Communication Dans Un Congrès Année : 2024

Heavy metal removal from low permeable contaminated soils using ZVI permeable reactive barrier combined electrokinetics system

Résumé

Heavy metals (HMs) removal from clay soils by conventional soil washing techniques is a challenging process due to the soil low permeability. In this study, removal of copper (Cu) from contaminated clay soil was investigated using electrokinetic (EK) technology coupled with zero-valent iron (ZVI) permeable reactive barrier medium (PRB). Reverse polarity (REK) and pH control (EK-pH) strategies were used to improve the EK performance. According to the result, for a constant electric field (1.0 V.cm-1) applied during 15 days, the pH control strategy (EK- pH) attained a high removal efficiency of 83.7% where the better soil conditions such as stable pH, highest EC (85 mA) and EOF (7.9 mL/d) were observed. However, the best Cu removal efficiency of 84.3% was achieved in the case of polarity reversion (REK) due to the pH stability and equal water movement to the PBR from the two sides. The results of this work suggest a promising technique for effective heavy metal removal from contaminated soil.

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Dates et versions

hal-04572061 , version 1 (10-05-2024)

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  • HAL Id : hal-04572061 , version 1

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Zahra Khodabakhshi Palandi, Mohsen Taghavijeloudar. Heavy metal removal from low permeable contaminated soils using ZVI permeable reactive barrier combined electrokinetics system. The third international congress of civil engineering, architecture, building materials and environment, Feb 2024, Helsinki, Finland. ⟨hal-04572061⟩
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