Next Article in Journal
Multibody Dynamic Stress Simulation of Rigid-Flexible Shovel Crawler Shoes
Previous Article in Journal
Modeling the Effect of Composition and Temperature on the Conductivity of Synthetic Copper Electrorefining Electrolyte
Article Menu

Export Article

Open AccessArticle
Minerals 2016, 6(3), 60; https://doi.org/10.3390/min6030060

Kinetics of Iron Leaching from Kaolinitic Clay, Using Phosphoric Acid

1
Laboratorio de Tecnología de Cerámicos, Universidad Autónoma del Estado de Hidalgo, Área Académica de Ciencias de la Tierra y Materiales, Carretera Pachuca—Tulancingo, Km 4.5 s/n, Mineral de la Reforma, Hidalgo C.P. 42184, Mexico
2
Consejo Nacional de Ciencia y Tecnología (CONACyT)—Universidad Autónoma del Estado de Hidalgo, Área Académica de Ciencias de la Tierra y Materiales, Carretera Pachuca—Tulancingo, Km 4.5 s/n, Mineral de la Reforma, Hidalgo C.P. 42184, Mexico
*
Author to whom correspondence should be addressed.
Academic Editor: William Skinner
Received: 3 May 2016 / Revised: 1 June 2016 / Accepted: 15 June 2016 / Published: 24 June 2016
Full-Text   |   PDF [1411 KB, uploaded 24 June 2016]   |  

Abstract

Kaolin is important because it has many applications in the paper, paint-coating, functional filler, extender and pigment industries. This material needs to be bleached by iron leaching to be useful for these applications because this element can be the principal cause of its undesirable coloration. In this work, the kinetics of leaching of iron contained in kaolin clays from the community of Agua Blanca Iturbide, Hidalgo, Mexico, was studied. The leaching experiments were carried out using phosphoric acid as the reagent of leaching for the iron dissolution process. Temperature, acid concentration, and particle size were investigated to determine the most important kinetics parameters during iron leaching. It was determined that the rate of iron dissolution increases with increasing of phosphoric acid concentration, the temperature, and decreased particle size of clay. Data obtained showed that iron dissolution from kaolin clay is due to the diffusion of iron through the product layer. The results revealed that the activation energy of the process was 10.18 kJ·mol−1. View Full-Text
Keywords: iron; leaching; kaolinitic clay; kinetics; phosphoric acid iron; leaching; kaolinitic clay; kinetics; phosphoric acid
Figures

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Hernández-Hernández, R.A.; Legorreta-García, F.; Hernández-Cruz, L.E.; Chavez-Urbiola, E.A.; Salinas-Rodríguez, E. Kinetics of Iron Leaching from Kaolinitic Clay, Using Phosphoric Acid. Minerals 2016, 6, 60.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Minerals EISSN 2075-163X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top