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2024 Vol.25, Issue 5
Applications of Acid/Base Modified Activated Carbon for Stabilization of Sediment Contaminated with Organic Compounds

산/염기 개질활성탄을 이용한 유기오염물질 오염 퇴적토 안정화를 위한 적용성 연구

Seunghyun Kang1
,
Jaewoo Park2*
강 승현1
,
박 재우2*
1Master Student, Department of Civil and Environmental Engineering, Hanyang University
2Professor, Department of Civil and Environmental Engineering, Hanyang University
*Corresponding Author
1 May 2024. pp. 5-13
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Abstract

This paper investigates the stabilization feasibility of contaminated sediment contaminated with benzyl butyl phthalate (BBP) using acid/base-modified activated carbon. The efficiency of stabilizers was evaluated by analyzing the impact of the activated carbon on the decomposition and adsorption of the contaminant, along with the biological effects on earthworms. Additionally, the contaminant migration was monitored with the BBP concentration in pore water using low-density polyethylene. The research results indicated that the accumulated concentration of BBP was approximately 2% lower in the experimental group applying a 5% mixture ratio of modified activated carbon compared to the group applying a 10% mixture ratio. The leaching into water was reduced by over 18% in all experimental conditions after 7-day exposure period. Over 25% reduction was observed after 28-day exposure. The pore water concentrations were measured. After 7 days of exposure, the mechanically mixed experimental group exhibited a higher pore water stabilization rate compared to the biologically mixed group. Within the mechanically mixed group, the experimental group with 10% mixture of modified activated carbon showed a 1% higher stabilization rate than the group with 5% mixture. After 28 days of exposure, the biologically mixed experimental group demonstrated a higher pore water stabilization rate compared to the mechanically mixed group. Moreover, within the biologically mixed group, the experimental group with 10% mixture of modified activated carbon showed approximately 0.1% higher stabilization rate than the group with 5% mixture.

Keywords
Activated carbon
Sediment
Stabilization
Adsorption
Phthalate

본 논문에서는 유기오염물질인 benzyl butyl phthalate(BBP)에 오염된 퇴적토를 산/염기 개질활성탄을 이용한 퇴적토의 안정화 과정과 그 영향을 연구하였다. 실험을 통해 안정화제의 효율성을 평가하고, Lumbriculus variegatus를 이용한 생물학적 영향과 함께 개질활성탄의 혼합량 증가가 오염물질의 흡착에 미치는 영향을 분석하였다. 또한, low-density polyethylene를 사용한 공극수 내 유기오염물질 농도 측정을 통해 안정화제가 환경 내 오염물질의 이동을 어떻게 제한하는지에 대해 조사하였다. 연구 결과 Lumbriculus variegatus의 생존률이 90% 이상을 나타내었으며, 체내 BBP 축적 농도는 개질활성탄을 10% 혼합한 두 실험군보다 개질활성탄을 5% 혼합한 두 실험군이 약 2% 낮은 농도를 나타내었다. 수중으로의 용출량은 노출기간 7일 경과 후 모든 실험조건에서 대조군 대비 18% 이상 저감 되었으며, 노출기간 28일 후 모든 실험조건에서 25% 이상 저감된 효율을 확인하였다. 공극수의 농도를 측정하였다. 7일 노출 후의 결과는 기계혼합 실험군이 생물혼합 실험군 보다 높은 안정화율을 보였으며, 기계혼합 실험군에서, 개질활성탄을 10% 혼합한 실험군이 개질활성탄을 5% 혼합한 실험군 보다 1% 높은 안정화율을 보였다. 28일간 노출 후의 결과는 생물혼합 실험군이 기계혼합 실험군보다 높은 안정화율을 보였으며, 개질활성탄을 10% 혼합한 생물혼합 실험군이 개질활성탄을 5% 혼합한 실험군보다 약 0.1% 높은 안정화율을 보였다.

키워드
활성탄
퇴적토
안정화
흡착
프탈레이트
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Information
  • Publisher :Korean Geo-Environmental Society
  • Publisher(Ko) :한국지반환경공학회
  • Journal Title :Journal of the Korean Geo-Environmental Society
  • Journal Title(Ko) :한국지반환경공학회 논문집
  • Volume : 25
  • No :5
  • Pages :5-13
  • Received Date : 2024-02-29
  • Revised Date : 2024-03-12
  • Accepted Date : 2024-04-16
  • DOI :https://doi.org/10.14481/jkges.2024.25.5.5
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