The study of adsorption mechanism of mixed pesticides prometryne-acetochlor in the soil–water system

• Thermodynamics and adsorption isotherms of mixed pesticides prometryne-acetochlor (PA) on soil were studied.
• The adsorption characteristics between PA and soil are hydrogen bonds.
• Prometryne and acetochlor entered interlayer clay minerals by IR and XRD analysis.

This article reported adsorption mechanism of mixed pesticides Prometryne-Acetochlor (PA) in soil. Thermodynamics and adsorption isotherms were used to preliminarily evaluate adsorption force, and IR and XRD were used to characterize adsorption characteristics between Prometryne/Acetochlor (PA) and soil, The result shows that adsorption isotherms is F-type, adsorptive heat are 9.57 kJ/mol and −93.83 kJ/mol of prometryne and acetochlor respectively. Hydrogen bonds also had been confirmed by IR and XRD analysis. The results can provide a theoretical support to the use of mixed pesticides agents.