Adsorption Isotherms for Removal of Heavy Metal Ions (Copper and Nickel) from Aqueous Solutions in Single and Binary Adsorption Processes

Authors : Burak TEKİN, Unsal AÇIKEL

Pages : 495-509

Doi:10.35378/gujs.1066137

View : 214 | Download : 829

Publication Date : 2023-06-01

Article Type : Research Paper

Abstract :This study deals with the removal of single and binary heavy metals, which cause great problems in terms of the environment and human health, through very low cost, economical and easily obtainable materials. The purpose of this study is to investigate the single- and binary uptake of Copper insert ignore into journalissuearticles values(II); and Nickel insert ignore into journalissuearticles values(II); ions onto the Sepiolite in the terms of a thermodynamic perspective. For mono-component systems, the initial effluent concentration, mixing speed and temperature have been studied as a function of time to determine the conditions where the adsorbents show a great deal of affinity towards the Cu insert ignore into journalissuearticles values(II); and Ni insert ignore into journalissuearticles values(II); ions in aqueous solutions. Before the metal adsorption experiments, the Physical properties of Sepiolite were identified via Brunauer–Emmett–Teller insert ignore into journalissuearticles values(BET); analysis. The single metal ion uptake studies were performed at 20, 25, 30, and 35 °C. At equilibrium, the sorption data were individually shown to correlate well with the non-competitive Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich isotherms. Among the applied isotherm models, the one-component sorption values do fit the Langmuir isotherm best. The simultaneous and competitive uptake of Cu insert ignore into journalissuearticles values(II); and Ni insert ignore into journalissuearticles values(II); was assessed by the extended Langmuir and Freundlich isotherms. Both adsorption equations complied with the two-component sorption data perfectly. Single- and binary-sorption results unclose that the effect of Sepiolite to Cu insert ignore into journalissuearticles values(II); is greater than that of Sepiolite to Ni insert ignore into journalissuearticles values(II);.
Keywords : Individual and simultaneous adsorption, Cu II, Ni II, Sepiolite, Mono and two component adsorption