Author/Authors

Guerra، نويسنده , , Denis L. and Oliveira، نويسنده , , Silze P. and Silva، نويسنده , , Emiliano M. and Batista، نويسنده , , Adriano C.، نويسنده ,

DocumentNumber

3268194

Title Of Article

Adsorption of uranyl on beryl and tourmaline; kinetics and thermodynamic investigation

شماره ركورد

10335

Latin Abstract

In this study, the original tourmaline and beryl mineral samples have been collected from a Brazilian pegmatite. The objective of this study was to examine the adsorption behavior of uranyl from aqueous solution on Brazilian cyclosilicate samples. The cyclosilicate samples were characterized by elemental analysis, X-ray diffraction, and nitrogen adsorption–desorption. The ability of these minerals to remove the U(VI) from aqueous solution was followed by a series of adsorption isotherms, using a batchwise process. The adsorption maximum was determined to be 2.95 and 2.60 × 10− 4mol g− 1 for beryl and tourmaline mineral samples, respectively. The energetic effects caused by radionuclide cation adsorption were determined through calorimetric titrations. Thermodynamics indicated the existence of favorable conditions for such U(VI)–OH interactions.

From Page

25

NaturalLanguageKeyword

Kinetics , Thermodynamics , Removal of U(VI) , Calorimetry , Environmental protection

JournalTitle

Studia Iranica

To Page

31

To Page

31