%0 Journal Article
%T Optimization of Alachlor Photocatalytic Degradation with Nano-TiO2 in Water under Solar Illumination: Reaction Pathway and Mineralization
%A Hideyuki Katsumata
%A Ikki Tateishi
%A Mai Furukawa
%A Md. Ashraful Islam Molla
%A Satoshi Kaneco
%J -
%D 2018
%R https://doi.org/10.3390/cleantechnol1010010
%X Abstract In the present study, the photocatalytic degradation of alachlor was investigated using TiO 2 under sunlight irradiation. The effects of some operational parameters, such as photocatalyst concentration, temperature, pH, sunlight intensity and irradiation time, were optimized. The kinetics of photodegradation was found to follow a pseudo-first-order kinetic law, and the rate constant at optimal condition is 0.245 min £¿1. The activation energy ( E a) is 6.4 kJ/mol. The alachlor mineralization can be completed under sunlight irradiation after 10 h. The formations of chloride, nitrate and ammonium ions are observed during the photocatalytic degradation. The eight photoproducts were identified by the GC¨CMS technique. The photodegradation reaction pathways are proposed based on the evidence of the detected photoproducts and the calculated frontier electron densities of the alachlor structure. The photocatalytic degradation treatment for the alachlor wastewater under solar irradiation is simple, convenient and low cost. View Full-Tex
%K photocatalytic degradation
%K reaction pathways
%K mineralization
%K alachlor
%K sunlight
%U https://www.mdpi.com/2571-8797/1/1/10