Article 2021 · 2 citations

COMPARATIVE STUDY OF THE ADSORPTION OF CATIONIC AND ANIONIC DYES BY ALUMINUM (III) MODIFIED CLAY

Gunes, Kubra, Curses, Ahmet, Sabin, Elif, Barin, Tahsin Barkin, Acikyildiz, Metin

Abstract

Dye removal of industrial and domestic effluents is one of the critical environmental operations, and among many technologies applied in this context, adsorption is known as a process with high potential for removing dyes from wastewater. Although layered clays with a high negative surface charge density are extremely suitable for removing cationic dyes from aqueous solution, they are not effective in the adsorption of anionic dyes in their original form. This study aimed to use AI' ions, which are widely used in industrial scale as settling or decantation agents in colloidal dispersions, as modifiers in surface modification of bentonite clay to make them suitable for adsorption of anionic dyes. In this study, bentonite clay was chosen as an adsorbent and it was modified in the aqueous solution of A1C13. In addition, cationic dye, methylene blue (MB), and anionic dye, Remazol red RB, were selected as representative dyes, and the influences of variables such as dye concentration, adsorption time and pH on adsorption were investigated. In the case of anionic dye, the adsorption efficiency of bentonite clay modified with Al(III) increased, whereas the cationic dye adsorption efficiency decreased, indicating that the modification is quite effective.

Keywords

Dye adsorption Methylene blue Remazol Red RB Surface modification Aluminum ions AQUEOUS-SOLUTIONS METHYLENE-BLUE REACTIVE DYES WASTE-WATER REMOVAL COAGULATION ACID BENTONITE MECHANISM OZONATION

WoS Categories

Environmental Sciences

Sustainable Development Goals

Clean Water and Sanitation

Citation

Journal: FRESENIUS ENVIRONMENTAL BULLETIN
Year: 2021
Volume: 30
Issue: 12
Pages: 13264-13273
ISSN: 1018-4619
eISSN: 1610-2304
WoS UID: WOS:000728493300065