Degradation of chlorinated benzaldehydes in aqueous solutions by UV-irradiation
Photoinduced degradation of chlorinated benzaldehydes was investigated using UV light with λ = 253.7 nm in aerated aqueous solutions. Substrate degradation rate as expressed by first order reaction kinetics revealed rate constants, k; 7.45×10−3 min-1, 3.90×10−3 min-1 and 3.90×11−2 min-1 for 2- chlor...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Hindawi Limited
2002-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/S1110662X02000156 |
| Summary: | Photoinduced degradation of chlorinated benzaldehydes was investigated using UV light with
λ = 253.7 nm in aerated aqueous solutions. Substrate degradation rate as expressed by first order reaction
kinetics revealed rate constants, k; 7.45×10−3 min-1, 3.90×10−3 min-1 and 3.90×11−2 min-1 for 2-
chlorobenzaldehyde, 3-chlorobenzaldehyde and 4-chlorobenzaldehyde respectively. The decomposition of
the substrates was related to the formation of chloride and formaldehyde by homolytic cleavage processes.
initial quantum yields and photochemical “GiPH -values” are reported for the degradation of the substrates.
Based on the qualitative HPLC analysis, a probable reaction mechanism for the photoinduced degradation
of chlorinated benzaldehydes is also presented. |
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| ISSN: | 1110-662X |