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http://140.128.103.80:8080/handle/310901/22490
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| Title: | Photooxidation for degradation of trichloroethylene and perchloroethylene in contaminated gas streams: Free-radical reaction kinetics, mechanisms, product formation and product removal |
| Authors: | Den, W.a, Ravindran, V.b , Pirbazari, M.c |
| Contributors: | Department of Environmental Science and Engineering, Tunghai University |
| Date: | 20050313-- |
| Issue Date: | 2013-05-21T09:08:00Z (UTC)
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| Publisher: | San Diego, CA.; United States |
| Abstract: | UV photooxidation study was carried out for the decomposition of trichloroethylene (TCE) and perchloroethylene (PCE) and subsequent destruction of photooxidation products in a biotrickling filtration. The reactions were slower for PCE than for TCE under similar conditions, consistent with theoretical predictions. They were mediated by chlorine atom chain reactions and the inherently fast kinetics conferred efficiency and cost-effectiveness of the technology. The pathways for PCE and TCE manifested certain similarities and differences in product formations. The reaction pathways were studied by product analyses using GC-MS and FTIR spectroscopy. The products for TCE were phosgene, dichloroacetyl chloride (DCAC), low levels of trichloroacetyl chloride (TCAC), CO, and HCl while the products for PCE were phosgene, TCAC, low levels of DCAC, CO 2, and HCl. The acyl chlorides, DCAC and TCAC, were hydrolyzed to non-halogenated compounds, and phosgene was converted to CO 2 and HCl during biotrickling filtration and the organic hydrolysis products were completely destroyed by a combination of carbon adsorption and microbial degradation. The GC-MS analysis of biotrickling filter effluent confirmed that there were no detectable organics. This is an abstract of a paper presented at the 229th ACS National Meeting (San Diego, CA 3/13-17/2005). |
| Relation: | ACS National Meeting Book of Abstracts
Volume 229, Issue 1, 2005, Pages ENVR-21 |
| Appears in Collections: | [環境科學與工程學系所] 會議論文
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