Lead (II) Removal from Contaminated Soils by Electrokinetic Remediation Coupled with Modified Eggshell Waste

André Ribeiro; André Mota; Margarida Soares; Carlos Castro; Jorge Araújo; Joana Carvalho

doi:10.4028/www.scientific.net/KEM.777.256

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Lead (II) Removal from Contaminated Soils by Electrokinetic Remediation Coupled with Modified Eggshell Waste

Abstract:

Electrokinetic remediation deserves particular attention in soil treatment due to its peculiar advantages, including the capability of treating fine and low permeability materials, and achieving consolidation, dewatering and removal of salts and inorganic contaminants like heavy metals in a single stage. In this study, the remediation of artificially lead (II) contaminated soil by electrokinetic process, coupled with Eggshell Inorganic Fraction Powder (EGGIF) permeable reactive barrier (PRB), was investigated. An electric field of 2 V cm^-1was applied and was used an EGGIF/soil ratio of 30 g kg^-1 of contaminated soil for the preparation of the permeable reactive barrier (PRB) in each test. It was obtained high removal rates of lead in both experiments, especially near the cathode. In the normalized distance to cathode of 0.2 it was achieved a maximum removal rate of lead (II) of 68, 78 and 83% in initial lead (II) concentration of 500 mg^-1, 200 mg^-1 and 100 mg^-1, respectively. EGGIF (Eggshell Inorganic Fraction) proved that can be used as permeable reactive barrier (PRB) since in all the performed tests were achieved adsorptions yields higher than 90%.

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Key Engineering Materials (Volume 777)

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256-261

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.777.256

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Online since:

August 2018

Authors:

André Ribeiro*, André Mota, Margarida Soares, Carlos Castro, Jorge Araújo, Joana Carvalho

Keywords:

Eggshell Inorganic Fraction Powder (EGGIF), Electrokinetic Remediation, Lead (II), Low-Cost Adsorbent, Permeable Reactive Barrier (PRB)

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