Photocatalytic removal of the herbicide clopyralid from water
The stability of the herbicide clopyralid (3,6-dichloro-2-pyridinecarboxylic acid) was studied under different experimental conditions of pH, illumination and initial substrate concentration. It was found that in the pH interval from 1.0 to 9.0 in the presence/absence of daylight, clopyralid solutio...
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| Format: | Article |
| Language: | English |
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Serbian Chemical Society
2007-12-01
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| Series: | Journal of the Serbian Chemical Society |
| Subjects: | |
| Online Access: | http://www.shd.org.yu/JSCS/Vol72/No12/JSCS_V72_No12-29.pdf |
| _version_ | 1811316686686519296 |
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| author | BILJANA F. ABRAMOVIC VESNA B. ANDERLUH DANIELA V. ŠOJIĆ FERENC F. GAÁL |
| author_facet | BILJANA F. ABRAMOVIC VESNA B. ANDERLUH DANIELA V. ŠOJIĆ FERENC F. GAÁL |
| author_sort | BILJANA F. ABRAMOVIC |
| collection | DOAJ |
| description | The stability of the herbicide clopyralid (3,6-dichloro-2-pyridinecarboxylic acid) was studied under different experimental conditions of pH, illumination and initial substrate concentration. It was found that in the pH interval from 1.0 to 9.0 in the presence/absence of daylight, clopyralid solutions were stable for at least a period of two months. The kinetics of the photocatalytic degradation of clopyralid in aqueous suspensions of TiO2 (Degussa P25) under UV and visible light, as well as of direct photolysis using the same radiation sources, were also investigated. It was found that the rate of photocatalytic degradation in the presence of UV light was more than five times higher compared to direct photolysis, whereas in the presence of visible light, the corresponding rates of photocatalytic/photolytic degradation were much lower (more than 15 times). The reaction in the investigation concentration range is zero-order with respect to the degradation of the clopyralid pyridine moiety, with a reaction rate of 3.4×10−6 mol dm-3 min-1 and an adsorption coefficient of the substrate of 2.5×104 dm3 mol‑1. |
| first_indexed | 2024-04-13T11:53:44Z |
| format | Article |
| id | doaj.art-787bb55b608f4686b91faeb24d28a49f |
| institution | Directory Open Access Journal |
| issn | 0352-5139 |
| language | English |
| last_indexed | 2024-04-13T11:53:44Z |
| publishDate | 2007-12-01 |
| publisher | Serbian Chemical Society |
| record_format | Article |
| series | Journal of the Serbian Chemical Society |
| spelling | doaj.art-787bb55b608f4686b91faeb24d28a49f2022-12-22T02:47:58ZengSerbian Chemical SocietyJournal of the Serbian Chemical Society0352-51392007-12-01721214771486Photocatalytic removal of the herbicide clopyralid from waterBILJANA F. ABRAMOVICVESNA B. ANDERLUHDANIELA V. ŠOJIĆFERENC F. GAÁLThe stability of the herbicide clopyralid (3,6-dichloro-2-pyridinecarboxylic acid) was studied under different experimental conditions of pH, illumination and initial substrate concentration. It was found that in the pH interval from 1.0 to 9.0 in the presence/absence of daylight, clopyralid solutions were stable for at least a period of two months. The kinetics of the photocatalytic degradation of clopyralid in aqueous suspensions of TiO2 (Degussa P25) under UV and visible light, as well as of direct photolysis using the same radiation sources, were also investigated. It was found that the rate of photocatalytic degradation in the presence of UV light was more than five times higher compared to direct photolysis, whereas in the presence of visible light, the corresponding rates of photocatalytic/photolytic degradation were much lower (more than 15 times). The reaction in the investigation concentration range is zero-order with respect to the degradation of the clopyralid pyridine moiety, with a reaction rate of 3.4×10−6 mol dm-3 min-1 and an adsorption coefficient of the substrate of 2.5×104 dm3 mol‑1.http://www.shd.org.yu/JSCS/Vol72/No12/JSCS_V72_No12-29.pdfclopyralidphotocatalytic degradationTiO2 Degussa P25photolysiswater treatment |
| spellingShingle | BILJANA F. ABRAMOVIC VESNA B. ANDERLUH DANIELA V. ŠOJIĆ FERENC F. GAÁL Photocatalytic removal of the herbicide clopyralid from water Journal of the Serbian Chemical Society clopyralid photocatalytic degradation TiO2 Degussa P25 photolysis water treatment |
| title | Photocatalytic removal of the herbicide clopyralid from water |
| title_full | Photocatalytic removal of the herbicide clopyralid from water |
| title_fullStr | Photocatalytic removal of the herbicide clopyralid from water |
| title_full_unstemmed | Photocatalytic removal of the herbicide clopyralid from water |
| title_short | Photocatalytic removal of the herbicide clopyralid from water |
| title_sort | photocatalytic removal of the herbicide clopyralid from water |
| topic | clopyralid photocatalytic degradation TiO2 Degussa P25 photolysis water treatment |
| url | http://www.shd.org.yu/JSCS/Vol72/No12/JSCS_V72_No12-29.pdf |
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