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Chromium biogeochemical behaviour in soil-plant systems and remediation strategies: A critical review
Journal of Hazardous Materials ( IF 13.6 ) Pub Date : 2021-09-15 , DOI: 10.1016/j.jhazmat.2021.127233
Ming Ao 1 , Xiaoting Chen 1 , Tenghaobo Deng 2 , Shengsheng Sun 1 , Yetao Tang 3 , Jean Louis Morel 4 , Rongliang Qiu 5 , Shizhong Wang 3
Affiliation  

Chromium (Cr) is a toxic heavy metal that is heavily discharged into the soil environment due to its widespread use and mining. High Cr levels may pose toxic hazards to plants, animals and humans, and thus have attracted global attention. Recently, much progress has been made in elucidating the mechanisms of Cr uptake, transport and accumulation in soil-plant systems, aiming to reduce the toxicity and ecological risk of Cr in soil; however, these topics have not been critically reviewed and summarised to date. Accordingly, based on available data—especially from the last five years (2017–2021)—this review traces a plausible link among Cr sources, levels, chemical forms, and phytoavailability in soil; Cr accumulation and translocation in plants; and Cr phytotoxicity and detoxification in plants. Additionally, given the toxicity and hazard posed by Cr(VI) in soils and the application of reductant materials to reduce Cr(VI) to Cr(III) for the remediation of Cr(VI)-contaminated soils, the reduction and immobilisation mechanisms by organic and inorganic reductants are summarised. Finally, some priority research challenges concerning the biogeochemical behaviour of Cr in soil-plant systems are highlighted, as well as the environmental impacts resulting from the application of reductive materials and potential research prospects.



中文翻译:

土壤-植物系统中铬的生物地球化学行为和修复策略:批判性综述

铬 (Cr) 是一种有毒重金属,由于其广泛使用和开采,大量排放到土壤环境中。高铬含量可能对植物、动物和人类造成毒性危害,因此引起了全球的关注。近年来,在阐明Cr在土壤-植物系统中的吸收、转运和积累机制方面取得了很大进展,旨在降低Cr在土壤中的毒性和生态风险;然而,迄今为止,这些主题尚未经过严格审查和总结。因此,根据现有数据——尤其是过去五年(2017-2021 年)的数据——本综述追溯了土壤中 Cr 来源、水平、化学形式和植物有效性之间的合理联系;Cr在植物中的积累和转运;和 Cr 在植物中的植物毒性和解毒作用。此外,鉴于 Cr(VI) 在土壤中造成的毒性和危害,以及在修复受 Cr(VI) 污染的土壤中使用还原剂材料将 Cr(VI) 还原为 Cr(III),有机和总结了无机还原剂。最后,重点介绍了有关 Cr 在土壤-植物系统中的生物地球化学行为的一些优先研究挑战,以及还原材料的应用对环境的影响和潜在的研究前景。

更新日期:2021-09-28
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