Author(s): Asthana Shrishti, Pal Shantanu Kumar and Sharma Monika
The application of nanoscale materials and structures, usually ranging from 1 to 100 nanometers (nm), is an emerging area of nanoscience and nanotechnology. The present study has been planned with the objective that photo catalytic process is considered of its simplicity, low cost, ease of controlling parameters and their high efficiency in degrading recalcitrant organic and inorganic substances in aqueous systems, and they are being increasingly utilized. In present study the photo catalytic degradation of detergent like CPC (Cetylpyridinium Chloride) was studied by a batch process using zinc oxide nanoparticles the parameters such as effect of UV light, pH, catalyst loading and oxidants. The results of the present study demonstrated that CPC is readily and rapidly degraded in aqueous solution by Vis/zinc oxide nanoparticles in a relatively short time of about 60 min after selection of desired operational parameters (pH=8.0, ZnO NPs=40mg/100ml, [CPC]= 9.0 x 10-5 , [H2O2 ]= 8 x 10-5mol dm-3 .the addition of oxidants like H2O2 andK2S2O8 into illuminated ZnO NPs suspension, a synergistic effect was observed leading to an enhancement of the process except of the excessive amount of H2O2 and K2S2O8 which caused a decreased rate of reaction.