Adsorption-desorption and leaching potential of glyphosate and aminomethylphosphonic acid in acidic Malaysian soil amended with cow dung and rice husk ash

摘要: This study investigates adsorption-desorption and the leaching potential of glyphosate aminomethylphosphonic acid (AMPA) in control amended—addition cow dung or rice husk ash—acidic Malaysian soil with high oxide mineral content. The addition ash increased adsorptive removal AMPA. isotherm data AMPA best fitted Freundlich model. constant Kf for was (544.873 mg g−1) followed by (482.451 mg g−1) then (418.539 mg g−1). However, AMPA, (166.636 mg g−1) (137.570 mg g−1) (48.446 mg g−1). 1/n values both adsorptions were < 1 indicating their strong affinity adsorbents. Desorption occurred only soil. compounds not detected soils added ash. mobility. ground water ubiquity scores amended < 2.8. indicated is a transitional herbicide; therefore, its low, despite Addition these wastes decreased mobility could be beneficial increasing adsorption enhancing degradation compounds.