Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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Phytoremediation of Soils Contaminated with Heavy Metal by Long-Term Cultivation

장기재배 시험에 의한 중금속 오염토양의 식물정화

  • Jung, Goo-Bok (National Institute of Agricultural Science and Technology, RDA) ;
  • Kim, Won-Il (National Institute of Agricultural Science and Technology, RDA) ;
  • Lee, Jong-Sik (National Institute of Agricultural Science and Technology, RDA) ;
  • Kim, Kyung-Min (Dept. of Environmental Engineering, Yonsei University)
  • 정구복 (농업과학기술원 환경생태과) ;
  • 김원일 (농업과학기술원 환경생태과) ;
  • 이종식 (농업과학기술원 환경생태과) ;
  • 김경민 (연세대학교 환경공학과)
  • Published : 2002.03.31
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Abstract

In order to select proper plants for phytoremediation at heavy metal contaminated areas, eight species of non-edible plants were cultivated at the heavy metal contaminated soils near a metal smelter. The content of the absorbed heavy metals (Cd, Cu, Pb and As) at different part of the plants were analyzed. Plants included five tree species (Populus nigra x P. maximowiczii, Euonymus japonica, Acer palmantum, Celtis sinensis, Buxus microphylla), two flower species (Rhododendron lateritium, Calendula officinalis), and lawn (Zoysia japonica). Biomass yield of tree species was higher than those of flower or lawn species. Heavy metals were highly accumulated in roots compared to those In leaves and stems. The concentrations of Cd, Cu, Pb, and As in Buxus microphylla were greater than those in other plant species. Total absorbed Cd and Pb contents, from high to low by each plant in experimental plots were in the order of Populus nigra x P. maximowiczii, Celtis sinensis and Acer palmantum. They were Celtis sinensis, Populus nigra x P. maximowiczii and Buxus microphylla for Cu, and Buxus microphylla, Acer palmantum and Populus nigra x P. maimowiczii for As. It was estimated that among eight plant species used in the experiment Populus nigra x P. maximowiczii, Buxus microphylla, Acer palmantum, and Celtis sinensis were the most effective species for phytoremediation in the heavy metals polluted areas considering biomass yield and heavy metal uptake.

중금속 오염토양에 대한 식물학적 복원에 적합한 식물종 탐색을 위하여 수목류 5종, 화훼류 2종 및 잔디를 대상으로 제련소 인근 중금속 오염지 포장에서 3년간 재배하여 연차별로 식물중에 흡수된 중금속 함량을 조사하였다. 식물의 건물중은 양황철, 팽나무, 적단풍, 사철나무, 회양목 순이었고, 연차별 건물중의 증가도 팽나무, 양황철, 적단풍이 높게 나타났다. 식물의 중금속은 지하부가 지상부보다 높은 함량을 보였으며, 식물중 회양목은 뿌리에서 매우 높게 나타났다. 공시식물의 3년차 총 흡수량은 카드뮴이 양황철, 팽나무, 단풍나무, 구리가 팽나무, 양황철, 회양목, 납이 양황철, 팽나무, 단풍나무, 비소가 회양목, 단풍나무, 양황철 순으로 높게 나타났다. 이상의 결과에서 식물의 건물중과 중금속 흡수량을 볼 때 양황철, 회양목, 단풍나무 및 팽나무 등이 중금속으로 오염된 토양에 대한 정화 식물로 이용할 수 있을 것으로 생각되었다.

Keywords

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