Original Article

Econ. Environ. Geol. 2019; 52(2): 141-158

Published online April 30, 2019

https://doi.org/10.9719/EEG.2019.52.2.141

© THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY

Investigation on Geochemical Characteristics of Heavy Metals in Soils in the Vicinity of Samcheonpo and Hadong Coal-Fired Power Plants in Korea

Chang-Woo Song, Hyeop-Jo Han and Jong-Un Lee*

Department of Energy and Resources Engineering, Chonnam National University, Gwangju, Korea

Correspondence to : *jongun@jnu.ac.kr

Received: March 27, 2019; Revised: April 24, 2019; Accepted: April 24, 2019

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided original work is properly cited.

Abstract

The quantity of heavy metals in agricultural surface and subsurface soils around coal-fired power plants located in Samcheonpo and Hadong, Gyeongnam Province, were determined. The analytical results for 48 and 61 soils in Samcheonpo and Hadong, respectively, showed that the concentrations of Cu, Hg, Ni, Pb, and Zn were below the warning criteria regulated by Korean Soil Conservation Act; however, Cd in 38 and 13 soils in Samcheonpo and Hadong, respectively, exceeded the criterion. As a result of calculation of the geoaccumulation index and the enrichment factor, the soils were extremely contaminated with Cd and such high loading of Cd to the soils was due to anthropogenic source(s). Sequential extraction of the soils, however, showed that heavy metals including Cd existed as hardly extractable phases, which represented a low bioavailability of the heavy metals. Our results indicated that Cd contamination around the coal-fired power plants was due to artificial source(s) and may unlikely deteriorate nearby ecosystems.

Keywords coal-fired power plant, heavy metals, soil, cadmium, sequential extraction

국내 삼천포와 하동 석탄 화력발전소 주변 토양 내 중금속의 지구화학적 특성 조사

송창우 · 한협조 · 이종운*

전남대학교 에너지자원공학과

요 약

경남에 소재하는 삼천포 및 하동 석탄 화력발전소 인근 농경지 토양을 대상으로 중금속 함량을 측정하였다. 삼천포 지역 48개, 하동 지역 61개의 표토 및 심토를 대상으로 분석한 결과, Cu, Hg, Ni, Pb, Zn는 모두 토양오염 우려기준 미만으로 나타났으나 Cd는 삼천포 38개, 하동 13개 시료에서 우려기준을 초과하였다. 지질부하지수와 농축계수를 구한 결과 Cd는 높은 오염도를 보였으며 Cd와 Pb는 인위적 오염원에 의한 토양 내 농축인 것으로 보인다. 그러나 연속추출을 통해 중금속의 존재형태를 규명한 결과 Cd를 포함한 토양 내 중금속들은 대부분 용출 가능성이 매우 적은 형태로 존재하여 생물이용도가 낮게 나타났다. 이러한 결과는 석탄 화력발전소 인근 토양이 인위적인 요인으로 인해 Cd로 오염되었으나 인근 생태계로 유입될 가능성은 낮음을 의미한다.

주요어 석탄 화력발전소, 중금속, 토양, 카드뮴, 연속추출

Article

Original Article

Econ. Environ. Geol. 2019; 52(2): 141-158

Published online April 30, 2019 https://doi.org/10.9719/EEG.2019.52.2.141

Copyright © THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY.

Investigation on Geochemical Characteristics of Heavy Metals in Soils in the Vicinity of Samcheonpo and Hadong Coal-Fired Power Plants in Korea

Chang-Woo Song, Hyeop-Jo Han and Jong-Un Lee*

Department of Energy and Resources Engineering, Chonnam National University, Gwangju, Korea

Correspondence to:*jongun@jnu.ac.kr

Received: March 27, 2019; Revised: April 24, 2019; Accepted: April 24, 2019

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided original work is properly cited.

Abstract

The quantity of heavy metals in agricultural surface and subsurface soils around coal-fired power plants located in Samcheonpo and Hadong, Gyeongnam Province, were determined. The analytical results for 48 and 61 soils in Samcheonpo and Hadong, respectively, showed that the concentrations of Cu, Hg, Ni, Pb, and Zn were below the warning criteria regulated by Korean Soil Conservation Act; however, Cd in 38 and 13 soils in Samcheonpo and Hadong, respectively, exceeded the criterion. As a result of calculation of the geoaccumulation index and the enrichment factor, the soils were extremely contaminated with Cd and such high loading of Cd to the soils was due to anthropogenic source(s). Sequential extraction of the soils, however, showed that heavy metals including Cd existed as hardly extractable phases, which represented a low bioavailability of the heavy metals. Our results indicated that Cd contamination around the coal-fired power plants was due to artificial source(s) and may unlikely deteriorate nearby ecosystems.

Keywords coal-fired power plant, heavy metals, soil, cadmium, sequential extraction

국내 삼천포와 하동 석탄 화력발전소 주변 토양 내 중금속의 지구화학적 특성 조사

송창우 · 한협조 · 이종운*

전남대학교 에너지자원공학과

Received: March 27, 2019; Revised: April 24, 2019; Accepted: April 24, 2019

요 약

경남에 소재하는 삼천포 및 하동 석탄 화력발전소 인근 농경지 토양을 대상으로 중금속 함량을 측정하였다. 삼천포 지역 48개, 하동 지역 61개의 표토 및 심토를 대상으로 분석한 결과, Cu, Hg, Ni, Pb, Zn는 모두 토양오염 우려기준 미만으로 나타났으나 Cd는 삼천포 38개, 하동 13개 시료에서 우려기준을 초과하였다. 지질부하지수와 농축계수를 구한 결과 Cd는 높은 오염도를 보였으며 Cd와 Pb는 인위적 오염원에 의한 토양 내 농축인 것으로 보인다. 그러나 연속추출을 통해 중금속의 존재형태를 규명한 결과 Cd를 포함한 토양 내 중금속들은 대부분 용출 가능성이 매우 적은 형태로 존재하여 생물이용도가 낮게 나타났다. 이러한 결과는 석탄 화력발전소 인근 토양이 인위적인 요인으로 인해 Cd로 오염되었으나 인근 생태계로 유입될 가능성은 낮음을 의미한다.

주요어 석탄 화력발전소, 중금속, 토양, 카드뮴, 연속추출

    KSEEG
    Jun 30, 2024 Vol.57 No.3, pp. 281~352

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