유기물자원화 (Journal of the Korea Organic Resources Recycling Association)

  • 제20권3호
  • /
  • Pages.60-70
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  • 2012
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  • 1225-6498(pISSN)
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  • 2508-3015(eISSN)
유기성자원학회 (Korea Organic Resources Recycling Association)
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슬러지 급이에 따른 Zn, Cu, Fe, Al의 줄지렁이 체내 생물축적

Bioaccumulation of Zn, Cu, Fe and Al in the Earthworm Eisenia Fetida (Ennelida; Oligochaeta) in Relation to the Supply of Sludges

  • 박광일 (대진대학교 생명과학과) ;
  • 배윤환 (대진대학교 생명과학과)
  • 발행 : 2012.09.30
⟨ 이전 논문 다음 논문 ⟩

초록

경기도 포천시에 소재하는 몇 군데의 하수처리장에서 채취된 슬러지내의 Zn, Cu, Fe, Al 함량을 측정하고 슬러지를 줄지렁이에게 장기간 급이하면서 이들 금속류의 지렁이 체내 축적량을 조사하였다. 슬러지내 Zn 함량은 75.1~196.1 mg/kg, Cu 함량은 3.74~76.1 mg/kg, Fe 함량은 219.9~857.8mg/kg, Al 함량 198.4~991.7 mg/kg로 나타났다. 이들 금속류의 슬러지내 함량은 줄지렁이에 대하여 단기적으로 직접 치사 독성을 유발할 정도는 아니었으나, 장기적으로는 아독성을 유발할 가능성이 있고 이들 금속류에 의한 산란 및 부화율 억제에 의한 차세대 개체군의 감소 현상을 유발할 것으로 판단된다. 그러나 60g(dw)의 슬러지 급이후 이들 금속류의 지렁이 생체내 축적률(BAF)은 0.0-0.43으로 낮은 경향을 나타내었으며 슬러지를 장기간 급이하여도 슬러지내 Zn, Cu, Fe, Al가 줄지렁이 생체내에 누적적으로 축적되지는 않는 것으로 나타났다.

Zn, Cu, Fe, Al contents of sludges produced from sewage treatment plants and night soil treatment plant in Pocheon City, Gyeong-gi Province were investigated. And the accumulated contents of those metals in the earthworm Eisenia fetida were also investigated while 15, 30, 45, 60, 75, 90, 105 grams(dw) of sludges were cumulatively supplied to the earthworms. Zn contents of sludges were 75.1~196.1 mg/kg, Cu contents 3.74~76.1 mg/kg, Fe contents 219.9~857.8 mg/kg, Al contents 198.4~991.7 mg/kg, all of which would not cause acute toxicity to the earthworm, but could cause sublethal effects on earthworm and reduce the density of next generation's population. However, cumulative supplies of sludges didn't increase the bioaccumulation rates of metals in the earthworm body, and BAFs of those metals after 60g of sludge supply were 0.0~0.43, which meant that the accumulated Zn, Cu, Fe, Al contents in the earthworm were lower than those of sludges.

키워드

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