Fig. 9From: Removal and extraction efficiency of Quaternary ammonium herbicides paraquat (PQ) from aqueous solution by ketoenol–pyrazole receptor functionalized silica hybrid adsorbent (SiNPz)A plot of ln D vs. 1/T for the calculations of thermodynamic parameters for the adsorption of paraquat by SiNPz (experimental conditions: 50 mL sample volume, 50 mg SiNPz, and concentration 20.0 mg L−1)Back to article page