Gas phase photocatalytic degradation on TIO2 pellets of volatile chlorinated organic compounds from a soil vapor extraction well |
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| Authors: | Suzuko Yamazaki‐Nishida Harry W. Read Joyce K. Nagano Tim Jarosch Carol Eddy Salvador Cervera‐March |
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| Affiliation: | 1. Water Science and Engineering Laboratory, Water Chemistry Program , University of Wisconsin‐Madison , Madison, Wl, 53706;2. Savannah River Technology Center, Environmental Sciences Section , Westinghouse Savannah River Company , Aiken, SC, 29808;3. Department of Chemical Engineering , University of Barcelona , Marti i Franques, 1, Barcelona, 08028, Spain |
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| Abstract: | The degradation of trichloroethylene (TCE, Cl2C=CHCl) and tetrachloroethylene (PCE, Cl2C=CCI2) in a gas stream from a soil vapor extraction (SVE) well was demonstrated with an annular photocatalytic reactor packed with porous TiO2 pellets in a field trial at the Savannah River Site in Aiken, SC. The TiO2 pellets were prepared using a sol‐gel method. The experiments were performed at 55 to 60°C using space times of 108 to 1010 g ? s ? mol‐1 for TCE and PCE. Chloroform (CHCl3) and carbon tetrachloride (CCl4) were detected as minor products from side reactions. On a molar basis, the amounts CCl4 and CHCl3 produced were about 2 and 0.2% of the reactants, respectively. |
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| Keywords: | gas phase photocatalysis titanium dioxide perchloroethylene soil vapor extraction soil remediation. |
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