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http://dx.doi.org/10.4491/KSEE.2017.39.7.418

Environmental Fate and Effect of ZnO Nanoparticles  

Ha, Ji Yeon (Department of Human and Environmental Toxicology, University of Science and Technology)
Jang, Min Hee (Future Environmental Research Center, Korea Institute of Toxicology)
Hwang, Yu Sik (Department of Human and Environmental Toxicology, University of Science and Technology)
Publication Information
Journal of Korean Society of Environmental Engineers / v.39, no.7, 2017 , pp. 418-425 More about this Journal
Abstract
ZnO nanoparticles (ZnO NPs) are mainly used in semiconductors, solar cells, biosensors, and cosmetics (sunscreen). In this study, we investigated the behavior of ZnO NPs in aquatic and soil environments and their effects on plants (Artemisia annua L.) in hydroponic cultivation. It was confirmed that the ZnO NPs size increased and their dissolution decreased with increasing in pH. Leaching distance of ZnO NPs was less than 2.5 cm, indicating that ZnO NPs had a little potential to leach into deeper soil layers. When ZnO NPs were exposed to plant, the total weights of plants decreased. The effects on the length of root and shoot were not observed. In addition large amount of ZnO NPs were adsorbed on the surface of plant root and didn't translocate into shoot. These results suggest that ZnO NPs block the pores of the root cell wall and decrease the bioavailability of plant nutrients. Therefore it can be speculated that the particles increase in size and settle down in the water environment and may adversely affect the plant growth by firmly adhering to the root surface when the ZnO NPs are exposed to the environment.
Keywords
ZnO Nanoparticles; Aggregation; Dissolution; Plant;
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Times Cited By KSCI : 1  (Citation Analysis)
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