Selective fractionation was applied to partition of heavy metals in river sediment of the rivers Nhue and Tolich Hanoi’s outskirts. The observed results showed a considerable difference of the proportion of various fractions of studied heavy metals. The residual fraction of Cu, Pb, Zn, Cd, Cr, and Ni stayed the highest portions. The portions/percentages of Cu, Pb, Zn, Cd as carbonate fractions were comparatively higher than those as Fe-Mn oxide fractions and organic fractions.
