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2022 Vol.59, Issue 6

Research Paper

Status and Evaluation of Characteristics of Deposited Tailings in the Upstream of Andong Dam

안동댐 상류 퇴적 광물찌꺼기 현황 및 특성 평가

Jeong Wook Kim1
,
Myung Chae Jung1*
,
Hyowon Lee1
,
Hyeonjoong Kim2
,
Haejun Heo3
김 정욱1
,
정 명채1*
,
이 효원1
,
김 현중2
,
허 해준3
1Department of Energy Resources and Geosystem Engineering, Sejong University, Seoul, Korea
2Department of Environment Engineering, Kunsan National University, Gunsan, Korea
3Department of Urban Engineering, Yeungnam University, Gyeongsan, Korea
1세종대학교 지구자원시스템공학과
2군산대학교 환경공학과
3영남대학교 도시공학과
*Corresponding Author
31 December 2022. pp. 607-618
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Abstract

This study evaluated the current status and leaching properties of deposited tailings from both banks in the upper region of the Nakdong river. The deposited tailings samples were collected at 80 points over 55 km from Gumunso, Taebaek-si. The estimated volume of deposited tailings was 3,668 m3, with an exposed tailings area of 1,468 m2. The chemical results showed that the average concentrations of As, Cd, Pb, and Zn in the tailings were 3,518, 15.39, 2,616, and 2,307 mg/kg, respectively. Results of the KSLP showed that the Cd and Pb in the tailings exceeded environmental standards, and Zn was relatively high. According to sequential extraction of the tailings, As dominated Fraction 3, whereas relatively high proportions of Cd existed in Fractions 1 and 2. In addition, the deposited tailings were re-lost in the form of particles via physical separation and crushing due to natural weathering.

Keywords
Deposited tailings
Upstream of Andong Dam
Nakdong river
As
Heavy metals

이 연구에서는 안동댐 상류 낙동강 양안에 퇴적되어 있는 광물찌꺼기의 현황 및 용출특성을 평가하고자 하였다. 태백시 구문소를 기점으로 약 55 km에 걸쳐 80지점에서 퇴적 광물찌꺼기를 확인하였으며, 퇴적된 광물찌꺼기의 부피는 약 3,668 m3로 추정되며, 노출 면적은 1,429 m2으로 조사되었다. 퇴적된 광물찌꺼기에 대한 전함량 분석 결과, As, Cd, Pb, Zn의 평균 햠량은 각각 3,518, 15.39, 2,616, 2,307 mg/kg 이었다. 폐기물용출시험 결과에서는 Cd과 Pb이 환경기준을 초과하는 것으로 조사되었고, Zn이 상대적으로 높게 용출되었다. 연속추출 결과, As는 주로 비결정질 Fe-Al 산화물 결합 형태의 비율이 가장 높게 나타났고, Cd과 Zn은 외부 환경변화에 따라 쉽게 용출될 수 있는 비율이 다른 원소에 비해 높게 평가되었다. 특히, 퇴적 광물찌꺼기는 자연적 풍화작용으로 인하여 물리적 분리 및 파쇄에 의한 입자상 형태로 재유실이 진행되고 있다.

키워드
퇴적 광물찌꺼기
안동댐 상류
낙동강
비소
중금속
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Information
  • Publisher :The Korean Society of Mineral and Energy Resources Engineers
  • Publisher(Ko) :한국자원공학회
  • Journal Title :Journal of the Korean Society of Mineral and Energy Resources Engineers
  • Journal Title(Ko) :한국자원공학회지
  • Volume : 59
  • No :6
  • Pages :607-618
  • Received Date : 2022-10-13
  • Revised Date : 2022-11-07
  • Accepted Date : 2022-12-27
  • DOI :https://doi.org/10.32390/ksmer.2022.59.6.607
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