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g-C3N4/TiO2 NPs Impregnated Polyethylene Composite Media for Hydroponics
2018년 8월 30일 17시 47분 49초
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10월 18일 (목요일) 11:00~12:30
, Hyun Kim
, Bee Lyong Yang
Kumoh National Institute of Technology, Korea
School of Materials Science and Engineering, Kumoh National Institute of Technology, Korea
Department of Advanced Materials Engineering, Kumoh National Institute of Technology, Korea
Hydroponics is a method to grow plants without soil. This method has been attention to produce foods for future against a gradually increasing serious contamination of soil, a drought, damages from insects and a climate changing. In addition to it has several controllable properties such as a growing period, composition of nutrients, high additive plants production, CO2 reduction and saving water. In order to cultivate plants using hydroponic method, media as standing seeds and absorbing nutrient solution, green, red, blue and white LED for photosynthesis, temperature and humidity control system, circulating nutrient and recycling system and suitable CO2 atmosphere for photosynthesis are required. Among these requirements, media materials dominantly determine successful growing plants because it acts nutrient and water container to supply with balance. Rock wool as popular medium is a molten mineral came from volcano over 1600℃. However it causes environmental contamination because it is hardly degradable and high temperature melting process is required. Recently alternative media has been studied such as rice husk, coconut based media and fishbone. But theses eco-friendly media have low nutrient and water contents as well as biological contamination that decrease media performance. Therefore now new media materials involving similar properties of rock wool but easier degradation without contamination are needed. In this work, bio-degradable microporous polyethylene with g-C3N4/TiO2 NPs composite are suggested as an alternative of rock wool. Microporous polyethylene was prepared phase inversion method. g-C3N4 and TiO2 nanoparticles were prepared by sol-gel and hydrothermal method. Hydroponic test equipment was consisted of transparent plastic, LED, air supply, CO2 gas control system, PVC media bed circulation system of nutrient solution with pump and temperature/humidity controller. Properties of media were compared with present rock wool and coconut based media by growing plants. Organic-inorganic composite media show better growing control than present media such as growth of root, shape of leaf and length.
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