Abbas Heshmati Jannat Magham - Chemistry department, Payame Noor University, ۱۹۳۹۵-۴۶۹۷ Tehran, I. R. of IRAN
Ali Morsali - Chemistry department, Faculty of science, Islamic Azad University, Mashhad branch, Mashhad, I. R. of IRAN
Zarrin Es haghi - Chemistry department, Payame Noor University, ۱۹۳۹۵-۴۶۹۷ Tehran, I. R. of IRAN

Magnetite nanoparticles (NPs) has been successfully synthesized in presence of low frequency ultrasonic waves and then characterized. It has been used as adsorbent for Bromophenol Blue (BPB) and Chlorophenol Red (CPR) as an Organic Pollutants. Langmuir and Fruendlich isotherms were choice and tested to fit by using different initial concentrations of BPB and CPR as a model compound. It was found that the Freundlich isotherm model could be best defined experimental data in comparison withLangmuir. Both of pollutants have big molecular structure that formed strong Van der walls forces that lead to multi-layered adsorption then Freundlich isotherm could be worked well. Also the adsorption rates were compared. It was be found BPB were more adsorbed than CPR. It can be demonstrated by more stable coupled bond that were formed between pollutants and NPs. BPB have more unpaired electrons then can be form more bonds to NPs

Ultrasound; Synthesis; Magnetite Nanoparticle; Adsorption; Pollutant; Isotherm