title: Soil moisture could enhance electrokinetic remediation of arsenic-contaminated soil.
abstract: Electrokinetic remediation (EKR) is the most efficient technique for remediation of fine-grained soil. The primary removal mechanisms of heavy metal in EKR are the electromigration and electroosmosis flow under appropriate electric gradients. Most EKR studies have researched the variation according to the electrolyte and electric voltage. Also, EKR could be influenced by the migration velocity of ions, while few studies have investigated the effect of moisture content. In this study, soil moisture was controlled by using tap water and NaOH as electrolytes to enhance electromigration and electroosmosis flow. In both electrolytes, the higher moisture content led to the more As removal efficiency, but there were no differences between tap water and NaOH. Therefore, tap water was the most cost-effective electrolyte to remove As from fine-grained soil.
authors.affiliation: Department of Environmental Engineering and Soil Environment Research Center, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonbuk, 54896, Republic of Korea.
authors.forename: Su-Yeon
authors.initials: SY
authors.lastname: Shin
authors.affiliation: Department of Environmental Engineering and Soil Environment Research Center, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonbuk, 54896, Republic of Korea.
authors.forename: Sang-Min
authors.initials: SM
authors.lastname: Park
authors.affiliation: Department of Environmental Engineering and Soil Environment Research Center, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonbuk, 54896, Republic of Korea. kbaek@jbnu.ac.kr.|Department of Bioactive Material Sciences, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonbuk, 54896, Republic of Korea. kbaek@jbnu.ac.kr.
authors.forename: Kitae
authors.identifier: http://orcid.org/0000-0002-7976-6484
authors.initials: K
authors.lastname: Baek
mesh_terms: D001151:Arsenic; D004563:Electrochemistry; D004787:Environmental Pollution; D052918:Environmental Restoration and Remediation; D007700:Kinetics; D012987:Soil; D012989:Soil Pollutants
chemical_list: D012987:Soil; D012989:Soil Pollutants; D001151:Arsenic
keywords: Electrolyte; Electromigration; Electroosmosis flow; Pretreatment; Zeta potential