Abstract
In the present study, the photocatalytic degradation of alachlor was investigated using TiO2 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 (Ea) 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–MS 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.
Highlights
Alachlor (IUPAC name: 2-chloro-N-(2,6-diethylphenyl)-N-(methoxymethyl) acetamide, M.W. = 269.77 g/mol, Figure 1) is a chloroacetanilide herbicide that is applied to the soil to control annual grasses and broadleaf weeds [1]
Under sunlight illumination, various factors, including photocatalyst irradiation forusing min, indicating that alachlor has degraded in the presence of nano-TiO2 particles with dosage, temperature, pH, light intensity and to illumination time, were optimized the sunlight illumination
The solar photocatalytic purification of water containing alachlor was performed in titanium
Summary
More recent research efforts have focused on several treatment methods, including ozonation [9], photolysis and photocatalysis [10], photo-Fenton degradation [11], hydrodynamic cavitation [1] and sonochemical reactors [12] Among these methods, photocatalytic processes offer many advantages for the removal of organic pollutants, such as complete oxidation, no formation of polycyclized products, availability of highly active and affordable catalysts and oxidation of pollutants in the ppb range [13]. In the present work, the photocatalytic degradation of alachlor inofwater under solar rarely studied. In the present work, the photocatalytic degradation alachlor in water irradiation nano-TiO was investigated. The effect of factors, including initial of nano-TiO2 , pH of solution, temperature, intensitylight and intensity irradiation time, on the degradation concentration of nano-TiO.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
