Sulfidized Nanoscale Zero-Valent Iron: Tuning the Properties of This Complex Material for Efficient Groundwater Remediation,Accounts of Materials Research

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Sulfidized Nanoscale Zero-Valent Iron: Tuning the Properties of This Complex Material for Efficient Groundwater Remediation
Accounts of Materials Research ( IF 14.0 ) Pub Date : 2021-06-01 , DOI: 10.1021/accountsmr.1c00037
Jiang Xu ₁ , Hao Li ₂ , Gregory V. Lowry ₃

Affiliation

Groundwater contamination by halogenated organic compounds, especially chlorinated and fluorinated ones, threatens freshwater sources globally. Nanoscale zero-valent iron (NZVI) has been extensively studied (>5000 publications) and deployed for in situ groundwater remediation, but NZVI selectivity for contaminants is poor, reactive lifetimes are short, and it cannot promote defluorination reactions. Recently, sulfidized NZVI (SNZVI) has emerged, and has revitalized academic and industrial interests in this material for remediation. Sulfidation broadens the range of reactive contaminants, and significantly increases the selectivity and reactive lifetime of NZVI by 2 orders of magnitude, while inhibiting the undesirable H₂ evolution reaction between Fe⁰ and water. This Account provides a state-of-the-art understanding of the chemical properties controlling the reactivity and selectivity of SNZVI and will advance the field toward the rational design of efficient groundwater remediation materials.

中文翻译：

硫化纳米级零价铁：调整这种复杂材料的特性以有效修复地下水

卤化有机化合物，尤其是氯化和氟化有机化合物对地下水的污染，威胁着全球的淡水资源。纳米零价铁 (NZVI) 已被广泛研究（> 5000 篇出版物）并用于原位地下水修复，但 NZVI 对污染物的选择性差，反应寿命短，不能促进脱氟反应。最近，硫化的 NZVI (SNZVI) 出现了，并重新激发了学术界和工业界对该材料的修复兴趣。硫化作用拓宽了反应污染物的范围，并将 NZVI 的选择性和反应寿命显着提高了 2 个数量级，同时抑制了Fe ⁰之间不希望的 H ₂析出反应。和水。该帐户提供了对控制 SNZVI 反应性和选择性的化学性质的最先进的理解，并将推动该领域朝着高效地下水修复材料的合理设计方向发展。

更新日期：2021-06-25

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