콘텐츠 본문
논문 해외 국제전문학술지(SCI급) Remediating zinc-contaminated groundwater with calcium polysulfide using model porous media and simulated groundwater
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2025-07
- 저자명 Jin Chul Joo, Hyeon woo Go, Charles D. Shackelford, Kyoungphile Nam, Hee Sun Moon, Jiwon Choi, Jeongwoo Kim
- 학술지명 Journal of Hazardous Materials
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 7
- 논문 다운로드 링크(외부) https://www.sciencedirect.com/science/article/pii/S030438942500754X
- 연구분야 공학 > 환경공학
논문 초록 (Abstract)
This study demonstrates the feasibility of using calcium polysulfide (CPS) for in-situ redox manipulation (CPS-ISRM) to remediate Zn-contaminated groundwater, focusing on concentrations exceeding 10,000 mg/L at a zinc smelting site in South Korea. Experiments with sand-only and sand-clay columns revealed that subsurface heterogeneity significantly impacts CPS transport, reactivity, and removal efficiency. Homogeneous sand conditions allowed rapid CPS migration and over 99 % Zn removal, albeit within a shorter reactive time frame. In contrast, heterogeneous sand-clay media enabled prolonged localized reactions due to CPS retention, although with less than 50 % Zn removal due to restricted distribution. CPS interactions with groundwater and geochemical constituents varied based on subsurface conditions, influencing permeability and chemical evolution. Precipitation including the formation of ZnS(s) and CaSO4(s) drove localized clogging and changes in hydraulic conductivity, particularly in confined zones of the sand-clay column. These findings highlight the importance of subsurface characterization and tailored CPS injection protocols, considering site-specific factors such as subsurface heterogeneity, groundwater chemistry, and interactions between CPS, groundwater constituents, and the targeted contaminants. Understanding these system dynamics is imperative for optimizing CPS-ISRM technology for field-scale groundwater remediation.
