DEVELOPMENT OF CELLULOSE ACETATE MEMBRANES CONTAINING NANOPARTICLES FOR WATER APPLICATIONS

作者: A. V. Machado , Joana Luísa Padrão Cruz Costa e Silva , M. Oliveira , Ana S. Abreu

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摘要: The growth of human population and inherent activities, the improper industrialization practices, direct addition materials TO waterway, excessive use fertilizers containing phosphates to increase production crops are main sources for high input in water bodies. These effects have been causing eutrophication, bacterial contamination water. In fact, bacteria present can cause harmful disease, sickness or other problems being. Moreover, excess aquatic system induces plants, which consume oxygen body, thereby creating state hypoxia, causes a reduction specific fish animals. Therefore, removal from eutrophic waters crucial avoid health problems, especially near urban areas[1]. most common way purify is through membrane separation processes, cellulose acetate (CA) membranes used reverse osmosis [2] converting impaired into fresh-water. However, several components be incorporated structure allow development different applications[3]. work aims develop hybrid based on CA with embedded silver and/or aluminium nanoparticles, remediation contaminated environments microorganism, also phosphate ion. were obtained by solution casting, where nanoparticles chemical reduced in-situ. Silver (Ag-NPs) synthesized using nitrate sodium borohydride as reducing agent. Otherwise, (Al-NPs) isopropoxide starting precursor presence acid. detection Al-NPs was carried out FTIR spectra analysis, showed that Al-O bonds formed between CA. study phosphorus adsorption kinetics proven efficient phosphorus. This considerable ability remove ions aqueous solutions at low nanoparticle content CA/Ag-NPs matrices. In-situ developed good antimicrobial behaviour preventing microorganisms. results indicate CA/Ag-NPs/Al-NPs could potential resources.

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