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分散铁硫基纳米浆料的制备及其在Cr(Ⅵ)污染修复中的应用

邢宁宁 张红玲 蒋慧 徐红彬

邢宁宁, 张红玲, 蒋慧, 徐红彬. 分散铁硫基纳米浆料的制备及其在Cr(Ⅵ)污染修复中的应用[J]. 环境工程, 2026, 44(6): 101-112. doi: 10.13205/j.hjgc.202606011
引用本文: 邢宁宁, 张红玲, 蒋慧, 徐红彬. 分散铁硫基纳米浆料的制备及其在Cr(Ⅵ)污染修复中的应用[J]. 环境工程, 2026, 44(6): 101-112. doi: 10.13205/j.hjgc.202606011
XING Ningning, ZHANG Hongling, JIANG Hui, XU Hongbin. Preparation of dispersed iron-sulfur-based nanoparticle slurry and its application in remediating Cr(Ⅵ) contamination[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(6): 101-112. doi: 10.13205/j.hjgc.202606011
Citation: XING Ningning, ZHANG Hongling, JIANG Hui, XU Hongbin. Preparation of dispersed iron-sulfur-based nanoparticle slurry and its application in remediating Cr(Ⅵ) contamination[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(6): 101-112. doi: 10.13205/j.hjgc.202606011

分散铁硫基纳米浆料的制备及其在Cr(Ⅵ)污染修复中的应用

doi: 10.13205/j.hjgc.202606011
基金项目: 

国家自然科学基金面上项目(52174282)

详细信息
    作者简介:

    邢宁宁(1999-),女,博士研究生,主要研究方向为功能材料。xingningning@ipe.ac.cn

    通讯作者:

    张红玲(1985-),女,副研究员,主要研究方向为功能材料,化工冶金产品工程。hlzhang@ipe.ac.cn

Preparation of dispersed iron-sulfur-based nanoparticle slurry and its application in remediating Cr(Ⅵ) contamination

  • 摘要: 针对铬化工行业铬铁矿浸出渣(铬渣)及关联铬污染土壤等固相介质中的六价铬[Cr(Ⅵ)]污染治理难题,开发了一种具有分散稳定特性的铁硫基浆料(dispersedly stabilized iron-sulfur-based slurry,DSS-ISB)。该浆料利用无机分散剂改性,有效提高了铁硫基纳米颗粒的悬浮稳定性和界面活性,所得浆料粒径约200 nm,可在无需调节pH的条件下高效还原固定Cr(Ⅵ)。优化实验确定的最佳工艺参数为:液固比5 mL∶10 g和DSS-ISB投加量1.8 mg/g。在此条件下,DSS-ISB对Cr(Ⅵ)的去除率达97%以上,处理前后铬渣浸出液中Cr(Ⅵ)浓度由15.03 mg/L降至0.03 mg/L,远低于GB 5085.3—2007《危险废物鉴别标准 浸出毒性鉴别》限值(5 mg/L)。由X射线光电子能谱(XPS)与比表面积(BET)表征分析结果可知,DSS-ISB通过化学还原(Fe2+/S2-双电子供体)与表面吸附协同作用的修复机制,有效将毒性Cr(Ⅵ)转化为较为稳定的Cr(Ⅲ)形态。在相同修复标准下,与传统还原剂硫酸亚铁(FeSO4)和硫化钠(Na2S)相比,DSS-ISB的去除效率分别提升28.24%、6.23%;单位质量去除容量增加92.43%、77.08%。同时,铬渣处理的药剂成本降至36.40元/t,较FeSO4(55.00元/t)和Na2S(49.20元/t)分别节约33.82%和26.02%。此外,DSS-ISB修复过程无需pH调节及后续钝化处理,修复流程简化。DSS-ISB既可用于铬化工行业铬渣的还原解毒,又可应用于Cr(Ⅵ)污染土壤的原位还原修复,为Cr(Ⅵ)污染的绿色治理提供经济高效的解决方案。
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  • 收稿日期:  2025-05-30
  • 录用日期:  2025-07-12
  • 修回日期:  2025-06-20
  • 网络出版日期:  2026-07-06

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