Abstract
Incorporation of nanoparticles (NPs) into the water treatment materials significantly enhanced the decontamination efficacy. Nanoparticle release that has been neglected, however, can result in undesirable environmental and health effects over time. In this study, for the first time, polyvinylidene fluoride (PVDF) micropore membrane acted as a cheap, and environmentally friendly adsorbent for the capture of NPs from water has been reported. The NP removal behaviors of four commercial micropore membranes, including polyvinylidene fluoride (PVDF), nylon, mixed cellulose ester (MCE), and polyethersulfone (PES), were investigated by batch adsorption experiments using gold nanoparticles (AuNPs) and silver nanoparticles (AgNPs) as NP models. It was found that PVDF micropore membrane exhibited the highest removal capacity. Meanwhile, the PVDF micropore membrane can also be used as a filter for continuous treatment of water samples containing AuNPs, AgNPs, ZrO2-NPs, ZnO-NPs, Fe2O3-NPs, and NiO-NPs. Furthermore, the feasibility was verified by testing the method to waters treated with a commercial material with incorporation of NPs. Collectively, the PVDF micropore membrane is a potential adsorbate for the capture of NPs from water, which is a handy application that can provide significant improvements to water treatment process and enhance the biological safety of water supply.
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