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Antimony release and volatilization from rice paddy soils: Field and microcosm study
Jaime N. Caplette; L. Gfeller; D. Lei; J. Liao; J. Xia; H. Zhang; X. Feng; A. Mestrot
2022
发表期刊Science of the Total Environment
卷号842页码:156631
摘要

The fate of antimony (Sb) in submerged soils and the impact of common agricultural practices (e.g., manuring) on Sb release and volatilization is understudied. We investigated porewater Sb release and volatilization in the field and laboratory for three rice paddy soils. In the field study, the porewater Sb concentration (up to 107.1 μg L−1 ) was associated with iron (Fe) at two sites, and with pH, Fe, manganese (Mn), and sulfate (SO4 2−) at one site. The surface water Sb concentrations (up to 495.3 ± 113.7 μg L−1 ) were up to 99 times higher than the regulatory values indicating a potential risk to aquaculture and rice agriculture. For the first time, volatile Sb was detected in rice paddy fields using a validated quantitative method (18.1 ± 5.2 to 217.9 ± 160.7 mg ha−1 y−1 ). We also investigated the influence of two common rice agriculture practices (flooding and manuring) on Sb release and volatilization in a 56-day microcosm experiment using the same soils from the field campaign. Flooding induced an immediate, but temporary, Sb release into the porewater that declined with SO4 2−, indicating that SO4 2− reduction may reduce porewater Sb concentrations. A secondary Sb release, corresponding to Fe reduction in the porewater, was observed in some of the microcosms. Our results suggest flooding-induced Sb release into rice paddy porewaters is temporary but relevant. Manuring the soils did not impact the porewater Sb concentration but did enhance Sb volatilization. Volatile Sb (159.6 ± 108.4 to 2237.5 ± 679.7 ng kg−1 y−1 ) was detected in most of the treatments and was correlated with the surface water Sb concentration. Our study indicates that Sb volatilization could be occurring at the soil-water interface or directly in the surface water and highlights that future works should investigate this potentially relevant mechanism.

关键词Rice Paddy Xikuangshan Manure Sulfate Reduction Volatile Antimony Flooding
DOI10.1016/j.scitotenv.2022.156631
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收录类别SCI
语种英语
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被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/13461
专题环境地球化学国家重点实验室
作者单位1.Institute of Geography, University of Bern, Switzerland
2.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, PR China
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GB/T 7714
Jaime N. Caplette,L. Gfeller,D. Lei,et al. Antimony release and volatilization from rice paddy soils: Field and microcosm study[J]. Science of the Total Environment,2022,842:156631.
APA Jaime N. Caplette.,L. Gfeller.,D. Lei.,J. Liao.,J. Xia.,...&A. Mestrot.(2022).Antimony release and volatilization from rice paddy soils: Field and microcosm study.Science of the Total Environment,842,156631.
MLA Jaime N. Caplette,et al."Antimony release and volatilization from rice paddy soils: Field and microcosm study".Science of the Total Environment 842(2022):156631.
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