Effects of Several Salts on In Vitro Adsorption of Paraquat by Cation Exchange Resins and Activated Carbons

Abstract

The effects of several salts on the in vitro adsorption of paraquat by cation exchange resins and activated carbons were studied in the disintegration test fluids (JP XII) at 37°C. Under the condition of no addition of salts, cation exchange resins showed much greater adsorption capacities for paraquat than activated carbons. However, the adsorbing capacities of cation exchange resins were extremely decreased in the presence of sodium chloride and, saline purgatives such as magnesium sulfate and sodium sulfate, whereas the adsorption of paraquat on activated carbons tended to be enhanced by the addition of salts to the media.