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FULVIC ACID. II. INTERACTION WITH METAL IONS
Author(s) -
MacCARTHY PATRICK,
O'CINNEIDE S.
Publication year - 1974
Publication title -
journal of soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.244
H-Index - 111
eISSN - 1365-2389
pISSN - 0022-4588
DOI - 10.1111/j.1365-2389.1974.tb01138.x
Subject(s) - chemistry , cationic polymerization , flocculation , metal ions in aqueous solution , fulvic acid , cobalt , metal , inorganic chemistry , inert , ion , transition metal , chelation , humic acid , polymer chemistry , organic chemistry , catalysis , fertilizer
Summary Evidence is presented, based on sequestration, chemical behaviour, ultra‐violet and infra‐red spectroscopy, to indicate the formation between the non‐cationic fraction of fulvic acid and a variety of transition metal ions, of stable soluble complexes and also of insoluble complexes over the complete pH range. The soluble complexes formed under alkaline conditions are negatively charged. The fulvic material is very effective in competing with other ligands for the metal ions. Mechanisms for the flocculation of the soil organic matter in the presence of heavy metal ions are discussed. The formation of inert complexes between cobalt and the fulvic material is also demonstrated and its implications to the study of metallo‐organic complexes are discussed.