Interaction between humic acids and copper(II) oxinate

✍ Scribed by Masami Fukushima; Mitsuhiko Taga; Hiroshi Nakamura

• Book ID: 102987076
• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 692 KB
• Volume: 289
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(94)80106-1

✦ Synopsis

The solubility of the fungicide copper011 oxinate (CMOX),) linearly increased with the concentration of humic acid in aqueous solution. This phenomenon was attributed to the interaction between Cu(OX), and hydrophobic domains in humic acid, and the Cu(OX), association coefficients with humic acids (&,J were evaluated. The evaluations of the K, values were carried out for hunk acids extracted from peat and marine sediment. For these humic acids, the K,, values increased at pH 6 with decreasing copper(I1) complexing capacity and amount of acidic functional groups. This suggested that the Kda: values can be correlated with the polarity of the humic acids. The interaction between Cu(OX), and humic acid could be ascribed to the hydrophobic-hydrophobic interaction.