Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4412913 | Chemosphere | 2008 | 8 Pages |
Abstract
Photocatalytic degradation and mineralization of pesticides are studied over TiO2 supported mesoporous SBA-15 composite system using solar light. TiO2 is immobilized over SBA-15 by solid sate dispersion method. The catalysts are characterized by XRD, surface area, UV-Vis diffused reflectance spectra, SEM and TEM. The detailed photocatalytic degradation studies are carried out over TiO2, SBA-15 and different TiO2 wt% supported SBA-15. The activity evaluation parameters such as catalyst amount, pH, and pollutant initial concentration are studied taking isoproturon as a model compound and established conditions for pesticide degradation. The optimum degradation is achieved over 10Â wt% TiO2/SBA-15 within 30Â min and the reaction is following pseudo-first order kinetics. The isoproturon mineralization is monitored with TOC reduction and it takes around 9Â h for disappearance. The commercial pesticide solutions containing imidacloprid and phosphamidon are also successfully degraded over these composites with the established conditions. The data indicates that 10Â wt% TiO2/SBA-15 composite is an effective and highly active system for the pesticide degradations.
Related Topics
Life Sciences
Environmental Science
Environmental Chemistry
Authors
M.V. Phanikrishna Sharma, V. Durga Kumari, M. Subrahmanyam,