Decontamination of Water Using Adsorption and Photocatalysis (Preprint)
Journal article preprint
MICHIGAN TECHNOLOGICAL UNIV HOUGHTON DEPT OF CHEMISTRY AND CHEMICAL ENGINEERING
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A novel treatment strategy employing adsorption and solar assisted photocatalytic processes was field tested at Tyndall Air Force Base, Florida for the removal and destruction of organic contaminants in groundwater. The adsorbents were impregnated with photoactive catalysts and used in packed beds to remove the pollutants from the water stream for 18 hours. The spent adsorbents were regenerated for 6 hours by passing hot water in the presence of sunlight. The desorbed organics were destroyed using fixed bed photocatalysis. The process was examined for 10 cycles of adsorption and regeneration for treatment of water contaminated with BTEX benzene, toluene, ethylbenzene, o-xlyene, m-xylene, and p-xylene compounds. The efficiency ratio of amount or organics removed to amount of organics adsorbed of the process to regenerate the adsorbents was examined for each cycle. A laboratory study was also conducted under controlled conditions using tetrachloroethylene as a model compound to examine the regeneration efficiency for 7 cycles of adsorption and regeneration.
- Physical Chemistry
- Water Pollution and Control