000011182 001__ 11182
000011182 005__ 20150429092418.0
000011182 037__ $$aTAZ-TFM-2013-263
000011182 041__ $$aeng
000011182 1001_ $$aSinclair, Terica Raquel
000011182 24500 $$aHigh Speed Sterilization of Water using Cellulose Grafted Membranes with Metallic Nanoparticles
000011182 260__ $$aZaragoza$$bUniversidad de Zaragoza$$c2013
000011182 506__ $$aby-nc-sa$$bCreative Commons$$c3.0$$uhttp://creativecommons.org/licenses/by-nc-sa/3.0/
000011182 520__ $$aThe removal of bacteria and other organisms from water is an extremely important process, not only for drinking and sanitation but also industrially as bio-fouling is a commonplace and serious problem. This project presents a cellulose membrane filter grafted with silver nanoparticles for the high speed sterilization of water.  In order to study the antimicrobial effects of silver nanoparticles, silver nano wires and nano spheres were synthesized , dispersed in water and  characterized by  Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) to reveal their formation and corresponding morphologies, dynamic light scattering (DLS) particle size analyser for particle size distribution, RadWag for concentration and finally Ultraviolet visible (UV-vis) scanning spectrophotoscopy to detect the distinct spectrum of the silver nanoparticles produced. These nanoparticles were then covalently bonded to commercially available cellulose filters, and functionalized by either thiol or amine groups. Followed by characterization by HR(S)-TEM, FE-SEM, energy-dispersive X-ray spectroscopy (EDXS), inductively coupled plasma atomic emission spectroscopy (ICP-AES),  Attenuated total reflection Fourier-transform infrared (ATR FT-IR) to reveal that the cellulose membranes were effectively modified by the thiol or amine groups and highly loaded with well dispersed nanoparticles. As well as X-ray photoelectron spectroscopy (XPS) analysis was used showed that the nanoparticles were immobilized in the membrane by a stable covalent bond with the respective functional groups. The resulting cellulose-metal membranes were subjected to mechanical release testing, thus proving their robustness and suppression to release of the nanoparticles from their cellulose backbone. The metal cellulose filters showed high antimicrobial activity in excess of 99.9% growth inhibition against E. coli a member of the total coliform group. Thus we anticipate our filters with their high antibacterial property and durability can be produced in a cost effective manner and if developed is capable of producing affordable, clean and safe drinking water.
000011182 521__ $$aMaster Erasmus Mundus en Ingeniería de Membranas
000011182 540__ $$aDerechos regulados por licencia Creative Commons
000011182 700__ $$aArruebo Gordo, Manuel$$edir.
000011182 7102_ $$aUniversidad de Zaragoza$$b $$c
000011182 8560_ $$f677644@celes.unizar.es
000011182 8564_ $$s5660638$$uhttps://zaguan.unizar.es/record/11182/files/TAZ-TFM-2013-263.pdf$$yMemoria (eng)$$zMemoria (eng)
000011182 909CO $$ooai:zaguan.unizar.es:11182$$pdriver$$ptrabajos-fin-master
000011182 950__ $$a
000011182 980__ $$aTAZ$$bTFM$$cCIEN