共存离子对EK/PRB联合修复砷污染土壤的影响

纪冬丽, 张竞, 孟凡生, 王业耀. 共存离子对EK/PRB联合修复砷污染土壤的影响[J]. 环境工程学报, 2018, 12(1): 172-177. doi: 10.12030/j.cjee.201703133
引用本文: 纪冬丽, 张竞, 孟凡生, 王业耀. 共存离子对EK/PRB联合修复砷污染土壤的影响[J]. 环境工程学报, 2018, 12(1): 172-177. doi: 10.12030/j.cjee.201703133
JI Dongli, ZHANG Jing, MENG Fansheng, WANG Yeyao. Interference of coexistence ions on arsenic removal from soil by electrokinetic process coupled with permeable reaction barrier[J]. Chinese Journal of Environmental Engineering, 2018, 12(1): 172-177. doi: 10.12030/j.cjee.201703133
Citation: JI Dongli, ZHANG Jing, MENG Fansheng, WANG Yeyao. Interference of coexistence ions on arsenic removal from soil by electrokinetic process coupled with permeable reaction barrier[J]. Chinese Journal of Environmental Engineering, 2018, 12(1): 172-177. doi: 10.12030/j.cjee.201703133

共存离子对EK/PRB联合修复砷污染土壤的影响

  • 基金项目:

    国家自然科学基金资助项目(51308520)

Interference of coexistence ions on arsenic removal from soil by electrokinetic process coupled with permeable reaction barrier

  • Fund Project:
  • 摘要: 以砷含量为500 mg·kg-1的模拟土壤为研究对象,采用电动/渗透性反应格栅(EK/PRB)联合技术对土壤中的砷进行去除。研究土壤共存离子Fe3+、Ca2+、Al3+、HCO-3、NO-3和PO3-4等的影响下电流密度、土壤pH分布、砷残余量的变化,重点研究土壤中不同形态砷之间的迁移转化规律。结果表明:添加共存离子后,土壤砷残余量增加,去除效率降低,由68%降低到41%;土壤电流密度变化幅度增加,由3 mA·cm-2在24 h后升高到9.5 mA·cm-2,然后在12 h内迅速下降,最后稳定在0.6 mA·cm-2;pH变化幅度增加,变化趋势未发生变化,均是靠近阴极侧呈碱性,靠近阳极侧呈酸性;土壤中砷残渣态由11.98%升高到39.81%,残渣态的升高是土壤中砷去除率降低的原因。
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出版历程
  • 刊出日期:  2018-01-14

共存离子对EK/PRB联合修复砷污染土壤的影响

  • 1. 天津城建大学环境与市政工程学院,天津 300384
  • 2. 天津地质调查中心,天津 300170
  • 3. 中国环境科学研究院,北京 100012
  • 4. 中国环境监测总站,北京 100012
基金项目:

国家自然科学基金资助项目(51308520)

摘要: 以砷含量为500 mg·kg-1的模拟土壤为研究对象,采用电动/渗透性反应格栅(EK/PRB)联合技术对土壤中的砷进行去除。研究土壤共存离子Fe3+、Ca2+、Al3+、HCO-3、NO-3和PO3-4等的影响下电流密度、土壤pH分布、砷残余量的变化,重点研究土壤中不同形态砷之间的迁移转化规律。结果表明:添加共存离子后,土壤砷残余量增加,去除效率降低,由68%降低到41%;土壤电流密度变化幅度增加,由3 mA·cm-2在24 h后升高到9.5 mA·cm-2,然后在12 h内迅速下降,最后稳定在0.6 mA·cm-2;pH变化幅度增加,变化趋势未发生变化,均是靠近阴极侧呈碱性,靠近阳极侧呈酸性;土壤中砷残渣态由11.98%升高到39.81%,残渣态的升高是土壤中砷去除率降低的原因。

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