Abstract
Photocatalytic decomposition of butachlor using TiO2 (Degussa P-25) was investigated under solar irradiation. Effects of various physico chemical parameters on the degradation rate of butachlor were studied in aqueous solution. The optimized conditions were then applied for the treatment of butachlor spiked effluent and to decontaminate butachlor spiked ground water. Kinetic study was done by analyzing the residues at regular time intervals using High Performance Liquid Chromatographic technique. Rapid dissipation of herbicide was observed by using TiO2 (Degussa P-25) catalyst @ 0.5g/l TiO2 (Degussa P-25). The degradation rate of butachlor was found to follow the first order kinetics. From the investigations it was established that the herbicide butachlor was found to degrade within 30 hours completely in ground water when tested at the concentration 20µg/ml, with the optimum TiO2 amount 0.5g/l and at the temperature 40°C. When conducted the studies using LC/MS/MS for the identification of metabolites, several metabolites were observed in aqueous solutions due to the photocatalytic degradation of butachlor. The applicability of the method was studied using effluent samples collected from the herbicide manufacturing facility. Under the identical study period, 18 to 25% dissipation was observed in the effluent samples fortified with 20µg/ml of herbicide.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call