Open AccessINFLUENCE OF SEDIMENT HUMIC SUBSTANCES ON THE BIOAVAILABILITY OF METALS IN THE AQUATIC SYSTEM
Author(s) -
Wander Gustavo Botero,
Shenia de Oliveira Souza,
Oséas Silva Santos,
Luciana Camargo de Oliveira,
Cristine Bastos do Amarante
Publication year - 2014
Publication title -
química nova
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.214
H-Index - 73
eISSN - 1678-7064
pISSN - 0100-4042
DOI - 10.5935/0100-4042.20140164
Subject(s) - bioavailability , sediment , environmental chemistry , heavy metals , aquatic ecosystem , aquatic environment , chemistry , environmental science , geology , ecology , pharmacology , biology , geomorphology
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+