Enrichment of clay from Vitoria da Conquista (Brazil) for applications in cosmetics - Silva-Valenzuela, Maria das Graças da; Chambi Peralta, Marvin Marco; Sayeg, Isaac Jamil; Carvalho, Flavio Machado de Souza; Wang, Shu Hui; Valenzuela Díaz, Francisco Rolando (Applied Clay Science, 2018)