Study of the Kinetics Adsorption of Organic Pollutants on Modified Cellulosic Polymer Using Ultraviolet-Visible Spectroscopy

Abstract

We report a study on the formation of the complex acrylamidomethylated-β-cyclodextrin, then on the grafting on cellulosic polymer. The grafting is initiated by ceric ions Ce(IV) and confirmed by infrared spectroscopy analysis (FTIR). Scanning electron microscopy (SEM) analysis was carried out to evaluate properties of structure and surface of grafted polymers. The experiments of the study of adsorption of balance of phenol and hydroquinone and a reactive dye, acid dyes, and cationic dyes using ultraviolet-visible microscopy were made in aqueous solutions for 24 hours at different pH. Our results indicate formation of a permanent chemical bond betweenβ-cyclodextrin and polymers material. The cellulosic polymers can effectively be modified without significant change in the structural properties. Then, the results of organic pollutants adsorption in aqueous medium show the aptitude of the polymer modified to fix the phenol derivatives and synthetics dyes and used in the processing industrial liquid waste. The differences in adsorption capacities may be due to the effect of dye structure. The negative value of free energy change indicated the spontaneous nature of adsorption.

Polyelectrolytes Ability in Reducing Atrazine Concentration in Water: Surface Effects

“…The behavior observed in Figure 2 is not comparable to a conventional isotherm [ 14 ]. However, when dealing with polymer adsorption the conventional type of isotherm might not be valid [ 12 , 13 ]. According to Ghemati and Aliouche [ 12 ], a steep increase in adsorption could be caused by a high-energy barrier in the adsorption process that must be overcome before additional adsorption can occur at new sites.…”

“…However, when dealing with polymer adsorption the conventional type of isotherm might not be valid [ 12 , 13 ]. According to Ghemati and Aliouche [ 12 ], a steep increase in adsorption could be caused by a high-energy barrier in the adsorption process that must be overcome before additional adsorption can occur at new sites. However, this adsorption only occurs after saturation of the surface with a monolayer of solutes and is not very likely for adsorption of atrazine to happen onto that surface.…”

“…An L-type of isotherm in the Giles classification was expected with an increase in the dosage of the polymer. However, in dealing with polymers especially polyelectrolytes, this conventional type of isotherm might not be valid because of the dependence on electrostatic and nonelectrostatic interactions [ 12 , 13 ]. In order to investigate the mechanism surface-to-volume ratio experiments were carried out.…”