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首页> 外文会议>2010 water quality technology conference amp; exposition: A river of innovation for the future >Effects of water quality parameters on the release of silver nanoparticles from a ceramic surface using a quartz crystal microbalance
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Effects of water quality parameters on the release of silver nanoparticles from a ceramic surface using a quartz crystal microbalance

机译：水质参数对使用石英晶体微量天平从陶瓷表面释放银纳米颗粒的影响

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Ceramic water filters are used in many developing countries as a household water treatment technology,rnoften produced locally by use of regionally available materials and constructed in various forms (i.e., asrndiscs, candles, or pots) that all rely on similar mechanisms of filtration and disinfection. A commonrnproduction technique involves the application of an antimicrobial, colloidal silver coating to the porousrnceramic filter. The silver coating has shown improvements in microbial log reduction values overrnuncoated ceramic filters both in the laboratory and in the field. However, as water passes through thernceramic filter, the silver coating will release from the ceramic surface, decreasing the disinfectionrneffectiveness of the filter by reducing the amount of silver.rnIn this investigation, a colloidal silver solution was prepared according to procedures recommended forrnproduction of ceramic pot filters. Silver nanoparticles were adsorbed onto representative ceramic surfacesrnand assessed with a quartz crystal microbalance, which monitored silver release from the surface.rnExperiments were conducted to determine the effects of several water quality parameters, including pH,rnturbidity, ionic strength, and natural organic matter, on the release of silver nanoparticles fromrnrepresentative ceramic surfaces. The most significant release was caused by waters containing sodiumrnhypochlorite, the main component of household bleach, suggesting that cleaning of silver-containingrnceramic filters should be performed with caution.
机译：陶瓷滤水器在许多发展中国家被用作家庭水处理技术，通过使用区域可得的材料在本地生产，并且以各种形式（例如，碟，蜡烛或盆）构造，它们都依赖于相似的过滤和消毒机制。一种常见的生产技术涉及将抗微生物的胶体银涂层施加到多孔陶瓷过滤器上。银涂层在实验室和现场均显示出与未涂覆陶瓷过滤器相比微生物对数减少值的改善。但是，当水通过陶瓷过滤器时，银涂层会从陶瓷表面释放出来，通过减少银的含量降低了过滤器的消毒效果。在这项研究中，根据建议用于制造陶瓷锅的程序制备了胶体银溶液过滤器。将银纳米颗粒吸附到代表性的陶瓷表面上-并用石英晶体微量天平进行评估，以监测表面银的释放。-进行了试验以确定pH，浊度，离子强度和天然有机物等几种水质参数对水的影响。银纳米颗粒从代表性陶瓷表面的释放。最显着的释放是由含有次氯酸钠的水引起的，次氯酸钠是家用漂白剂的主要成分，这表明清洁含银陶瓷滤池时应格外小心。

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