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Metal Ion Binding and Exchange with Hydrogen Ions in Acid‐Washed Peat
Author(s) -
Bloom P. R.,
McBride M. B.
Publication year - 1979
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1979.03615995004300040012x
Subject(s) - chemistry , adsorption , inorganic chemistry , metal , carboxylate , ion , metal ions in aqueous solution , divalent , peat , chelation , titration , ion exchange , electron paramagnetic resonance , hydrogen , organic chemistry , ecology , physics , nuclear magnetic resonance , biology
Titration and electron spin resonance (ESR) studies of metal ion adsorption processes on acid peat were used to investigate metal‐proton exchange. Localization of ions at carboxylate sites is suggested but the data indicate that chelation mechanisms or sites of greatly different acid strength need not be involved. The peat is observed to behave very much like synthetic cross‐linked polycarboxylic acids in terms of metal ion adsorption. Most of the divalent ions adsorbed at acid pH appear to maintain a hydration sphere while the strongly immobilized Cu 2+ ion coordinates directly with functional oxygens of the peat.