Fast and Effective Route for Removing Methylene Blue from Aqueous Solution by Using Red Mud-Activated Graphite Composites

Abstract

In this work, the mixture of red mud slurry and inorganic salt ((NH4)2SO4) has been used as an electrolyte for electrochemical activation of graphite. The red mud-activated graphite composite was then used as an adsorbent for removing methylene blue from aqueous solution by the batch method. The effect of pH, contact time, adsorbent dosage, and the initial concentration of methylene blue was investigated. The optimal condition was found at pH 6, contact time 120 min, and amount of adsorbent 1 mg/L. The maximum adsorption capacity was found to be 89.28 mg/g based on the Langmuir isotherm equation, suggesting that the red mud-activated graphite composite is a very potential adsorbent for removing methylene blue and is also used in other coloured wastewater treatments.

Preparation of styrene-based imprinted polymer for the adsorption of hazardous bromocresol green dye: Equilibrium, kinetics and thermodynamics study

“…The huge production and massive utilization of synthetic dyes have resulted in substantial environmental pollution, thus, constituting a serious menace to the public. Dyes are primarily found in effluents released from rubber, plastics, dye processing, cosmetics, textile and leather industries (Nidheesh et al, 2012;Linh et al, 2019). The three primary groups of dyes are the anionic (which comprise acid, reactive, and direct dyes), cationic (which are majorly basic dyes), and the n o n i o n i c ( e .…”

Carboxylic Acid-Terminated Carbon Nanoflakes for Selective Adsorption of Water-Soluble Cationic Dyes

“…For adsorption purposes, presently, nanomaterials have gained much attention. Specifically, the carbon-based materials/nanomaterials such as activated charcoal (AC)/activated carbon, − coal, fly ash, graphene-based materials, − carbon dots, , carbon nanotubes, , carbon nano-onions, carbon nanoflakes (CNFs), , and hydrogels , have been developed as adsorbents for the adsorption of water-soluble dyes. Among these, CNFs have recently attracted much attention for their versatile applications such as supercapacitors, lithium storage, and so forth. − However, the use of CNFs as promising adsorbents is still unexplored.…”