In the pursuit of finding superior methods to remove pathogens from drinking water, this study examines the adsorption of a non-enveloped, mammalian virus to highly charged nanofibers. N-[(2-Hydroxyl-3-trimethylammonium) propyl] chitosan (HTCC) nanofibers were synthesized by the addition of a quaternary amine to chitosan. HTCC was blended with polyvinyl alcohol (PVA) to produce nanofibers by electrospinning. The nanofibers were stabilized against water by crosslinking with glutaraldehyde. When studied in the range of 100-200nm in diameter, larger fibers were able to adsorb about 90% more virus than smaller fibers. The kinetics of the adsorption was modeled with pseudo-first order kinetics and equilibrium was achieved in as little as 10min. Equilibrium adsorption was modeled with the Freundlich isotherm with a Freundlich constant of 1.4. When the Freundlich constant deviates from 1, this demonstrates that there is heterogeneity at the adsorption surface. The heterogeneity likely occurs at the nanofiber surface since a polymeric blend of two polymers was used to electrospin the nanofibers. The model mammalian virus, porcine parvovirus (PPV), has a fairly homogeneous, icosahedral protein capsid available for adsorption. The fast adsorption kinetics and high capacity of the nanofibers make HTCC/PVA a potential filter material for the removal of pathogens from drinking water.

译文

为了寻找从饮用水中去除病原体的优质方法,本研究研究了一种无包膜的哺乳动物病毒对高电荷纳米纤维的吸附。通过向壳聚糖中添加季胺来合成N-[(2-羟基-3-三甲基铵) 丙基] 壳聚糖 (HTCC) 纳米纤维。将HTCC与聚乙烯醇 (PVA) 共混,通过静电纺丝生产纳米纤维。通过与戊二醛交联,使纳米纤维对水稳定。当在直径为100-200nm的范围内进行研究时,较大的纤维比较小的纤维能够吸附约90% 多的病毒。用伪一级动力学对吸附动力学进行建模,并在10分钟内实现平衡。用Freundlich等温线模拟平衡吸附,Freundlich常数为1.4。当Freundlich常数偏离1时,这表明吸附表面存在异质性。由于使用两种聚合物的聚合物共混物对纳米纤维进行电自旋,因此异质性可能发生在纳米纤维表面。模型哺乳动物病毒猪细小病毒 (PPV) 具有相当均匀的二十面体蛋白衣壳,可用于吸附。纳米纤维的快速吸附动力学和高容量使HTCC/PVA成为去除饮用水中病原体的潜在过滤材料。

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