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ADSORPTION OF CU2+, CD2+, PB2+ AND ZN2+ IN LANDFILL RESIDUE The high toxicity and the cumulative character of heavy metals have been reasons for great world preoccupation, providing the significant increase of works for development of technologies that potentially might be able to remove those dangerous substances from the environment. With the aim of studying the capacity of removal of heavy metals in leachate of recently collected urban solid residue (RSU-Fresh) by the urban solid residue and by residue of civil construction (RCC), there were performed several experiments of adsorption of metals. 15 years old urban solid residues (RSU-Old) were used as well as 8 years old residues (RSU-Mature) of dump. The results enabled to conclude that the maxim adsorption capacity for RSU-Old presented the sequence Zn> Pb>Cu>Cd, already for RSU-Mature the sequence was Zn>Cu>Pb>Cd. The RSU-Old residue presented larger capacity of retention of the metals of the leachate of landfill.

Adsorção dos Íons Cu2+, Cd2+, Pb2+ e Zn2+ em Resíduo Sólido Urbano