TY - JOUR
T1 - The hydrolytic scavenging of metal ions by marine particulate matter
AU - Clegg, Simon L.
AU - Sarmiento, Jorge Louis
N1 - Funding Information:
The authors would like to thank Dr J.W. MURRAY,D r M. WHITFIELDa nd Dr H. ELDERFIELD for helpful discussion and advice. This work was funded by the Office of Naval Research, (contract NOOO 14-86-K-0063).
PY - 1989
Y1 - 1989
N2 - A simple chemical model of hydrolytic scavenging by marine particulate matter is developed, incorporating adsorption of free metal ions and hydrolysis complexes and taking into account competitive complexation by major seawater anions. The model is applied to laboratory adsorption data and successfully predicts the trend in adsorption for a range of metals on different natural particles, but fails where adsorptive behaviour is dominated by oxide or mineral phases. Experimentally determined distribution coefficients and adsorption rate constants for strongly adsorbed metals such as Th, Pu and Sn appear to be consistent with those derived for Th from ocean data, at the same suspended particle concentration. Using Th as a model, the hydrolytic scavenging behaviour of metals (except oxyanions) in the ocean can be estimated from thermodynamic data for hydrolysis and complex formation with the major anions of seawater. An index of scavenging for over fifty metals is presented.
AB - A simple chemical model of hydrolytic scavenging by marine particulate matter is developed, incorporating adsorption of free metal ions and hydrolysis complexes and taking into account competitive complexation by major seawater anions. The model is applied to laboratory adsorption data and successfully predicts the trend in adsorption for a range of metals on different natural particles, but fails where adsorptive behaviour is dominated by oxide or mineral phases. Experimentally determined distribution coefficients and adsorption rate constants for strongly adsorbed metals such as Th, Pu and Sn appear to be consistent with those derived for Th from ocean data, at the same suspended particle concentration. Using Th as a model, the hydrolytic scavenging behaviour of metals (except oxyanions) in the ocean can be estimated from thermodynamic data for hydrolysis and complex formation with the major anions of seawater. An index of scavenging for over fifty metals is presented.
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U2 - 10.1016/0079-6611(89)90023-2
DO - 10.1016/0079-6611(89)90023-2
M3 - Article
AN - SCOPUS:0024920764
SN - 0079-6611
VL - 23
SP - 1
EP - 21
JO - Progress in Oceanography
JF - Progress in Oceanography
IS - 1
ER -