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      Progress of Nanocomposite Membranes for Water Treatment

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          Abstract

          The use of membrane-based technologies has been applied for water treatment applications; however, the limitations of conventional polymeric membranes have led to the addition of inorganic fillers to enhance their performance. In recent years, nanocomposite membranes have greatly attracted the attention of scientists for water treatment applications such as wastewater treatment, water purification, removal of microorganisms, chemical compounds, heavy metals, etc. The incorporation of different nanofillers, such as carbon nanotubes, zinc oxide, graphene oxide, silver and copper nanoparticles, titanium dioxide, 2D materials, and some other novel nano-scale materials into polymeric membranes have provided great advances, e.g., enhancing on hydrophilicity, suppressing the accumulation of pollutants and foulants, enhancing rejection efficiencies and improving mechanical properties and thermal stabilities. Thereby, the aim of this work is to provide up-to-date information related to those novel nanocomposite membranes and their contribution for water treatment applications.

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          Most cited references243

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          Strain specificity in antimicrobial activity of silver and copper nanoparticles.

          The antimicrobial properties of silver and copper nanoparticles were investigated using Escherichia coli (four strains), Bacillus subtilis and Staphylococcus aureus (three strains). The average sizes of the silver and copper nanoparticles were 3 nm and 9 nm, respectively, as determined through transmission electron microscopy. Energy-dispersive X-ray spectra of silver and copper nanoparticles revealed that while silver was in its pure form, an oxide layer existed on the copper nanoparticles. The bactericidal effect of silver and copper nanoparticles were compared based on diameter of inhibition zone in disk diffusion tests and minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of nanoparticles dispersed in batch cultures. Bacterial sensitivity to nanoparticles was found to vary depending on the microbial species. Disk diffusion studies with E. coli and S. aureus revealed greater effectiveness of the silver nanoparticles compared to the copper nanoparticles. B. subtilis depicted the highest sensitivity to nanoparticles compared to the other strains and was more adversely affected by the copper nanoparticles. Good correlation was observed between MIC and MBC (r2=0.98) measured in liquid cultures. For copper nanoparticles a good negative correlation was observed between the inhibition zone observed in disk diffusion test and MIC/MBC determined based on liquid cultures with the various strains (r2=-0.75). Although strain-specific variation in MIC/MBC was negligible for S. aureus, some strain-specific variation was observed for E. coli.
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            A review of water treatment membrane nanotechnologies

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              Applications of nanotechnology in water and wastewater treatment.

              Providing clean and affordable water to meet human needs is a grand challenge of the 21st century. Worldwide, water supply struggles to keep up with the fast growing demand, which is exacerbated by population growth, global climate change, and water quality deterioration. The need for technological innovation to enable integrated water management cannot be overstated. Nanotechnology holds great potential in advancing water and wastewater treatment to improve treatment efficiency as well as to augment water supply through safe use of unconventional water sources. Here we review recent development in nanotechnology for water and wastewater treatment. The discussion covers candidate nanomaterials, properties and mechanisms that enable the applications, advantages and limitations as compared to existing processes, and barriers and research needs for commercialization. By tracing these technological advances to the physicochemical properties of nanomaterials, the present review outlines the opportunities and limitations to further capitalize on these unique properties for sustainable water management. Copyright © 2013 Elsevier Ltd. All rights reserved.
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                Author and article information

                Journal
                Membranes (Basel)
                Membranes (Basel)
                membranes
                Membranes
                MDPI
                2077-0375
                03 April 2018
                June 2018
                : 8
                : 2
                : 18
                Affiliations
                [1 ]Institute on Membrane Technology National Research Council, ITM-CNR, Via P. Bucci 17/C, 87036 Rende (CS), Italy; c.ursino@ 123456itm.cnr.it (C.U.); food.biotechnology88@ 123456gmail.com (R.C.-M.); e.drioli@ 123456itm.cnr.it (E.D.)
                [2 ]Department of Inorganic Technology, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
                [3 ]Center of Excellence in Desalination Technology, King Abdulaziz University, P.O. Box 80200, Jeddah 21589, Saudi Arabia; mbeirutty@ 123456kau.edu.sa
                [4 ]Mechanical Engineering Department, King Abdulaziz University, P.O. Box 80204, Jeddah 21589, Saudi Arabia
                Author notes
                Author information
                https://orcid.org/0000-0002-7657-3302
                https://orcid.org/0000-0003-1092-5368
                https://orcid.org/0000-0002-6441-2413
                https://orcid.org/0000-0003-3519-280X
                https://orcid.org/0000-0002-3347-0506
                Article
                membranes-08-00018
                10.3390/membranes8020018
                6027241
                29614045
                5e0648ea-5338-4a03-b93e-a366a4a7f510
                © 2018 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                : 21 February 2018
                : 29 March 2018
                Categories
                Review

                nanocomposite,mixed matrix membranes (mmms),water treatment,nanoparticles (nps),carbon nanotubes (cnts) zinc oxide (zno),graphene oxide (go),silver (ag),titanium dioxide (tio2)

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