Use of Porous no Metallic Minerals to Remove Heavy Metals, Precious Metals and Rare Earths, by Cationic Exchange

Juan Hernandez, E. Omar Serrano-Mejia, Eleazar Salinas, Eduardo Cerecedo, Ma. Isabel Reyes, Ma. Pilar Gutierrez and Ventura Rodriguez

A chapter in Trace Metals in the Environment - New Approaches and Recent Advances from IntechOpen

Abstract: This chapter is related with the preliminary study of some non-metallic minerals to evaluate their cationic exchange capacity, to remove heavy and precious metals, as well as rare earths elements. The minerals and materials used to execute the ion metals removal were bentonite, phosphorite, and diatomite. The chapter shows the physicochemical behavior of all these minerals, which were used to remove the mentioned elements from solutions coming from ore leaching. It was found that in all cases, the removal of heavy and precious metals, as well as rare earths elements reached over 90%. Although, there were minimal differences in efficiency for all minerals used (bentonite, phosphorite, and diatomite), it could be pointed that the phosphorite has the best results going from 99.43% of removal of Gd, to 99.95-100% for the case of Ce, Nd, La, Yb, Eu, Er, Sm, Tb, Ge, Pd, Pt, and Au.

Keywords: metals removal; cationic exchange; non-metallic minerals; bentonite; phosphorite; diatomite (search for similar items in EconPapers)
JEL-codes: Q55 (search for similar items in EconPapers)
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Persistent link: https://EconPapers.repec.org/RePEc:ito:pchaps:196916

DOI: 10.5772/intechopen.88742

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