Adsorption of the anionic dye (Diamond Fast Brown KE) from textile wastewater onto chitosan/montmorillonite nanocomposites

Abstract

A NOVEL nanocomposite chitosan/montmorillonite has been prepared by using two different weight ratios of nano-montmorillonite (Chs1 and Chs2). The structure of the prepared adsorbents has been characterized by Fourier transform infrared (FT-IR) spectroscopy, and transmission electron microscopy (TEM). The adsorption kinetics and isotherm behaviors of Diamond Fast Brown KE (DFB) dye molecules onto prepared chitosan nanocomposites had been studied and compared using pseudo-first, pseudo-second, and Langmuir, Freundlich, Dubinin _ Radushkevich models, respectively. The maximum adsorption capacities of DFB according to Langmuir isotherm model were 403.23 and 375.94 mg g-1 for Chs1 and Chs2, respectively. Moreover, our results indicate that the adsorption mechanism can be explained by the formation of the hydrogen bond. Based on the obtained results, Chs1 and Chs2 can be successfully applied for DFB dye removal from textile wastewater.

Chitosan based polyelectrolyte complexes development for anionic and cationic dyes adsorption

“…Chitosan (CS) a derivative of natural and abundant polymer chitin, was found to have a high impact in adsorption of anionic dyes [15]as well as in many applications [16][17][18]. Chitosan efficiency for the removal of dyes in aqueous solutions have been reported [19,20] whether by grafting with a polymer containing useful functional groups [21,22] or by blending with functional polymers [23,24].Many attempts have been employed to extend the efficiency of chitosan to adsorb the cationic dyes through composite preparation [6] and working in the frame of low-cost modification is still of great interest.…”

low-cost Bio-Adsorbent based on Amorphous Carbon Thin Film/chitosan composite for removal of Methylene Blue Dye: Kinetic and Isotherm

“…Environmental pollution caused by industrial effluents such as dyes has a great concern in the last decades [1]. Dyes are one of the most significant and serious sources of ecological pollution [2]. Toxic dyes are kept for a long time in water bodies; thus, these dyes can cause cancer, dermatological diseases and eventually affect human health [3,4].…”