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

Kim, Sung-Hyun (Division of EcoScience, Ewha Womans University)
Jung, Mi-Ae (Department of LifeScience, Sogang University)
Lee, In-Sook (Division of EcoScience, Ewha Womans University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.31, no.12, 2009 , pp. 1069-1074 More about this Journal
Abstract
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.
Keywords
Nanoparticle toxicity; Metal oxide particles; Growth of Zea mays; Soil microbial community;
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