Adsorption of organic matter from industrial phosphoric acid (H3PO4) onto activated bentonite

The Tunisian industrial phosphoric acid (IPA) was obtained from the phosphate rock by the wet process. However, the organic matter (OM) contained in the acid may interact with organic solvents to form stable foams, preventing phase settling, or simply by forming cross layers and organic phases, and...

Full description

Saved in:

Bibliographic Details
Published in:	Arabian journal of chemistry Vol. 10; no. S1; pp. S1073 - S1080
Main Authors:	Khoualdia, Béchir, Loungou, Mouna, Elaloui, Elimame
Format:	Journal Article
Language:	English
Published:	Elsevier B.V 01-02-2017 Elsevier
Subjects:	Adsorption Bentonite Freundlich Langmuir Phosphoric acid Redlich–Peterson Redlich–Peterson Bentonite Phosphoric acid Freundlich Adsorption Langmuir
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	The Tunisian industrial phosphoric acid (IPA) was obtained from the phosphate rock by the wet process. However, the organic matter (OM) contained in the acid may interact with organic solvents to form stable foams, preventing phase settling, or simply by forming cross layers and organic phases, and denaturing part of the solvent. Hence, removal of these organics seems to be an important step for the production of decontaminated phosphoric acid. In the phosphoric acid plant of M'dhilla, the OM can be found as colloidal suspension and soluble forms. The colloidal organics are coagulated and deposited with the gypsum precipitation during the aging of H3PO4, while the soluble part remains behind. The purpose of this work was to study the OM adsorption onto montmorillonite bentonite. Equilibrium data are analyzed by the Langmuir, Freundlich and Redlich–Peterson adsorption isotherm models.
ISSN:	1878-5352 1878-5379
DOI:	10.1016/j.arabjc.2013.01.014