Panthi, Gayatri 최재영 Jeong, Seung-Woo 2024-01-19T14:00:54Z 2024-01-19T14:00:54Z 2022-01-25 2021-09 2076-3417 https://pubs.kist.re.kr/handle/201004/116496 Arsenic in the soil can leach into groundwater and contaminate drinking water, posing a serious risk to human health. The stabilization of arsenic in contaminated soil is one of the immobilization technologies used to remediate contaminated lands. However, few studies have evaluated the long-term release of As and pH changes in stabilized soils. We compared different stabilization techniques in the field by mixing contaminated soil with 5% of either acid mine drainage sludge (AMDS), coal mine drainage sludge (CMDS), steel slag, or cement. We evaluated the results using an up-flow percolation column test to observe any pH changes and As releases from the stabilized soils up to a liquid-solid (L/S) ratio of 50 (approximately representing a 50 year period). At the initial stage of percolation (at an L/S ratio of 0.2 or 0.2 of a year of exposure), some alkaline components and any incompletely bound As in the soils washed out with the eluent. The pH of the cement-stabilized soil was approximately 12 throughout the experiment (up to 50 L/S). Adding stabilizers to the soil reduced As leaching by 54-81% (overall efficiency) compared to the control (contaminated soil only). The order of stabilization efficiency was: steel slag (55.0%) < AMDS (74.3%) < cement (78.1%) < CMDS (81.5%). This study suggests that the groundwater of the stabilized soil should be carefully monitored for the initial five years because the soluble ionic species can leach over this period. English MDPI Evaluation of Long-Term Leaching of Arsenic from Arsenic Contaminated and Stabilized Soil Using the Percolation Column Test Article 10.3390/app11177859 1 APPLIED SCIENCES-BASEL, v.11, no.17 APPLIED SCIENCES-BASEL 11 17 Y scie scopus 000694139900001 2-s2.0-85114110164 Chemistry, Multidisciplinary Engineering, Multidisciplinary Materials Science, Multidisciplinary Physics, Applied Chemistry Engineering Materials Science Physics Article ROAD CONSTRUCTION BOTTOM ASH PH INCINERATION PERFORMANCE BEHAVIOR As-contaminated soil stabilization percolation test L S ratio TCLP leaching