Electrodialytic Remediation of Soil Fines (<63μm) in Suspension: Influence of Current Strength and L/S.

Research output: Contribution to journalJournal articleResearchpeer-review

209 Downloads (Pure)

Abstract

Current treatment of the remaining soil fines from soil wash is onerous and expensive, and therefore, in this work, we investigated the feasibility of electrodialytic remediation (EDR) as an alternative treatment. The study focuses on EDR efficiency as a function of current strength, liquid-to-solid-ratio (L/S), pH and time. We found out that during the experiments, Pb was easily dissolved by the acidification resulting from water splitting at the anion-exchange membrane. When higher currents and/or higher L/S ratios were applied, it was found that water splitting occurring at the cation-exchange membrane increased the pH, and this resulted in decreased remediation efficiency. It was shown that complete remediation of the soil-fines is possible, with the majority of the Pb being transported into the catholyte and precipitated at the cathode. Based on the results it is recommended that EDR is implemented using a number of reactors in series, where the initial reactor works at the highest possible removal rate, and the final reactor works at the target Pb-concentration.
Original languageEnglish
JournalElectrochimica Acta
Volume52
Pages (from-to)3412-3419
ISSN0013-4686
DOIs
Publication statusPublished - 2007

Fingerprint

Dive into the research topics of 'Electrodialytic Remediation of Soil Fines (<63μm) in Suspension: Influence of Current Strength and L/S.'. Together they form a unique fingerprint.

Cite this