Study on behavior of alkalescent fiber FFA-1 adsorbing glyphosate from production wastewater of glyphosate

The results of thermodynamics properties researched previously show that the isothermal line of glyphosate adsorption on fiber FFA-1 meets with Freundlich equation, and of glycine is suit to Langmuir equation. The thermodynamic values of ΔHθ, ΔGθ, ΔSθ obtained provide the basic data for large scale recycling effective components from the wastewater of manufacturing glyphosate with FFA-1 fiber. Based on thermodynamics, kinetics of adsorption glyphosate on alkalescent fiber FFA-1 was studied by the static adsorption experiments in the range of 303.15–318.15 K. Some models, such as kinetics equations of pseudo first-order and pseudo second-order, as well as Elovich model and the diffusion model in particle, were used for investigating the adsorbing process. The results obtained show that the process of adsorption glyphosate on alkalescent fiber FFA-1 was found to be satisfied with kinetic equation of pseudo second-order. The exchange activation energies were calculated to be 30.964 kJ mol−1 using the equation of Arrhenius.