Mohammad Javad Ebrahimi Zarandi - Department of Chemistry, North Tehran Branch, Islamic Azad University, Tehran, Iran
Azita Khosravan - Department of New Materials, Institute of Science and High Technology and Environmental Science, Graduate University of Advanced Technology, Kerman, Iran.
Mahmoud Reza Sohrabi - Department of Chemistry, North Tehran Branch, Islamic Azad University, Tehran, Iran
Morteza Khosravi - Department of Chemistry, North Tehran Branch, Islamic Azad University, Tehran, Iran

In this study magnetic nanoparticles have been synthesized by co-precipitation method. Fe3O4 supported activated carbon is used for the removal copper ions in aqueous solution. The effect of parameters such as pH, adsorbent dosage and initial concentration Cu (II) on the removal process are investigated. For equilibrium studies, three isotherm models, namely Langmuir, Freundlich and Temkin are used. It is found that Temkin is fitted very well with the experimental data. In the kinetics studies, pseudo-first order and pseudo-second order model are tested. The pseudo-first order equation provides the best correlation with the obtained data. Optimum conditions for Cu (II) ions in aqueous solution removal were found to be pH of 7, adsorbent dosage 0.1g and initial concentration Cu (II) 10 mgL-1.

kinetics, isotherms model, copper ions, magnetic nanopaticles