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The concentrations of Cr, Mn, Fe, Co, Ni, Cu, Zn, and Pb in the main geochemi-cal phases of the sediment (exchangeable, bound to organic matter, bound to Fe-Mn oxides, and residual) were studied in the bottom sediments of the Guama river and the drainage channels (Tamandare, Quintino, Reduto, and Una) of Belem, Para. The concentrations of metals in the bottom sediments of the Guama river showed to be associated mainly to residual phase, whereas in the channels they are linked to Fe-Mn oxides and residual phase. Generally, in the analized sediments, the groups of metals Fe, Zn, Pb are showing association with the Fe-Mn oxides phase, and Cu, Cr, Mn, Co, Ni with residual phase.

GEOQUÍMICA DE METAIS PESADOS EM SEDIMENTOS DO RIO GUAMÁ Ε DOS PRINCIPAIS CANAIS DE DRENAGEM DE BELÉM, PARÁ, BRASIL