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2025 Vol.58, Issue 11S-2 Preview Page

Research Article

Evaluation of metal release and changes in environmental factors induced by sediment disturbance

퇴적물 교란에 따른 금속 용출 및 환경인자 변화 특성 평가

Jaehui Leea
,
Hyuna Sob
,
Sang-Gyu Yoonc
,
Seung Ho Hongd
,
Jinsung Ane*
이 재희a
,
소 현아b
,
윤 상규c
,
홍 승호d
,
안 진성e*
aM.S. Candidate, Department of Civil and Environmental Systems Engineering, Hanyang University ERICA, Ansan, Korea
bB.S. Candidate, Department of Civil and Environmental Engineering, Hanyang University ERICA, Ansan, Korea
cPh.D. Candidate, Department of Smart City Engineering, Hanyang University ERICA, Ansan, Korea
dProfessor, Department of Civil and Environmental Engineering, Hanyang University ERICA, Ansan, Korea
eAssociate Professor, Department of Civil and Environmental Engineering, Hanyang University ERICA, Ansan, Korea
a한양대학교 ERICA 건설환경시스템공학과 석사과정
b한양대학교 ERICA 건설환경공학과 학사과정
c한양대학교 ERICA 스마트시티공학과 박사과정
d한양대학교 ERICA 건설환경공학과 교수
e한양대학교 ERICA 건설환경공학과 부교수
*Corresponding Author
30 November 2025. pp. 1239-1247
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Abstract

This study investigated the release characteristics of metals and the variation of environmental parameters in sediments under physical disturbance. Artificially contaminated sediments with two different textures (Loamy sand and Sand) were subjected to mechanical mixing experiments to evaluate the effects of sediment disturbance. The concentrations of eight metals (As, Cd, Cr, Cu, Hg, Ni, Pb, Zn) and environmental factors (pH, dissolved oxygen (DO), dissolved organic carbon (DOC), sulfate, total Fe, Fe2+, Fe3+, suspended solids, electrical conductivity, and oxidation–reduction potential (ORP)) were analyzed in the overlying water and porewater before and after disturbance. Metal concentrations increased in both sediment types with applying a disturbance condition, with a greater rise observed in Sand-type sediment due to its lower contents of organic matter and oxides. The decrease in sulfate and Fe2+, accompanied by an increase in DO and ORP, clearly indicated a transition toward oxidizing conditions after disturbance. Pearson correlation analysis revealed that DO, DOC, Fe, and sulfate were the dominant factors influencing metal mobility. These findings suggest that redox-sensitive environmental parameters among the physicochemical properties of sediments play a crucial role in determining the remobilization of metals during sediment disturbance events.

Keywords
Sediment disturbance
Metals
Overlying and pore water
Correlation analysis
Redox conditions

이 연구에서는 물리적 교란 하에서 퇴적물에서의 금속 용출 특성과 환경매개변수의 변화를 조사했다. 두 가지 다른 질감(양토와 모래)을 가진 퇴적물에 8종의 금속(As, Cd, Cr, Cu, Hg, Ni, Pb, Zn)을 인공오염시키고 기계식 교반기를 활용한 교란 실험을 실시했다. 교란 전후의 상층수와 공극수에서 금속의 농도와 환경적 요인(pH, 용존산소, 용존유기탄소, 황산염, 총 Fe, Fe2+, Fe3+, 부유 고형물, 전기 전도도, 산화환원전위)을 분석했다. 교란에 따라 두 퇴적물 유형 모두에서 금속 용출 농도가 증가했으며, 유기물과 산화물 함량이 낮은 모래질 퇴적물에서 더 큰 증가폭이 관찰되었다. 황산염과 Fe2+의 감소, 용존산소와 산화환원전위의 증가는 교란에 따른 산화 조건으로의 전환을 뚜렷이 보여준다. 피어슨 상관분석 결과, 용존산소, 용존유기탄소, 철, 그리고 황산염이 금속 이동성에 영향을 미치는 주요 요인으로 확인되었다. 이러한 결과는 퇴적물 교란 시 금속의 재용출을 결정하는 데 퇴적물의 물리화학적 특성 중 산화환원반응에 민감한 환경매개변수가 중요함을 시사한다.

키워드
퇴적물 교란
금속
상층수 및 공극수
상관관계분석
산화환원 조건
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Information
  • Publisher :KOREA WATER RESOURECES ASSOCIATION
  • Publisher(Ko) :한국수자원학회
  • Journal Title :Journal of Korea Water Resources Association
  • Journal Title(Ko) :한국수자원학회 논문집
  • Volume : 58
  • No :11
  • Pages :1239-1247
  • Received Date : 2025-10-20
  • Revised Date : 2025-10-25
  • Accepted Date : 2025-10-27
  • DOI :https://doi.org/10.3741/JKWRA.2025.58.S-2.1239
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