Premium
Adsorption and Desorption of Diquat, Paraquat, Prometone, and 2,4‐D by Charcoal and Exchange Resins
Author(s) -
Weber J. B.,
Ward T. M.,
Weed S. B.
Publication year - 1968
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/sssaj1968.03615995003200020015x
Subject(s) - diquat , paraquat , chemistry , adsorption , desorption , ion exchange , inorganic chemistry , ion exchange resin , charcoal , nuclear chemistry , chromatography , ion , organic chemistry
The adsorption of diquat, paraquat, prometone, and 2,4‐D by charcoal and cation‐ and anion‐exchange resins and their desorption with water and 1 M NaCl solutions has been investigated. Prometone and 2,4‐D were adsorbed by charcoal in much greater amounts than were diquat and paraquat, but all of the compounds were readily desorbed with deionized water following normal Freundlich isotherms. Diquat and paraquat were adsorbed by the cation exchange resins (H and Na forms) and both herbicides were readily desorbed by Na + ions but not with deionized water. Diquat was preferentially adsorbed over paraquat by the cation‐exchange resins and diquat was also more effective in displacing paraquat from the resins. Prometone was adsorbed in small amounts by the cation resin in the Na form and the anion resin in the Cl form and was readily desorbed with deionized water. Prometone was adsorbed by the cation resin in the H form in amounts which were similar to those for diquat and paraquat. None of the prometone adsorbed by the H‐resin was desorbed by equilibrating with water. Prometone desorbed from the H‐resin with 1 M NaCl solutions was identified as hydroxypropazine.