|
Abstract
|
Fe3O4egelatin was synthesized via a controlled coeprecipitation method to obtain uniform and high efficient nanocomposite for direct yellow 12 (DY12) removal. The effect of dose of adsorbent, pH, contact time and initial dye concentration on the removal of DY12 was examined. The adsorbent morphology and chemical composition were evaluated using FEeSEM, VSM, FTeIR, XRD and BET. The analyses for characterization indicated that Fe3O4egelatin was successfully obtained with crystallite size and average particle diameter about 82 nm and 81 nm, respectively. Langmuir, Freundlich, Temkin and Elovich isotherm models were checked by adsorption equilibrium data and Langmuir model indicated the best consistency with the experimental results and the maximum adsorption capacity was 1250 mg g1. In addition, kinetic studies were investigated using pseudoefirsteorder, pseudoesecondeorder, Elovich and the intraeparticle diffusion models. It was revealed that the adsorption behavior of DY12 on Fe3O4 egelatin was closer demonstrated by the pseudoesecondeorder kinetic model. The equation of Weber and Morris and Boyd plot were also studied to evaluate the adsorption mechanism. According to the results, Fe3O4egelatin nanoadsorbent has high ability to remove DY12 from aqueous solution.
|