Abstract
Iron-based amorphous alloy (Fe78Si9B13AP) permeability reaction barrier (PRB)-enhanced electrokinetic method (Fe78Si9B13AP-EK) was used to remediate simulated copper-contaminated soil and actual contaminated soil. The results showed that increasing soil moisture content and voltage gradient during remediation could promote the migration of Cu2+ to the cathode. Under the experimental conditions of 40% soil moisture content and 3 V/cm voltage gradient, the removal rate of copper in simulated copper-contaminated soil by Fe78Si9B13AP-EK is higher than that by zero valent iron-enhanced electrokinetic method (ZVI-EK), which could reach 80.32%. The reason is that, the higher reducibility of Fe78Si9B13AP can quickly immobilize Cu2+ that migrates to PRB, which avoids the accumulation of Cu2+ in the cathode. Under the same conditions, the removal rate of copper in actual copper-contaminated soil by Fe78Si9B13AP-EK is 42.37%. The chemical form of residual copper in soil is mainly biounavailable stable state, which effectively reduces the environmental risk of soil.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (NSFC) [Grant Nos. 51661015 and 52061024]; and the Natural Science Foundation of Zhejiang Province [Grant No. LQ20E010002].
Funding
National Natural Science Foundation of China (NSFC) [Grant Nos. 51661015 and 52061024] and Natural Science Foundation of Zhejiang Province [Grant No. LQ20E010002].
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LP and XZ contributed to conceptualization; LP contributed to methodology, software, formal analysis, visualization, investigation, and writing—original draft preparation; LP, ZY, and XZ contributed to validation; XZ contributed to resources and writing—review and editing; and ZY contributed to data curation, funding acquisition, supervision, and project administration. All authors have read and agreed to the published version of the manuscript.
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Pei, L., Zhang, X. & Yuan, Z. Iron-Based Amorphous Alloy Enhanced Electrokinetic Method for Remediation of Copper-Contaminated Soil. Trans Indian Inst Met 76, 2893–2903 (2023). https://doi.org/10.1007/s12666-023-03018-9
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DOI: https://doi.org/10.1007/s12666-023-03018-9