Influência das substâncias húmicas de sedimentos na biodisponibilidade de metais para o sistema aquático
In rivers, sediments act as sinks for retaining contaminants. This study evaluated the influence of sediment humic substances (HS) on the bioavailability of metals. The levels of metals in sediments and HS indicated that most are complexed with HS. Characterization of HS showed a high degree of humification. The complexation capacity of HS for metals established the affinity order:Pb2+<Cd2+<Co2+<Ni2+<Cu2+<Zn2+<Mn2+<Fe2+. Chemometric analysis demonstrated a correlation between the structural characteristics of HS and complexation capacity of metals.
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| Auteurs principaux: | , , , , |
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| Format: | Digital revista |
| Langue: | Portuguese |
| Publié: |
Sociedade Brasileira de Química
2014
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| Accès en ligne: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422014000600004 |
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