Removal of Bromocresol Green by Using of Iron Oxide/Carbon Nanocomposite

Bromocresol green is a dye of the triphenylmethane family which present as pollutant in textile industry. In this work, removal of bromocresol green as a water pollutant was performed by using of carbon/iron oxide magnetic nanocomposite. Removal efficiency of sorption process was obtained by using of UV-Vis spectroscopy. At first, the effect of important parameters on adsorption process such as pH, dose of sorbent and contact time was explored. The maximum removal was obtained at pH 5 during 2 minutes. Then, proposed nano sorbent was used for removal of bromocresol green in real samples. Also, equilibrium isotherm studies were examined by application of different conventional models such as Langmuir, Freundlich, Temkin and DR models to explain the experimental data. Fast kinetics of sorption process is one of the main advantages of proposed nano sorbent. Also, as a result, the best fitted model was DR which indicated physical absorption process. Also, Qm theoretical maximum adsorption capacity was obtained as 159 mg g-1 which is better than the corresponding values of other previously reported sorbent. As a result, iron oxide/carbon nanocomposite was used successfully for removal of bromocresol green.