Adsorptive removal of Cu(II) by fly ash based geopolymer material. (2023)

• Record Type: Journal Article
• Authors: Gupta, Nitish Kumar
• Is Part Of: Materials today. Volume 72(2023)Part 1
• Page Start: 256
• Page End: 259
• Publication Date: 2023
• Subjects: Fly ash -- Rice husk -- Cu(II) -- Kinetics -- Isotherm -- Thermodynamics; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2022.07.264
• Languages: English
• ISSNs: 2214-7853

Abstract

Highlights: Fly ash and rice husk-based geopolymer type hybrid mass is Synthesized. This hybrid mass is a used for removal of copper from aqueous solution. Equilibrium isotherm best described by Langmuir adsorption isotherm with monolayer adsorption capacity of 28.51 mg/g. Kinetics of the reaction follows pseudo second-order kinetic model. Thermodynamic studies revealed the exothermic and spontaneous nature of the adsorption reaction. Abstract: Geopolymer are aluminosilicate inorganic polymer synthesized by polymerization of aluminosilicate with alkaline solutions. These materials possess high surface area hence promising adsorbent. In this paper fly ash and rice husk-based geopolymer type hybrid mass is applied for remediation of Cu ( II ) ions. Various adsorptive parameters for example contact /reaction time, effluent metal ions concentration, dose of hybrid mass, pH and operating temperature are optimized and fixed for getting maximum removal of aqueous Cu ( II ) ions. Equilibrium isotherm and kinetic studies revealed that the isotherm data were best described by Langmuir adsorption isotherm and the rate of adsorption follows the pseudo second-order. Thermodynamic studies carried out by applying Van't Hoff equation, which revealed that the process was exothermic and spontaneous. Results indicate encouraging performance of hybrid mass towards removal of Cu ( II ) ions.