Contamination by heavy metals of degraded land by kaolin mining activities
Contamination by heavy metals of degraded land by kaolin mining activities
Silva, A.C. da; Mendonca, E. de S.; Fontes, R.L.F.; Fontes, M.P.L.
Revista de Ciencias Agrarias 37: 31-41
2002
A study was conducted to evaluate the contamination by heavy metals (Fe, Zn and Cd) of a residue disposal area from the cleaning process of kaolin. Landfill material, soil sample used as control and residue (waste) samples were collected and analysed by atomic absorption spectrophotometer for total concentration of metals (single extraction using acid) and fractioned metals (sequential extraction using different reagents).