ABSTRACT
Arsenic (As) pollution in water has been considered as a severe public health concern throughout the world. In this study, prepared polyaniline hollow microsphere (PNHM)/Fe3O4 magnetic nanocomposites were applied to the effective removal of toxic As(III) and As(V) from aqueous solutions at different temperatures. Batch adsorption study shows that arsenic adsorption capacity of PNHM/Fe3O4-40 (Fe3O4 content 40%) can be achieved up to 24–61 mg/g at neutral pH. Additionally, adsorption data fitted well with the Freundlich isotherm model for both the arsenic species. However, the present study emphasizes the effect of temperature on the adsorption of arsenic from contaminated water and the analysis of the thermodynamic parameters. Results show that the adsorption of As(III) and As(V) on the surface of PNHM/Fe3O4-40 nanocomposites increase with the increase in temperatures from 293 K to 313 K indicating the endothermic nature of the process.
