Use of Si-Phytoliths in depollution of mining areas in the Cerrado-Caatinga region, MG, Brazil - Fernandes-Horn, Heloiza Márcia; Sampaio, Regynaldo Arruda; Horn, Adolf Heinrich; Oliveira, Ely Sandra Alves de; Lepsch, Igo Fernando; Bilal, Essaïd (International Journal of Geomate, 2016)