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2021 Vol.26, Issue 5 Preview Page
Remediation of Heavy Metal-Contaminated Soil Within a Military Shooting Range through Physicochemical Treatment

물리화학적 처리를 이용한 군부대 사격장 내 중금속 오염 토양의 정화

Sang-Woo Lee1
,
Woo-Chun Lee1
,
Sang-Hwan Lee2
,
Soon-Oh Kim1*
이상우 1
,
이우춘 1
,
이상환 2
,
김순오 1*
1Department of Geology and Research Institute of Natural Science (RINS), Gyeongsang National University, Jinju 52828, Korea
2Gyeongin Branch, Mine Reclamation Corporation, Seoul 03151, Korea
1경상대학교 지질과학과 및 기초과학연구소(RINS)
2한국광해관리공단 경인지사
*Corresponding Author
31 October 2021. pp. 9-19
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Abstract

This study evaluated the feasibility of combined use of physical separation and soil washing to remediate heavy metals (Pb and Cu) contaminated soil in a military shooting range. The soils were classified into two types based on the level of heavy metal concentrations: a higher contaminated soil (HCS) with Pb and Cu concentrations of 6,243 mg/kg and 407 mg/kg, respectively, and a lower contaminated soil (LCS) with their concentrations of 1,658 mg/kg and 232 mg/kg. Pb level in both soils exceeded the regulatory limit (700 mg/kg), and its concentration generally increased with decreasing soil particle size. However, in some cases, Pb concentrations increased with increasing soil particle size, presumably due to the presence of residues of bullets in the soil matrix. As a pretreatment step, a shaking table was used for physical separation of soil to remove bullet residues while fractionating the contaminated soils into different sizes. The most effective separation and fractionation were achieved at vibration velocity of 296 rpm/min, the table slope of 7.0°, and the separating water flow rate of 23 L/min. The efficiency of ensuing soil washing process for LCS was maximized by using 0.5% HCl with the soil:washing solution mixing ratio of 1:3 for 1 hr treatment. On the contrary, HCS was most effectively remediated by using 1.0% HCl with the same soil:solution mixing ratio for 3 hr. This work demonstrated that the combined use of physical separation and soil washing could be a viable option to remediate soils highly contaminated with heavy metals.

Keywords
Heavy metal contaminated soil
Military shooting range
Physical separation
Soil washing
References

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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 : 26
  • No :5
  • Pages :9-19
  • Received Date : 2021-09-06
  • Revised Date : 2021-09-09
  • Accepted Date : 2021-09-24
  • DOI :https://doi.org/10.7857/JSGE.2021.26.5.009
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