Pathogen removal efficacy of ceramic water filters (CWF) impregnated with silver nanoparticles (nAg) has been well studied, however scarce information is available about the impact of nAg surface functionalization and removal of inorganic and organic pollutants. In this study, we examined the effect of nAg functionalized with casein, maltose and phyto-extracts on the microbiological (Escherichia coli), organic (polycyclic aromatic hydrocarbon, PAH) and inorganic (heavy metals) simultaneous removal using disks manufactured in the laboratory. Results showed that the mass of nAg retained on each disk varied depending on the nanoparticles used (casein-nAg: 80%, maltose-nAg: 93%, and rosemary-nAg: 95%). Untreated CWF disks had a bacterial mass rejection (R_mass) of 95.97%, while nAg impregnated showed values above 99%. Bacteria log removal values (LRV) varied with the type of nanoparticle applied to the disks, rosemary-nAg impregnated disks attained the highest value among all the nAgs tested. In terms of lead removal, non-impregnated Red Art disks had a R_mass of 61%, while the nAg impregnated filters removed 74%, 72%, and 69%, for disks impregnated with casein-nAg, rosemary-nAg, and maltose-nAg, respectively. PAH removal was most effective in unmodified clay (72%), while modified disks had removal of 72% for casein-nAg, 67% for rosemary-nAg, and 69% for maltose-nAg. Mass removal rates of fluorene were determined at 73.38% for unmodified disks, while 74% for casein-nAg, 69% in rosemary-nAg, and 72% in maltose-nAg modified disks. nAg treated disks exhibited no statistical difference in PAH removal when compared to untreated. Application of nAg reduced the amount of culturable bacteria extracted from the surface an interior of the disks compared with unmodified disks. Results show that nAg impregnation increased the removal rates of E. coli and lead in the disks and that nAg average size and size distribution is an important factor in the removal rate of bacteria and lead in CWF.

中文翻译：

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了解掺有不同银纳米颗粒的陶瓷滤水器的微生物，有机和无机污染物去除能力†

浸有银纳米颗粒（nAg）的陶瓷滤水器（CWF）的病原去除效果已经得到了很好的研究，但是关于nAg表面功能化以及去除无机和有机污染物的影响的信息很少。在这项研究中，我们研究了使用酪蛋白，麦芽糖和植物提取物功能化的nAg对微生物（大肠杆菌），有机物（多环芳烃，PAH）和无机物（重金属）的去除效果，同时使用了实验室制造的磁盘。结果表明，保留在每个圆盘上的nAg的质量随所用纳米颗粒的不同而不同（酪蛋白-nAg：80％，麦芽糖-nAg：93％，迷迭香-nAg：95％）。未经处理的CWF圆盘具有细菌质量排斥（R_质量）为95.97％，而被nAg浸渍的值显示在99％以上。细菌对数去除值（LRV）随应用于圆盘的纳米颗粒的类型而变化，迷迭香-nAg浸渍的圆盘在所有测试的nAg中达到最高值。在除铅方面，未浸渍的Red Art光盘的_质量为R对于含酪蛋白-nAg，迷迭香-nAg和麦芽糖-nAg的圆盘，分别使用了61％和60％的nAg过滤器去除了74％，72％和69％。PAH去除在未改性粘土中最为有效（72％），而改性圆盘对酪蛋白-nAg的去除率为72％，对迷迭香-nAg的去除率为67％，对麦芽糖-nAg的去除率为69％。对于未改性的圆盘，芴的质量去除率确定为73.38％，而对酪蛋白-nAg的74％，在迷迭香-nAg中的69％和在麦芽糖-nAg改性的圆盘中确定为72％。与未经处理的相比，经nAg处理的磁盘在PAH去除方面无统计学差异。与未经修饰的磁盘相比，nAg的使用减少了从磁盘内部表面提取的可培养细菌的数量。结果表明，nAg浸渍提高了大肠杆菌的去除率 nAg的平均大小和大小分布是影响CWF中细菌和铅去除率的重要因素。