1. Adsorption characteristic of U(VI) ion onto thermally activated bentonite
- Author
-
Ramazan Donat, Sule Aytas, and M. Yurtlu
- Subjects
Hot Temperature ,Thermodynamic parameter ,Health, Toxicology and Mutagenesis ,thermodynamic property ,Surface area ,Analytical chemistry ,heavy metal removal ,thermogravimetry ,X ray fluorescence ,Thermal treatment ,Water Pollutants ,infrared spectroscopy ,Thermal analysis ,Waste Management and Disposal ,time ,concentration (composition) ,Aqueous solution ,Low-cost adsorbents ,Thermally activated ,pH ,Chemistry ,Contact time ,article ,Temperature ,Spectra analysis ,Hydrogen-Ion Concentration ,Pollution ,Thermogravimetry ,pH effects ,Bentonite ,Thermodynamics ,Uranium ,thermal analysis ,Adsorption isotherm model ,Freundlich ,Uranium compounds ,Environmental Engineering ,Enthalpy ,ultraviolet spectroscopy ,Heat treatment ,Water Purification ,Adsorption ,enthalpy ,Differential thermal analysis ,Adsorption process ,Environmental Chemistry ,controlled study ,Freundlich equation ,Aqueous solutions ,Graphical correlation ,Metal concentrations ,concentration (parameters) ,isotherm ,Dubinin-Radushkevich ,Adsorption characteristic ,adsorption ,chemical analysis ,Effect of pH ,Calcination ,ion ,heat ,aqueous solution ,entropy ,Transuranium elements - Abstract
In this study, the effect of pH, contact time, temperature, and initial metal concentration on U(VI) adsorption on thermally activated bentonite (TAB) was investigated. Graphical correlation of various adsorption isotherm models like, Freundlich, and Dubinin-Radushkevich have been carried out for TAB. Various thermodynamic parameters, such as, Gibb's free energy, entropy and enthalpy of the on-going adsorption process have been calculated. In order to reveal the adsorptive characteristic of bentonite samples, surface area, FT-IR, and DTA-TG spectra analyses were carried out. The results show that TAB samples can be an alternative low cost adsorbent for removing U(VI) ions from aqueous solutions. © 2009 Elsevier B.V. All rights reserved.
- Published
- 2009