Abstract
Ultraviolet (UV) irradiation (253.7 nm) in the presence of hydrogen peroxide (H 2O 2) was used to decompose aqueous ametryn. The concentrations of ametryn were measured with time under various experiment conditions. The investigated factors included H 2O 2 dosages, initial pH, initial ametryn concentrations, and a variety of inorganic anions. Results showed that ametryn degradation in UV/H 2O 2 process was a pseudo-first-order reaction. Removal rates of ametryn were greatly affected by H 2O 2 dosage and initial concentrations of ametryn, but appeared to be slightly influenced by initial pH. Furthermore, we investigated the effects of four anions (SO 4 2−, Cl −, HCO 3 −, and CO 3 2−) on ametryn degradation by UV/H 2O 2. The impact of SO 4 2− seemed to be insignificant; however, Cl −, HCO 3 −, and CO 3 2− considerably slowed down the degradation rate because they could strongly scavenge hydroxyl radicals (OH ) produced during the UV/H 2O 2 process. Finally, a preliminary cost analysis revealed that UV/H 2O 2 process was more cost-effective than the UV alone in removal of ametryn from water.
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.
