1. APHA, 1995. Standard Methods for the Examination of Water and Wastewater, 19th ed. Washington.
2. Carbon Adsorption Handbook;Cheremisinoff,1980
3. Binary liquid-phase mass transport in mixed-bed ion exchange at low solute concentration;Chowdiah;Industrial and Engineering Chemistry Research,2003
4. De León, A.B.T., 2002. Modificação estrutural de bentonitas nacionais modificadas: Caracterização e estudos de adsorção. PhD. Dissertation, PPGEM/UFRGS, Porto Alegre (in Portuguese).
5. Ammonia leaching process for Escondida copper concentrates;Duyvesteyn;Transactions of the Institution of Mining and Metallurgy, Section C: Mineral Processing and Extractive Metallurgy,1995