Adsorption of Reactive Red 120 from aqueous solutions by cetylpyridinium‐bentonite

Abstract

BACKGROUND: The removal of Reactive Red 120 (RR 120) from aqueous solutions using cetylpyridinium modified Resadiye bentonite (CP-bentonite) prepared by ion exchange was investigated with particular reference to the effects of temperature, pH and ionic strength on adsorption.

Mechanism of adsorption of anionic dye from aqueous solutions onto organobentonite

“…However, the asymmetric SO 2 stretching band is located at 1302 cm −1 in the spectrum of the same sample. Weaker peaks of the functional groups of the dye rather than those of the cationic surfactant peaks indicate substitution of the anionic dye molecules by some cationic surfactant species via mainly electrostatic interactions as well as van der Waals forces [34][35][36]. Fig.…”

Preparation and characterization of “green” hybrid clay-dye nanopigments

“…Rh-B/UB samples (Fig. 2a) display that there are different peaks, which are large and small corresponding to the functional groups of the Rh-B in the range 1250-1650 cm À 1 compared to the raw bentonite [18]. The IR peaks appeared in the ranges of 1647-1467 cm À 1 can be based to the aromatic ring vibrations resulting from the C ¼C skeleton stretching.In addition to these bands, two characteristic peaks are observed for stretching and bending modes involving CH 3 and CH 2 alkyl groups at 2978-2928 cm À 1 and 1467-1340 cm À 1 , respectively [19].…”

“…2b and c). Moreover, the changes in the position of the ring vibrations exhibited the contribution from the π interactions occurring between the O-plane of bentonite silicate layers and Rh-B with aromatic rings lying parallel to the alumina silicate layers and tilting at a definite angle with respect to the clay surface [18].…”

Adsorption of Methyl Orange Dye Using Fe-Mn Composite Powder as Adsorbent

“…At higher pH values the adsorbent surface gets negatively charged due to OH -ions which results in the decrease of MO percentage removal due to electrostatic repulsion. pH 2.0 is chosen throughout this study for analysis of other parameters and also for equilibrium and kinetic studies [14,15,16].…”