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Remediation of heavy metal-polluted soils using organic acid washing
Author(s): LIANG Jinli, CAI Huanxing, DUAN Xuemei, DAI Xuanli, YU Yijun
Pages: 3339-
3343
Year: 2012
Issue:
9
Journal: Techniques and Equipment for Environmental Pollution Control
Keyword: organic acid; column leaching; heavy metal; polluted soil; remediation;
Abstract: 通过室内模拟实验,采用土柱淋洗方法,研究草酸、柠檬酸、乙酸和酒石酸溶液对某电镀厂附近土壤中重金属的去除效果。探讨了淋洗剂浓度、淋洗次数和淋洗时间等对淋洗效果的影响,研究草酸淋洗前后土壤中重金属形态的变化。结果表明,淋洗过程中铬的去除效果明显滞后于铜、锌和镍3种重金属离子。1 mol/L的草酸在土水比为1∶1,淋洗5h,淋洗4次的条件下可以达到最佳淋洗效果,Cu、Zn、Ni和Cr的去除率分别是99.6%、66.98%、88.7%和18.23%。
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