Abstract
Surface hydrogel polymer i.e. poly-2-hydroxyethyl methacrylate (PHEMA) was used as an adsorbent for the removal of hazardous toxic dye alizarin from a solvent phase of the solution. The whole adsorption phenomenon was well explained and elucidated in the present study. The adsorbent under consideration was synthesized and characterized using various analytical techniques such as SEM and ATR-FTIR. Impacts of various physico-chemical parameters such as contact time, pH and dye concentration were illustrated; the optimized values of the influential parameters was found to be 50min, 8, and 20ppm, respectively by keeping the adsorbent dose constant at 0.5g. The obtained experimental kinetic data was well fitted and in good agreement with pseudo-second order model. Thermodynamic studies revealed the feasibility and endothermic nature of the system. The results of the present study suggest that surface hydrogel polymer i.e. PHEMA can be beneficially used for the rapid removal of hazardous dye alizarin from the solvent phase.
Removal of alizarin from aqueous solutions onto poly-2-hydroxyethyl methacrylate (PHEMA). [Display omitted]
•The surface hydrogel polymer PHEMA was synthesized and characterized using SEM and ATR-FTIR.•PHEMA adsorbent possesses an entangled three-dimensional structured network with many interconnected pores.•PHEMA consist of two groups; one group forms a complex and the other allows the polymers to stretch and shrink reversibly.