citations (Scopus)

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.

Original languageEnglish
Article number128607
JournalJournal of hazardous materials
Volume431
DOIs
Publication statusPublished - 2022 Jun 5

Bibliographical note

Funding Information:
This work was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2021R1A2C1006165) and by the Korea Environmental Industry & Technology Institute (KEITI) through the Subsurface Environment Management Project, funded by Korea's Ministry of Environment (grant number 2018002440002). MJK was partly supported by the Korea University Grant. EJO was supported in part by the Wetlands Hydrobiogeochemistry Scientific Focus Area (SFA) at Argonne National Laboratory which is supported by the Environmental System Science Program, Office of Biological and Environmental Research (BER), Office of Science, U.S. Department of Energy (DOE), under contract DE-AC02- 06CH11357.

Funding Information:
This work was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education ( 2021R1A2C1006165 ) and by the Korea Environmental Industry & Technology Institute (KEITI) through the Subsurface Environment Management Project, funded by Korea’s Ministry of Environment (grant number 2018002440002 ). MJK was partly supported by the Korea University Grant. EJO was supported in part by the Wetlands Hydrobiogeochemistry Scientific Focus Area (SFA) at Argonne National Laboratory which is supported by the Environmental System Science Program , Office of Biological and Environmental Research (BER), Office of Science, U.S. Department of Energy (DOE), under contract DE-AC02- 06CH11357 .

Publisher Copyright:
© 2022 Elsevier B.V.

Keywords

  • Abiotic Sb redox processes
  • Biotic Sb redox processes
  • Sb biogeochemistry
  • Sb toxicity

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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