Removal of Tetracycline from aqueous solution by Azolla, Fig leave, Egg shell and Egg membrane modified with iron oxide magnetite nanoparticles

Nowadays Antibiotic have been used in large amount to care animals and humans. Tetracycline(TC) is usedwidely as an antbiotic, so a lot of TC discharged to water environment. The adsorption of Tetracycline (TC) bymagnetite nanoparticlis loaded Egg shell (MNLES), Egg membrane (MNLEM), Azolla (MNLA) and Fig leave(MNLFL) as facile, economic and cheap sources of adsorbents were studied. MNLES, MNLEM, MNLA andMNLFL were prepared with chemical coprecipitation method and they were characterized with FT-IR, XRDand SEM techniques. Adsorbents dose, pH, and contact time were examined and optimized as variablesaffecting the drug removal. Drug adsorption process was studied from both kinetic and equilibrium points. Thekinetic of adsorption was examined by using pseudo-first order, pseudo-second order, intraparticle diffusion andElovich models. At optimum conditions, the sorption of the TC on the MNLES , MNLEM, MNLA and MNLFLwere best described by pseudo second-order model. Equilibrium data of MNLES for adsorption of TC werefitted well to the Freundlich isotherm more than Langmuir isotherm but the data of MNLEM, MNLA andMNLFL for adsorption of TC were fitted well to the Langmuir isotherm.The results showed that MNLEM can be used as efficient adsorbent for removal of TC from aqueous solutions.Also, it was found that MNLES and MNLFL have adsorption less than MNLEM and MNLA is not consideredas a good adsorbent for TC.

Keywords:

Tetracycline , Egg shell , Egg membrane , Azolla , Fig leave