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2025 Vol.30, Issue 2 Preview Page
Reduction of Cd, Pb, and Zn Bioaccumulation in Lumbriculus variegatus Using Nitric Acid-Sodium Hydroxide Modified Activated Carbon

질산-수산화나트륨 개질 활성탄을 이용한 Lumbriculus variegatus 의 Cd, Pb, Zn 생물축적량 저감 실험연구

Hwanjong Seo1
,
Jae-Woo Park1*
서환종 1
,
박재우 1*
1Department of Civil and Environmental Engineering, HanyangUniversity, Seongdong-gu, Seoul 04763, South Korea
1한양대학교 건설환경공학과
*Corresponding Author
30 April 2025. pp. 13-24
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Abstract

This study investigated the effectiveness of acid-base modified activated carbon in reducing the mobility and bioavailability of heavy metals (Cd, Pb, Zn) in contaminated sediments using Diffusive Gradient in Thin films (DGT) analysis and bioaccumulation assessment with Lumbriculus variegatus. Microcosm experiments were conducted for 7, 14, 21, and 28 days using stabilizer application rates of 5% and 10%, with mechanical mixing and bioturbation methods. DGT analysis showed that the modified activated carbon achieved maximum stabilization efficiencies of 91.67% for Cd, 83% for Pb, and 98.25% for Zn, effectively decreasing the concentrations of bioavailable heavy metals over time. In the bioaccumulation assessment, the accumulation of heavy metals in L. variegatus decreased by up to 9.4 times at the 10% application rate compared to the 5% rate, confirming the dose-dependent effect of the stabilizer. Initially, the population decreased temporarily due to the intake of stabilizers in benthic organisms, but the survival population recovered over time, indicating that the long-term negative impact was not significant. These results indicate that the acid-base modified activated carbon is an effective stabilizing agent for heavy metal-contaminated sediments and highlight the importance of determining optimal application rates by balancing stabilization efficiency and ecological stability.

Keywords
Acid-base modified activated carbon (HNO3–NaOH modified activated carbon)
Heavy metals
Adsorption
Diffusive Gradient in Thin films (DGT)
Bioaccumulation
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Information
  • Publisher :The Korean Society of Soil and Groundwater Environment
  • Publisher(Ko) :한국지하수토양환경학회
  • Journal Title :Journal of Soil and Groundwater Environment
  • Journal Title(Ko) :지하수토양환경
  • Volume : 30
  • No :2
  • Pages :13-24
  • Received Date : 2025-03-17
  • Revised Date : 2025-03-22
  • Accepted Date : 2025-04-15
  • DOI :https://doi.org/10.7857/JSGE.2025.30.2.013
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