Department of Chemical and Metallurgical Engineering, Tshwane University of Technology, Pretoria, South Africa.
J Hazard Mater. 2012 May 30;217-218:133-40. doi: 10.1016/j.jhazmat.2012.03.004. Epub 2012 Mar 7.
This study demonstrates the use of silver nanoparticles coated resin beads in deactivating microbes in drinking water in a column filtration system. The coated resin beads are characterized using X-ray diffraction (XRD), Fourier transform infra-red (FT-IR), scanning electron microscope (SEM), transmission electron microscope (TEM) and energy dispersive spectroscopy (EDS) to confirm the functional groups, morphology and the presence of silver nanoparticles on the surface of the resin. The performance of the coated resin is evaluated as a function of bed mass, initial bacterial concentration and flow rate using Escherichia coli as model microbial contaminant in water. The survival curves of E. coli are expressed as breakthrough curves (BTCs), which are modeled using sigmoidal regression equations to obtain relevant rate parameters. The number of bed volumes processed at breakthrough point and capacity of the bed are used as performance indicators. Results show that performance increases with a decrease in initial bacterial concentration, an increase in flow rate and an increase in bed mass.
本研究展示了在柱式过滤系统中使用涂覆有银纳米粒子的树脂珠来灭活饮用水中的微生物。通过 X 射线衍射（XRD）、傅里叶变换红外（FT-IR）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和能谱（EDS）对涂覆有银纳米粒子的树脂珠进行了表征，以确认官能团、形态和树脂表面上银纳米粒子的存在。通过使用大肠杆菌作为水中模型微生物污染物，根据床质量、初始细菌浓度和流速评估涂覆树脂的性能。大肠杆菌的生存曲线表示为突破曲线（BTC），使用 S 型回归方程对其进行建模，以获得相关的速率参数。突破点处理的床体积数和床的容量用作性能指标。结果表明，随着初始细菌浓度的降低、流速的增加和床质量的增加，性能会提高。
