Iron Removal from Kaolin Waste Dumps by Chemical (Oxalic and Citric Acids) and Biological (Bacillus Strain) Leaching

Autor: Yolanda Sánchez-Palencia, David Bolonio, Marcelo F. Ortega, María-Jesús García-Martínez, José Eugenio Ortiz, Fernando Rayo, Lucía Arregui, Susana Serrano, Juan F. Llamas, Laureano Canoira
Rok vydání: 2022
Předmět:
Zdroj: Clays and Clay Minerals. 70:386-404
ISSN: 1552-8367
0009-8604
Popis: Kaolin waste dumps contain a huge volume of material that cannot be commercialized due to the presence of variable amounts of iron minerals, which impart a yellowish color to the kaolin. Elimination of iron from kaolin using either a chemical or a biological method was the aim of this study. The chemical leaching of iron from kaolin was carried out using response surface methodology to optimize the reaction conditions. Time was found to be the most influential variable, although oxalic acid must be present to leach 32% of the iron. Biological leaching was also assayed for 14 days using a Bacillus strain. The results of bacterial leaching of iron from kaolin showed
Databáze: OpenAIRE
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