• Spatial Distributions of Chromium, Copper, and Arsenic Concentrations in Soils Near Three Log Structures and a Sound Barrier, All Constructed with CCA-treated Wood
  • Kim, He-Kap;Song, Byeong-Yeol;Koo, Jin-Hoi;
  • Department of Environmental Science, Kangwon National University;Department of Environmental Science, Kangwon National University;Department of Environmental Science, Kangwon National University;
  • CCA 처리 목재로 지은 세 개의 통나무 구조물과 방음벽 주변 토양에서 크롬, 구리 및 비소의 공간적 분포
  • 김희갑;송병열;구진회;
  • 강원대학교 환경과학과;강원대학교 환경과학과;강원대학교 환경과학과;
Abstract
This study was conducted to investigate the spatial distributions of chromated copper arsenate (CCA) metals in soils around three log structures and a sound barrier, all built with CCA-treated wood. Sixty-six surface and 35 profile soil samples were collected around the wood structures in addition to 13 background soil samples. The concentrations of chromium, copper, and arsenic in the soil samples collected in the vicinity of the structures were higher than those in the background samples, except in the case of one structure. The concentrations in the surface soils adjacent to the 3-year-old structures seemed to be higher than those in the soils adjacent to the 8-year-old ones. Although the lateral distributions of the metals varied with the structures, chromium and arsenic appeared to show concentration gradients within 20-60 cm and 40-100 cm, respectively. Copper seemed to be the least mobile, displaying concentration gradients only within 20 cm. Even though there were no explicit vertical concentration gradients for any of the metals according to the profile soil sample analysis, chromium and copper seemed to show concentration gradients only up to 5 and 10 cm, respectively, whereas arsenic showed gradients up to 35 cm. At study sites, it was evident that heavy metals leached into soil from CCA-treated wood were confined to neighboring areas both laterally and vertically, and that any plausible ecological impact may occur only within a small range.

본 연구는 chromated copper arsenate(CCA)로 처리된 목재로 지은 세 개의 통나무 구조물과 하나의 방음벽 주변 토양에서 CCA 금속들의 공간적인 분포를 조사하기 위해 수행되었다. 13개의 배경 토양 시료뿐만 아니라 목재 구조물 주변에서 66개의 지표 및 35개의 종단면 토양 시료를 채취하였다. 구조물에 인접한 곳에서 채취한 토양 시료에서 크롬, 구리 및 비소의 농도는 하나의 구조물을 제외하고는 모두 배경 토양에서의 농도보다 높았으며, 3년 된 구조물에 인접한 표토에서의 농도는 8년 된 구조물에서의 농도보다 높게 나타났다. 비록 금속들의 수평 분포는 구조물에 따라 다르긴 하였지만, 크롬과 비소는 각각 20-60 cm 및 40-100 cm 내에서 농도 구배를 보이는 것 같았다. 구리는 가장 이동성이 작아서, 단지 20 cm 이내에서만 농도 구배를 나타냈다. 종단면 토양 시료 분석에 따르면 어떤 금속도 명확한 수직 분포를 보이지는 않았지만, 크롬과 구리는 각각 5 및 10 cm까지, 그리고 비소는 35 cm까지 구배를 보였다. 이 연구의 대상지역에서 CCA로 처리된 목재로부터 토양으로 용탈된 금속들은 수평 및 수직으로 인근 지역에 한정적으로 이동하여 분포하고, 가능한 생태적인 영향은 작은 범위 내에서만 일어날 것임을 보여주었다.

Keywords: CCA;Log structure;Metals;Sound barrier;Spatial distribution;

Keywords: 통나무 구조물;금속;방음벽;공간적 분포;

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This Article

  • 2008; 13(2): 12-20

    Published on Apr 30, 2008