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Journal of Scientific and Industrial Research (JSIR) >
JSIR Vol.70 [2011] >
JSIR Vol.70(09) [September 2011] >
| Title: | Degradation of pesticide by combined photofenton-ozonation process and study of its synergistic effect |
| Authors: | Rajeswari, R
Kanmani, S |
| Keywords: | Carbaryl
Combined photofenton-ozonation (PFO)
Ozonation
Photofenton
Synergistic effect |
| Issue Date: | Sep-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | 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/Fe2+/H2O2,UV /O3, Fe2+/H2O2, O3 and UV/Fe2+/H2O2/O3) were conducted under optimized conditions to prove
synergistic effect. Kinetic study revealed increased rate
constant in combined process (PFO, 0.0194 min-1) compared to
individual process (photofenton, 0.0120 min-1; ozonation, 0.0112 min-1). 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. |
| Page(s): | 784-788 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1084 (Online); 0022-4456 (Print) |
| Source: | JSIR Vol.70(09) [September 2011]
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