Laser-induced degradation of organophosphorus compounds
The object of our research has been laser-induced photo-oxidation of organophosphorus compounds in aqueous media. A XeCl excimer laser with a pulse energy of up to 150 mJ and wavelength of 308 nm has been used as a light source. The research comprised the influence of irradiation conditions on pesti...
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| Format: | Article |
| Language: | English |
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Wiley
2002-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/S1110662X02000077 |
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| _version_ | 1841524749921943552 |
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| author | Polonca Trebše Mladen Franko |
| author_facet | Polonca Trebše Mladen Franko |
| author_sort | Polonca Trebše |
| collection | DOAJ |
| description | The object of our research has been laser-induced photo-oxidation of organophosphorus compounds
in aqueous media. A XeCl excimer laser with a pulse energy of up to 150 mJ and wavelength of
308 nm has been used as a light source. The research comprised the influence of irradiation conditions on
pesticide degradation (number of laser pulses, pulse energy) and decomposition efficiency. The time between
irradiation and sample isolation ranged from 5 min to 24 hrs. Rapid decomposition has been achieved within
two hours following the irradiation for the range of concentrations limited by the solubility of pesticide
(up to 40 mgL-1). 1 mL samples required less than 120 mJ of total irradiation energy at 308 nm, which was
delivered to the sample in time intervals shorter then 1 second when catalysts, such as titanium dioxide
and hydrogen peroxide were applied. Similar degradation efficiency was also obtained without the addition
of catalysts when higher irradiation energies were used. The compounds detected in the irradiated samples
suggest that diazinon is converted directly into 2-isopropyl-4-methyl-6-hydroxypyrimidine without the formation
of more toxic diazoxon. This transformation involves oxidation of the sulphur atom to the sulphate
anion. |
| format | Article |
| id | doaj-art-e7b099065d3143fca85db88e77d53325 |
| institution | Kabale University |
| issn | 1110-662X |
| language | English |
| publishDate | 2002-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-e7b099065d3143fca85db88e77d533252025-02-03T05:47:32ZengWileyInternational Journal of Photoenergy1110-662X2002-01-0141414410.1155/S1110662X02000077Laser-induced degradation of organophosphorus compoundsPolonca Trebše0Mladen Franko1Nova Gorica Polytechnic, Laboratory for Environmental Research, P.O.B. 301, Nova Gorica 5001, SloveniaNova Gorica Polytechnic, Laboratory for Environmental Research, P.O.B. 301, Nova Gorica 5001, SloveniaThe object of our research has been laser-induced photo-oxidation of organophosphorus compounds in aqueous media. A XeCl excimer laser with a pulse energy of up to 150 mJ and wavelength of 308 nm has been used as a light source. The research comprised the influence of irradiation conditions on pesticide degradation (number of laser pulses, pulse energy) and decomposition efficiency. The time between irradiation and sample isolation ranged from 5 min to 24 hrs. Rapid decomposition has been achieved within two hours following the irradiation for the range of concentrations limited by the solubility of pesticide (up to 40 mgL-1). 1 mL samples required less than 120 mJ of total irradiation energy at 308 nm, which was delivered to the sample in time intervals shorter then 1 second when catalysts, such as titanium dioxide and hydrogen peroxide were applied. Similar degradation efficiency was also obtained without the addition of catalysts when higher irradiation energies were used. The compounds detected in the irradiated samples suggest that diazinon is converted directly into 2-isopropyl-4-methyl-6-hydroxypyrimidine without the formation of more toxic diazoxon. This transformation involves oxidation of the sulphur atom to the sulphate anion.http://dx.doi.org/10.1155/S1110662X02000077 |
| spellingShingle | Polonca Trebše Mladen Franko Laser-induced degradation of organophosphorus compounds International Journal of Photoenergy |
| title | Laser-induced degradation of organophosphorus compounds |
| title_full | Laser-induced degradation of organophosphorus compounds |
| title_fullStr | Laser-induced degradation of organophosphorus compounds |
| title_full_unstemmed | Laser-induced degradation of organophosphorus compounds |
| title_short | Laser-induced degradation of organophosphorus compounds |
| title_sort | laser induced degradation of organophosphorus compounds |
| url | http://dx.doi.org/10.1155/S1110662X02000077 |
| work_keys_str_mv | AT poloncatrebse laserinduceddegradationoforganophosphoruscompounds AT mladenfranko laserinduceddegradationoforganophosphoruscompounds |