Kinetic Studies of Colloidal Metal Complex Species Relevant to Natural Waters
作者:
CooperH. Langford,
MarkK. S. Mak,
期刊:
Comments on Inorganic Chemistry
(Taylor Available online 1983)
卷期:
Volume 2,
issue 3-4
页码: 127-143
ISSN:0260-3594
年代: 1983
DOI:10.1080/02603598308078113
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The dissociation reactions of colloidal complexes of Fe(III), Al(III), and Cu(II) formed by binding of the metals to naturally occurring organic ligands and by their inclusion in hydrous oxide colloids are studied by treatment with an excess of a ligand suitable for sensitive spectrophotometric detection under solution conditions favorable to formation of the complex with the color former. A range of rates varying with metal to ligand ratio are found which emphasize the importance of the extension to kinetics of the mixture polyelectrolyte approach which has gained acceptance in discussion of the equilibrium properties of similar complexes. Results do show interpretable relationships to the kinetic behavior of the better studied mononuclear chelate species and some aspects point to a role for mass transport. The ground is prepared for inorganic kineticists to enter this problem area which probably encompasses the subject of bioavailability of metal ion nutrients and toxicants.
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