Adsorption of reactive black 5 dye onto two kinds of poly (vinyl imidazole)‎ in aqueous solutions

الملخص EN

Removal of a Reactive Black 5 dye, from an aqueous solution was studied by adsorption onto two adsorbent: poly (vinyl imidazole) synthesized by using free radical polymerization and quaternized partially by 1-bromo hixa dekan (p-VImC16).

Also cross linked poly (vinyl imidazole) (p-VIm hydrogel) was synthesized by using free radical polymerization.

The effects of pH, the initial Black 5 concentrations, and temperature in the adsorption process of Black 5 onto polymers were studied and from the obtained data ; the isotherm, kinetic and thermodynamic parameters of adsorption were calculated.

Adsorption equilibrium was studied by Langmuir and Freundlich isotherm models.

Kinetic evaluations were performed by Lagergren-first-order, pseudo-second-order and intraparticular diffusion kinetic models changes of enthalpy, free energy and entropy and activation energy of the adsorption process were also calculated by using kinetic parameters.