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湿法解毒还原工艺对铬渣中Cr(Ⅵ)的治理特性

陈窈君 李来顺 吕正勇 闵玉涛

陈窈君, 李来顺, 吕正勇, 闵玉涛. 湿法解毒还原工艺对铬渣中Cr(Ⅵ)的治理特性[J]. 环境工程, 2020, 38(6): 67-74. doi: 10.13205/j.hjgc.202006011
引用本文: 陈窈君, 李来顺, 吕正勇, 闵玉涛. 湿法解毒还原工艺对铬渣中Cr(Ⅵ)的治理特性[J]. 环境工程, 2020, 38(6): 67-74. doi: 10.13205/j.hjgc.202006011
CHEN Yao-jun, LI Lai-shun, LV Zheng-yong, MIN Yu-tao. RESEARCH ON WET DETOXIFICATION TECHNOLOGY OF CHROMITE ORE PROCESSING RESIDUE[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(6): 67-74. doi: 10.13205/j.hjgc.202006011
Citation: CHEN Yao-jun, LI Lai-shun, LV Zheng-yong, MIN Yu-tao. RESEARCH ON WET DETOXIFICATION TECHNOLOGY OF CHROMITE ORE PROCESSING RESIDUE[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(6): 67-74. doi: 10.13205/j.hjgc.202006011

湿法解毒还原工艺对铬渣中Cr(Ⅵ)的治理特性

doi: 10.13205/j.hjgc.202006011
基金项目: 

国家重点研发计划资助项目(2018YFC1802200,2018YFC1802205)。

详细信息
    作者简介:

    陈窈君(1994-),女,硕士,主要研究方向为土壤和地下水修复。chenyj2419@bgechina.cn

    通讯作者:

    李来顺(1989-),男,硕士,主要研究方向为土壤和地下水修复。lilaishun@bgechina.cn

RESEARCH ON WET DETOXIFICATION TECHNOLOGY OF CHROMITE ORE PROCESSING RESIDUE

  • 摘要: 以治理铬渣中的Cr(Ⅵ)污染为目的,提出了硫酸浸出-硫酸亚铁还原的铬渣湿法解毒工艺,在对铬渣处理前后的表面形貌进行表征的基础上,探究了不同处理条件下铬渣中Cr(Ⅵ)的处理效果及其修复机理。结果表明:铬渣湿法球磨时间为20 min时,铬渣颗粒98.68%过200目筛,水溶性Cr(Ⅵ)的浸出率可达40.96%;铬渣硫酸添加量为60%,液固比为4∶1,酸溶时间为2.5 h时,Cr(Ⅵ)浸出趋于饱和,此时浸出终点pH为5.8,水溶性和酸溶性Cr(Ⅵ)总浸出率为95.38%;硫酸亚铁添加量为40%时,铬渣中Cr(Ⅵ)含量下降为1.38 mg/kg。铬渣中Cr(Ⅵ)的去除主要与硫酸对含Cr(Ⅵ)矿物的溶解、SO42-和CrO42-的离子交换以及Fe(Ⅱ)对溶液中Cr(Ⅵ)的还原作用有关。
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  • 收稿日期:  2020-03-28

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