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TUNABLE NANOCOMPOSITE MEMBRANES FOR WATER REMEDIATION AND SEPARATIONS
Hernandez Sierra, Sebastian, Ph.D. dissertation, University of Kentucky, 281 pp, 2017
Hydrogel-membrane systems with Fe/Pd nanoparticles were studied throughout the reduction of TCE. The work demonstrated an effective improvement in TCE reduction by variation of the supporting membrane types and functionalization (polymerization and nanoparticle synthesis) processes. The TCE normalized dechlorination rates were 3 times greater for hollow fiber membranes and 8 times greater for sponge-like flat sheet membranes than previous studies. For membrane-supported Fe/Pd nanoparticles by redox functionalization, the dechlorination rates were similar to previous works in flat sheet membranes, and for the redox-polymerized hydrogel, the dechlorination rates achieved the highest results: 1.3 times the rates of solution-phase nanoparticles and 10 times the rate values of the membranes. All supports showed nonsignificant nanoparticle loss (up to 1%). Up to 80% of reduction was achieved within 2 hours, with chloride production near to stoichiometric values (3:1), demonstrating absence of intermediates. http://uknowledge.uky.edu/cme_etds/72
Hydrogel-membrane systems with Fe/Pd nanoparticles were studied throughout the reduction of TCE. The work demonstrated an effective improvement in TCE reduction by variation of the supporting membrane types and functionalization (polymerization and nanoparticle synthesis) processes. The TCE normalized dechlorination rates were 3 times greater for hollow fiber membranes and 8 times greater for sponge-like flat sheet membranes than previous studies. For membrane-supported Fe/Pd nanoparticles by redox functionalization, the dechlorination rates were similar to previous works in flat sheet membranes, and for the redox-polymerized hydrogel, the dechlorination rates achieved the highest results: 1.3 times the rates of solution-phase nanoparticles and 10 times the rate values of the membranes. All supports showed nonsignificant nanoparticle loss (up to 1%). Up to 80% of reduction was achieved within 2 hours, with chloride production near to stoichiometric values (3:1), demonstrating absence of intermediates. http://uknowledge.uky.edu/cme_etds/72
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