摘要
研究了盐酸四环素的光催化降解行为,结果表明四环素光催化降解反应符合一级反应动力学方程,吸附过程为整个光催化降解的控制步骤,推断四环素的主要降解途径是吸附在二氧化钛(TiO2)表面发生光催化氧化反应.同时,通过对四环素与磺胺甲唑或阿莫西林混合样品的降解实验表明,改变pH、TiO2投加量等因素,两种抗生素的降解表现出了明显的选择性.
The photocatalytic-degradation behavior of tetracycline hydrochloride （TTC） was studied. The catalyst used was photosensitive semiconductor titanium dioxide （TiO2 ）. The results showed that the photocatalytic degradation of TTC was well fitted to first order reaction kinetics model, and the adsorption was the control step of the whole photocatalytic-degradation process, indicating that the main degradation path was the photocatalytic reaction of TTC adsorbed on the surface of TiO2. Besides, through photocatalytic- degradation of the mixed solution of TTC and sulfamethoxazole or amoxicillin, the degradation of the two antibiotics showed obvious selectivity when the pH, TiO, dosage and other conditions were changed.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2014年第2期619-625,共7页
Environmental Science
基金
国家自然科学基金项目(51278353)
国家科技支撑计划项目(2012BAJ25B07)
关键词
四环素
光催化降解
选择性
二氧化钛
吸附
tetracycline hydrochloride （TTC）
photocatalytic degradation
selectivity
titanium dioxide （TiO2）
adsorption
