Photodegradation of dimethenamid-P in deionised and ground water
The study of photodegradation of dimethenamid-P herbicide was performed in deionised and ground water using TiO2 as a catalyst under UV light. The effect of electron acceptor (H2O2), scavenger of •OH radicals (C2H5OH) and scavenger of holes (NaCl and Na2SO4) as well as solution pH was analy...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Association of the Chemical Engineers of Serbia
2016-01-01
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| Series: | Chemical Industry and Chemical Engineering Quarterly |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1451-9372/2016/1451-93721500025G.pdf |
| Summary: | The study of photodegradation of dimethenamid-P herbicide was performed in
deionised and ground water using TiO2 as a catalyst under UV light. The
effect of electron acceptor (H2O2), scavenger of •OH radicals (C2H5OH) and
scavenger of holes (NaCl and Na2SO4) as well as solution pH was analyzed. The
photodegradation of dimethenamid-P was followed by HPLC. The formation of
transformation products was followed using high performance liquid
chromatography-electrospray mass spectrometry. Ion chromatography and total
organic carbon measurements were used for the determination of the
mineralization level. HPLC analysis showed the almost complete removal of
herbicide after 90 min in deionised and ground water, while total organic
carbon analysis showed that dimethenamid-P was mineralized 64 and 50 % in
deionised and ground water, respectively. The ion chromatography results
showed that the mineralization process leads to the formation of chloride,
sulphate and nitrate anions during the process. Transformation products were
identified and the degradation mechanism was proposed. [Projekat Ministarstva
nauke Republike Srbije, br. 172013] |
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| ISSN: | 1451-9372 2217-7434 |