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بیست و نهمین کنفرانس شیمی آلی ایران
Degradation of cefixime antibiotic in Aqueous Solution by Catalytic Ozonation Process
نویسندگان :
بلدا شیخ ( گروه شیمی، واحد گرگان، دانشگاه آزاد اسلامی، گرگان، ایران. ) , الهام تازیکه لمسکی ( گروه شیمی، واحد گرگان، دانشگاه آزاد اسلامی، گرگان، ایران. ) , یوسف دادبان شهامت ( مرکز تحقیقات بهداشت محیط، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی گلستان، گرگان، ایران )
کلید واژه ها :
Cefixime antibiotic،Catalytic ozonation،Response surface methodology.
چکیده مقاله :
Antibiotics are widely used in veterinary and medicine in the last few decades which presence of these compounds has made potential risks for aquatic and terrestrial organisms in the environment. Cefixime is also one of these antibiotics. The aim of this study was to investigate the removal efficiency of cefixime from synthetic sample using catalytic ozonation process with Mg-Al layered double hydroxides doped with zeolite. In this experimental and laboratory study MgAl-LDH/Zeolite nanocomposite was used in laboratory reactor and ozonation to remove cefixime. Effect of pH variables amount of nanocomposite, initial concentration of cefixime and reaction time were examined to find the maximum mineralization efficiency and response surface methodology based on central composite design was used to design experiments, analyze data and achieve optimal conditions. The maximum mineralization efficiency of cefixime under optimal conditions is 78%, which increases the target efficiency with increasing pH and contact time. Catalytic ozonation process with Mg-Al layered double hydroxides nanocomposite doped with zeolite can be significantly remove cefixime and is a suitable method to reduce this pollutant from water sources. Scheme: The specifications of the reactor used in this study 1- Oxygen source 2- Flowmeter 3- Ozone generator 4- Sampling valve 5- Contact reactor 6- Gas wash containing potassium iodide solution
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