Bougarrani Salma, El Azzouzi Laila, Akel Soukaina, Latrach Lahbib, Bouziani Asmae, El Azzouzi Mohammed
Acta Chim Slov. 2018 Jun;65(2):470-474. doi: 10.17344/acsi.2018.4297.
This study investigates the degradation of imazapyr herbicide from wastewater by photocatalytic ozonation using TiO2 as a semiconductor. Effects of operational parameters on imazapyr removal efficiency including TiO2 dosing, initial herbicide concentration and pH were also studied. Obtained results showed that more than 90% of removal efficiency representing the disappearance of imazapyr was maintained until 7 µM in the presence of 200 mgL-1of UV100-TiO2. Otherwise, the degradation of imazapyr followed the first-order kinetics with a photocatalytic rate constant of 0.247 min-1, and complete degradation was achieved within 20 min using photocatalytic ozonation for 5 µM of Imazapyr at pH 7.
本研究考察了以TiO₂作为半导体通过光催化臭氧化作用对废水中的咪唑乙烟酸除草剂进行降解的情况。还研究了操作参数（包括TiO₂投加量、初始除草剂浓度和pH值）对咪唑乙烟酸去除效率的影响。所得结果表明，在存在200 mgL⁻¹的UV100-TiO₂时，直至7 µM，咪唑乙烟酸去除效率超过90%（即咪唑乙烟酸消失）得以维持。否则，咪唑乙烟酸的降解遵循一级动力学，光催化速率常数为0.247 min⁻¹，在pH值为7时，使用光催化臭氧化作用对5 µM的咪唑乙烟酸进行处理，20分钟内可实现完全降解。
