INFLUENCE OF SEDIMENT HUMIC SUBSTANCES ON THE BIOAVAILABILITY OF METALS IN THE AQUATIC SYSTEM.

作者：Botero Wander Gustavo^*; Souza Shenia de Oliveira; Santos Oseas Silva; de Oliveira Luciana Camargo; do Amarante Cristine Bastos

来源：Quimica Nova, 2014, 37(6): 943-949.

DOI：10.5935/0100-4042.20140164

• humic substances
• sediment
• Niquim River

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.

• 出版日期2014