Glyphosate adsorption onto porous clay heterostructure (PCH): kinetic and thermodynamic studies

Abstract The synthesis of PCH from natural bentonite produces a porous heterostructure material effective for the adsorption glyphosate water. process takes place through an interaction between silanol group montmorillonite and/or adsorbent with functional groups glyphosate. isotherms, recorded all studied samples, have been established to be Langmuir type. kinetic herbicide on was best described by pseudo-second-order model. With increase in temperature 25 50 °C, sorption capacities materials towards increased. found endothermic and spontaneous nature, as indicated positive values ΔH negative ΔG. According results obtained, more basic environment. maximum amount adsorbed is almost doubled 13.5 mg/g clay 27.5 PCH. Graphic abstract