Open Access

ARTICLE

Remediation of Cu Contaminated Soil by Fe₇₈Si₉B₁₃^AP Permeability Reaction Barrier Combined with Electrokinetic Method

by Liefei Pei^1,2, Xiangyun Zhang¹, Zizhou Yuan^1,*

1 School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, China
2 School of Mining and Metallurgy Engineering, Baiyin Mining and Metallurgy Vocational and Technical College, Baiyin, China

* Corresponding Author: Zizhou Yuan. Email:

Journal of Renewable Materials 2023, 11(6), 2969-2983. https://doi.org/10.32604/jrm.2023.025760

Received 29 July 2022; Accepted 26 September 2022; Issue published 27 April 2023

Abstract

Iron-based amorphous crystalline powder Fe₇₈Si₉B₁₃^AP is used as a permeability reaction barrier (PRB) combined with an electrokinetic method (EK-PRB) to study the removal rate of Cu in contaminated soil. After treating Cucontaminated soil for 5 days under different voltage gradients and soil water content, the soil pH is between 3.1 and 7.2. The increase of voltage gradient and soil water content can effectively promote the movement of Cu²⁺ to the cathode. The voltage gradient is 3 V/cm, and the water content of 40% is considered to be an optional experimental condition. Therefore, under this condition, the effects of Fe₇₈Si₉B₁₃^AP and zero-valent iron (ZVI) as PRB on the removal rate of total Cu in soil and the transformation of chemical forms of Cu are studied. Compared with ZVI, Fe₇₈Si₉B₁₃^AP as PRB has a better remediation effect. EK-Fe₇₈Si₉B₁₃^AP can remove 80.3% of total Cu in soil, and the biologically available Cu is reduced to 3.6%, which effectively reduces the environmental risk of contaminated soil.

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Keywords

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