Department of Civil and Environmental Engineering, University of Rhode Island, Kingston, RI 02881, United States.
J Hazard Mater. 2013 Sep 15;260:272-7. doi: 10.1016/j.jhazmat.2013.05.025. Epub 2013 May 20.
This study compares the disinfection performance of ceramic water filters impregnated with two antibacterial compounds: silver nanoparticles and a polymer based quaternary amine functiaonalized silsesquioxane (poly(trihydroxysilyl) propyldimethyloctadecyl ammonium chloride (TPA)). This study evaluated these compounds using ceramic disks manufactures with clay obtained from a ceramic filter factory located in San Mateo Ixtatan, Guatemala. Instead of using full size ceramic water filters, manufactured 6.5 cm diameter ceramic water filter disks were used. Results showed that TPA can achieve a log bacterial reduction value of 10 while silver nanoparticles reached up to 2 log reduction using a initial concentration of bacteria of 10(10)-10(11)CFU/ml. Similarly, bacterial transport demonstrated that ceramic filter disks painted with TPA achieved a bacterial log reduction value of 6.24, which is about 2 log higher than the values obtained for disks painted with silver nanoparticles (bacterial log reduction value: 4.42). The release of both disinfectants from the ceramic materials to the treated water was determined measuring the effluent concentrations in each test performed. Regarding TPA, about 3% of the total mass applied to the ceramic disks was released in the effluent over 300 min, which is slightly lower than the release percentage for silver nanoparticles (4%). This study showed that TPA provides a comparable disinfection performance than silver nanoparticles in ceramic water filter. Another advantage of using TPA is the cost as the price of TPA is considerable lower than silver nanoparticles. In spite of the use of TPA in several medical related products, there is only partial information regarding the health risk associated with the ingestion of this compound. Additional long-term toxicological information for TPA should be evaluated before its future application in ceramic water filters.
载银纳米粒子和一种基于聚合物的季铵官能化硅倍半氧烷（聚（三羟基硅基）丙基二甲基十八烷基氯化铵（TPA））。本研究使用从位于危地马拉圣马太伊特兰的陶瓷过滤器工厂获得的粘土制造的陶瓷圆盘来评估这些化合物。本研究没有使用全尺寸的陶瓷水过滤器，而是使用了直径为 6.5 厘米的陶瓷水过滤器圆盘。结果表明，TPA 可以实现 10 的对数细菌减少值，而载银纳米粒子在初始细菌浓度为 10(10)-10(11)CFU/ml 时可达到 2 个对数减少。同样，细菌传输表明，用 TPA 涂覆的陶瓷过滤器圆盘实现了 6.24 的对数细菌减少值，这比用载银纳米粒子涂覆的圆盘获得的值高约 2 个对数（细菌对数减少值：4.42）。通过测量每个测试的流出物浓度来确定两种消毒剂从陶瓷材料释放到处理水中的情况。关于 TPA，在 300 分钟内，约有 3%的总质量释放到流出物中，略低于载银纳米粒子的释放百分比（4%）。本研究表明，TPA 在陶瓷水过滤器中提供了与载银纳米粒子相当的消毒性能。使用 TPA 的另一个优点是成本，因为 TPA 的价格明显低于载银纳米粒子。尽管 TPA 已在几种与医疗相关的产品中使用，但关于摄入这种化合物相关的健康风险的信息仅部分可用。在将 TPA 应用于陶瓷水过滤器之前，应该评估 TPA 的长期毒理学信息。
