东北大学学报:自然科学版 ›› 2020, Vol. 41 ›› Issue (2): 265-269.DOI: 10.12068/j.issn.1005-3026.2020.02.020

• 资源与土木工程 • 上一篇    下一篇

蔗糖改性纳米铁对六价铬污染的模拟修复

崔健1,2, 王恩德1, 周睿3, 王长琪2   

  1. (1. 东北大学 资源与土木工程学院, 辽宁 沈阳110819; 2. 中国地质调查局 沈阳地质调查中心, 辽宁 沈阳110032;3. 吉林大学 地下水资源与环境教育部重点实验室, 吉林 长春130021)
  • 收稿日期:2019-03-27 修回日期:2019-03-27 出版日期:2020-02-15 发布日期:2020-03-06
  • 通讯作者: 崔健
  • 作者简介:崔健(1980-),男,辽宁沈阳人,东北大学博士研究生,沈阳地质调查中心教授级高工; 王恩德(1957-),男,辽宁盖州人,东北大学教授,博士生导师.
  • 基金资助:
    中国地质调查局地质调查项目(DD 20189711).

Simulated Remediation for Cr(Ⅵ) Pollution with Sucrose-Modified Nanoscale Zero Valent Iron

CUI Jian1,2, WANG En-de1, ZHOU Rui3, WANG Chang-qi2   

  1. 1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China; 2. Shenyang Center of Geological Survey, China Geological Survey, Shenyang 110032, China; 3. Key Laboratory of Groundwater Resources and Environment
  • Received:2019-03-27 Revised:2019-03-27 Online:2020-02-15 Published:2020-03-06
  • Contact: WANG En-de
  • About author:-
  • Supported by:
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摘要: 在二维模拟装置中进行改性纳米铁原位修复模拟,观察是否形成原位反应带,并研究反应带对六价铬高浓度污染的修复效能.模拟实验结果表明:在六价铬污染晕中注入大量的蔗糖改性纳米铁浆液,可以形成有效的反应带.反应带对于高浓度六价铬的修复效能在最初的30 min内最好,六价铬去除效率达到91%;在4h以后至反应的第187h,去除率稳定保持在60%,且形成了较大面积的有效修复区域.反应带中六价铬还原后的产物为三价铬,且生成的三价铬可能在中性或偏碱性环境中自然形成沉淀.

关键词: 污染修复, 纳米零价铁, 原位反应带, 六价铬去除, 模拟修复

Abstract: In order to observe whether an in-situ reactive zone is formed and study the remediation efficiency for high concentration of Cr(Ⅵ) pollution, the in-situ reactive zone of modified nanosale zero valent iron was created in a two-dimensional simulation trough. The results of simulated experiments showed that a large amount of sucrose-modified nano-iron slurry is injected to form an effective reaction zone in the Cr(Ⅵ) pollution halo. The recovery efficiency of the reaction zone for high concentration of Cr(Ⅵ) is the best in the first 30 minutes, and the Cr(Ⅵ) removing efficiency is 91%. The removal rate remains at 60% stably after 4 hours to 187 hours of the reaction, with a large area of effective repair area formed. The Cr(Ⅵ) in the reaction zone is reduced by Cr(Ⅲ), and the formed Cr(Ⅲ) may naturally form a precipitate in a neutral or alkaline environment.

Key words: objective, interval particle, intervalpollution remediation, nanoscale zero valent iron, in-situ reactive zone, Cr(Ⅵ) removing, simulated remediation

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