Indian Journal of Advances in Chemical Science Volume: 8, Issue :2 , April 2020

ISSN No.: 2320-0898 (Print); 2320-0928 (Electronic)

DOI: 10.22607/IJACS.2020.802002  

Research Article

Removal of Cadmium(II) Using Red Powdered Marble Waste from Aqueous Matrix
 

P. K. Baroliya*, Ankita Shrimali, Varsha Dayma, Jaishri Chopra

ABSTRACT

This report describes use of Red Powdered Marble Waste (RPMW) for the removal of Cd²⁺ from aqueous matrix. RPMW is considered as inexpensive and widespread solid waste which is directly exposed to environment. The removal of Cd²⁺ ions from aqueous medium is achieved by optimizing various adsorption parameters along with the effect of temperature, pH, stirring time, and Cd²⁺ ion concentration. Kinetic studies were carried out using Morris-Weber equation. Langmuir and Freundlich adsorption isotherms are successfully employed for the study of adsorption of Cd²⁺ ions onto RPMW. Thermodynamic parameters specifically Gibbs free energy change (ΔG), enthalpy (ΔH), and entropy (ΔS) have also been calculated and their values −4.537 KJ/mol, 68.53 KJ/mole, and 16.8621 J/mole, respectively. The highest removal of Cd²⁺ ion onto RPMW was found to be 340.59 mg/gm. These findings suggested that the adsorption process of Cd²⁺  ion onto RPMW was endothermic and spontaneous in nature.

 

Key words: Red marble, Cadmium, Adsorption, Waste water.

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