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Gamma Irradiation Route to Large-Scale Production of Ag Nanoparticles and Fixing in Porous Ceramic Candle for Point-Of-Use Water Treatment
並列摘要
The Ag nanoparticles/PVP solution (AgNPs) with concentration of 500 mg/L and AgNPs diameter of 10-15 nm was synthesized on a large scale up to 100 L/batch by gamma irradiation route. Porous ceramic candle (PC) samples were functionalized by treatment with a 3-aminopropyltriethoxysilane (AS) coupling agent and then impregnated in AgNPs solution for fixing AgNPs. The AgNPs content attached in PC (PC/AgNPs) determined by ICP-AES was of about 200-250 mg/kg. The average pore size of PC/AgNPs was about 48.2 Å analyzed by BET method. Owing to strong bonding of silver atoms to the wall of PC treated with AS, the contents of silver released from PC/AgNPs into filtrated water by flow test at a flow rate of about 5 L/h were less than 10μg/L, it is satisfactory to the WHO guideline (＜ 100μg/L) for drinking water. Thus, PC/AgNPs candles can be potentially applied for point-of-use drinking water treatment.
延伸閱讀
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