대한환경공학회지 (Journal of Korean Society of Environmental Engineers)

  • 제31권12호
  • /
  • Pages.1069-1074
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  • 2009
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  • 1225-5025(pISSN)
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  • 2383-7810(eISSN)
대한환경공학회 (Korean Society of Environmental Engineers)
권호 표지

산화 금속 입자 크기가 옥수수의 성장과 토양 미생물 군집에 미치는 독성

Size-dependent Toxicity of Metal Oxide Particles on the Soil Microbial Community and Growth of Zea Mays

  • 김성현 (이화여자대학교 에코과학부) ;
  • 정미애 (서강대학교 생명과학과) ;
  • 이인숙 (이화여자대학교 에코과학부)
  • 투고 : 2009.10.08
  • 심사 : 2009.11.12
  • 발행 : 2009.12.31
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초록

본 연구에서는 CuO와 ZnO의 입자 크기가 옥수수의 성장과 토양 미생물 군집에 미치는 독성을 microcosm 실험을 통하여 살펴보았다. 나노 입자는 micro 입자에 비해 옥수수의 biomass를 약 30% 감소시켜 나노 입자가 옥수수의 성장을 저해하는 것으로 나타났다. 토양 미생물 활성 지표인 Dehydrogenase activity는 CuO 나노 입자에서는 낮게 나타났으나 ZnO 나노 입자에서는 높게 나타났다. Biolog test 결과, CuO 나노 입자와 ZnO micro 입자에서 토양 미생물 다양성이 감소하는 것으로 나타났다. 그러므로, metal oxide의 나노 입자가 micro 입자보다 항상 토양 미생물의 활성 및 다양성에 더 유해한 영향을 나타내는 것은 아니라고 판단된다.

This study investigated soil microbial community and growth of Zea mays to compare the toxicity of nano and micro-sized Cu and Zn oxide particles in microcosm system. In the presence of nanoparticles, biomass of Zea mays reduced by 30% compared with micro-sized particles and inhibited growth. Dehydrogenase activity was inhibited by CuO nano although it was increased by ZnO nano particles. According to the Biolog test, the microbial diversity was decreased after exposed to CuO nanoparticles and ZnO microparticles. Therefore, though it is widely recognized that nanoparticles are more harmful than microparticles, we can conclude that the diversity of microbial community does not always influenced by the size of particles of nano and micro.

키워드

참고문헌

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