A Promising HKUST‐1@SiO2 Composite for the Effective Adsorption of Chlorpyriphos from Aqueous Medium.

This study focuses on the preparation of HKUST‐1@SiO2 composite and its application as an adsorbent for the removal of chlorpyriphos from water environment. For studying the physical properties, synthesized HKUST‐1@SiO2 was characterized using FTIR, XRD, BET, FE‐SEM and EDS. Characterization results indicated that the interaction of HKUST‐1 with SiO2 resulted in improvement of various physicochemical properties. The integration of HKUST‐1 and SiO2 resulted in improved adsorption of chlorpyrifos, where maximum 85 % removal was obtained at 30 °C. The adsorption data was best fitted into Langmuir isotherms, and it was in well accordance with pseudo second order kinetic model. High adsorption efficiency of the composite is related to its high pore volume which results in high number of adsorption sites on silica surface for the attachment of various functional groups present in chlorpyriphos. [ABSTRACT FROM AUTHOR]