Heavy metals in sediment profiles from Sepetiba and Ribeira Bays: A comparative study

摘要: Three sediment cores were sampled at Sepetiba bay and four Ribeira bay, Rio de Janeiro State, Brazil. Sedimentation rates determined applying 210 Pb dating. In the Bay, sedimentation rate increases in direction from sampling point RB1 (0.15 cm y-1 ), inner part of to 0.34 RB4, close its entrance. For two observed: a lower 0.3 , for period before 60's, more recent 0.75 . These findings agree with construction Santa Cecilia impoundment (1955) that brings water Paraiba do Sul Basin into Guandu River, increasing flow original 20 m3 s-1 160 order determine elemental concentrations, aliquot SB1 RB4 taken, totally dissolved analyzed by ICP-MS. The hypothesis Bay could constitute reference database metal concentrations neighboring is valid several elements as K, Ti, Mn, Zn, Ga, Rb, Sr among others, but it isn't other V, Cr Cd. Applying mean concentration, upper contaminated 45 layer, concentration deepest layer normalization iron, double ratio was calculated concluded sediments are, particularly, Cr, may be, leather tanning plant existing this region Cd Zn former Inga Metais.