Degradation of pesticide by combined photofenton-ozonation process and study of its synergistic effect
IR@NISCAIR: CSIR-NISCAIR, New Delhi - ONLINE PERIODICALS REPOSITORY (NOPR)
View Archive Info| Field | Value | |
| Title |
Degradation of pesticide by combined photofenton-ozonation process and study of its synergistic effect
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| Creator |
Rajeswari, R
Kanmani, S |
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| Subject |
Carbaryl
Combined photofenton-ozonation (PFO) Ozonation Photofenton Synergistic effect |
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| Description |
784-788
This study presents degradation of pesticide, carbaryl, by combined photofenton-ozonation (PFO) process. Experiments were conducted under pH (3-9), ferrous ion dosage (0-600 mg/l), hydrogen peroxide (0-4 g/l) and ozone dosages (0.12-0.57 g/h) for optimized reaction conditions of carbaryl degradation. Five experimental sets (UV/Fe<sup>2+</sup>/H<sub>2</sub>O<sub>2</sub>,UV /O<sub>3</sub>, Fe<sup>2+</sup>/H<sub>2</sub>O<sub>2</sub>, O<sub>3</sub> and UV/Fe<sup>2+</sup>/H<sub>2</sub>O<sub>2</sub>/O<sub>3</sub>) were conducted under optimized conditions to prove synergistic effect. Kinetic study revealed increased rate constant in combined process (PFO, 0.0194 min<sup>-1</sup>) compared to individual process (photofenton, 0.0120 min<sup>-1</sup>; ozonation, 0.0112 min<sup>-1</sup>). Presence of inorganic ions such as nitrate indicated fragmentation of active pesticide structure. Complete removal of parent carbaryl and 86% mineralization was achieved at the end of 180 min treatment with combined processes. |
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| Date |
2011-08-26T04:26:32Z
2011-08-26T04:26:32Z 2011-09 |
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| Type |
Article
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| Identifier |
0975-1084 (Online); 0022-4456 (Print)
http://hdl.handle.net/123456789/12603 |
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| Language |
en_US
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| Rights |
<img src='http://nopr.niscair.res.in/image/cc-license-sml.png'> <a href='http://creativecommons.org/licenses/by-nc-nd/2.5/in' target='_blank'>CC Attribution-Noncommercial-No Derivative Works 2.5 India</a>
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| Publisher |
NISCAIR-CSIR, India
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| Source |
JSIR Vol.70(09) [September 2011]
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