Preparation and study of the structure of temperature sensitive polymer nanosorbent and its efficiency in diazinon removal

In this study a graphene oxide nanoparticles were synthesized based on the temperature-sensitive absorbent to selectively absorb diazinon from aqueous solutions. Infrared spectroscopy (FTIR), morphology (SEM) and thermal balance analysis (TGA) techniques were used to detect nanosorbent functional groups. Using these techniques, it was observed that the amine functional group was formed on the surface of the nanosorbent.To find the optimal removal conditions, the effect of effective parameters such as pH, temperature, adsorbent amount, initial analyte concentration and contact time were tested. The concentration of residual diazinon in aqueous solution was measured by Uv-Vis spectrophotometry. The synthesized nanosorbent can be used 7 times repeatedly to extract diazinon. Also, studies on absorption isotherms have shown that diazinon uptake follows the Langmuir equation. The application of synthesized nanosorbents in real samples indicates the high efficiency of this adsorbent in the selective removal and extraction of diazinon from aqueous environment.