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논문 국내 국내전문학술지(KCI급) Optimal Injection Dosage Determination of Calcium polysulfide (CPS) for Remediation of Groundwater Contaminated with Complex Heavy Metals with Various Concentration Ranges
- 학술지 구분 국내전문학술지(KCI급)
- 게재년월 2024-11
- 저자명 최지원, 주진철, 남경필, 고현우, 박원석, 이인원, 김동준
- 학술지명 Soil Groundwater Environ
- 발행처명 한국지하수토양환경학회
- 발행국가 국내
- 논문언어 한국어
- 전체저자수 7
- 논문 다운로드 링크(외부) https://www.kci.go.kr/kciportal/ci/sereArticleSearch/ciSereArtiView.kci?sereArticleSearchBean.artiId=ART003160577
- 연구분야 공학 > 환경공학
첨부 파일
논문 초록 (Abstract)
ABSTRACT
This study assessed the optimal injection dosage of calcium polysulfide (CPS) for the remediation of groundwater contaminated with cadmium (Cd) and zinc (Zn) at varying concentrations. CPS, a powerful reducing agent, was applied to groundwater samples from two contaminated sites with high and low heavy metal levels. Increasing CPS dosage resulted in higher pH and lower oxidation-reduction potential (ORP). In the high-concentration sample, a CPS dosage of 0.3% achieved over 99% removal of Cd and Zn, with CPS/heavy metal mass ratios of 2.29 for Cd and 3.13 for Zn. In the low-concentration sample, CPS dosages between 0.03% and 0.06% also achieved 99% removal but required higher mass ratios (15.88 for Cd and 5.33 for Zn). Surface analysis using X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy with energydispersive X-ray spectroscopy (SEM-EDS) confirmed the formation of metal sulfides such as CdS and ZnS. The findings suggest that lower metal concentrations necessitate higher CPS-to-metal ratios for effective remediation, underscoring the importance of site-specific optimization of CPS injection for stabilizing heavy metals in groundwater.
Key words : Calcium polysulfide (CPS, CaSx), Complex heavy metals, Groundwater, Precipitation, Metal suilfides
