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• W4323657310 endingPage "162703" @default.
• W4323657310 startingPage "162703" @default.
• W4323657310 abstract "Dissolved organic matter (DOM) in the sediment matrix affects contaminant remediation through consumption of oxidants and binding with contaminants. Yet the change in DOM during remediation processes, particularly during electrokinetic remediation (EKR), remains under-investigated. In this work, we elucidated the fate of sediment DOM in EKR using multiple spectroscopic tools under abiotic and biotic conditions. We found that EKR led to significant electromigration of the alkaline-extractable DOM (AEOM) toward the anode, followed by transformation of the aromatics and mineralization of the polysaccharides. The AEOM remaining in the cathode (largely polysaccharides) was resistant to reductive transformation. Limited difference was noted between abiotic and biotic conditions, indicating the dominance of electrochemical processes when relatively high voltages were applied (1-2 V/cm). The water-extractable organic matter (WEOM), in contrast, showed an increase at both electrodes, which was likely attributable to pH-driven dissociations of humic substances and amino acid-type constituents at the cathode and the anode, respectively. Nitrogen migrated with the AEOM toward the anode, but phosphorus remained immobilized. Understanding the redistribution and transformation of DOM could inform studies on contaminant degradation, carbon and nutrient availability, and sediment structural changes in EKR." @default.
• W4323657310 created "2023-03-10" @default.
• W4323657310 creator A5039726200 @default.
• W4323657310 creator A5073200302 @default.
• W4323657310 date "2023-06-01" @default.
• W4323657310 modified "2023-10-16" @default.
• W4323657310 title "Electrokinetic remediation leads to translocation of dissolved organic matter/nutrients and oxidation of aromatics and polysaccharides" @default.
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• W4323657310 doi "https://doi.org/10.1016/j.scitotenv.2023.162703" @default.
• W4323657310 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36906032" @default.
• W4323657310 hasPublicationYear "2023" @default.
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