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Microwave Assisted Catalytic Degradation of Traces of RhodamineB in Water in Presence of H 2 O 2
| Content Provider | Semantic Scholar |
|---|---|
| Author | Gayathri, Prakasam Lekshmi, K. P. Vidya Yesodharan, Suguna Yesodharan, E. P. |
| Copyright Year | 2014 |
| Abstract | The degradation of trace amounts of the cationic dye RhodamineB (RhB) pollutantin water in the presence and absence of catalystis investigated undermicrowave (MW) irradiation.The degradation is much faster compared to identical thermal conditions thus suggesting that the MW effect is not just heating the reaction system. The presence of semiconductor oxide catalyst ZnO which is known to enhance the degradation of many organic chemical pollutants photocatalyticallyenhances the degradation in presence of MW as well. Addition of H2O2 enhances the MW-assisted degradation significantly in the presence as well as absence of catalyst. The increased efficiency can be attributed to increased formation of reactive free radicals and their interaction with the dye. The MW radiation may not be affecting the surface characteristics of the semiconductor as in the case of other AOPs. The effect of different parameters, viz. catalyst dosage, concentration of the dye, pH, MW power and H2O2 concentration on the degradation rate is evaluated and optimum parameters for the mineralization of the pollutant are identified.The degradation is favored under extreme acidic and alkaline conditions in both thermal and MW processes. There is considerable synergy in the MW/ZnO/H2O2 process compared to the respective individual processes. Key words-Hydrogen peroxide, microwave radiation, rhodamine B,zinc oxide. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.iosrjournals.org/iosr-jac/papers/ICETEM/IOSR-JAC-01.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
