Abstract
This study involves the adsorption of endosulfan, an organo-chlorine pesticide from aqueous solution using synthesized graphene clay matrix (GCM). Graphene was synthesized from Sucrose C12H22O11 at high temperature and pressure and embedded on the surface of clay to avoid liquid solid separation and was activated by 30% Conc. sulphuric acid. GCM was characterized by various instrumentations like Raman spectroscopy, Fourier transform infra – red spectroscopy (FTIR), thermo gravimetric analyzer (TGA), differential thermo analyzer (DTA). The peak range obtained in raman spectroscopy was 1000–1500 Cm−1 at G band and 2500 – 3500 at the 2D band. FTIR was analyzed for infrared spectral bonds of adsorbent and the C=N, C=C, C=O spectrum indicated Graphene. TGA showed the change of structural composition with respect to increase in temperature and DTA gave the heat evolution graph of graphene monomer respectively. The aqueous solution of endosulfan after adsorption was analyzed by batch and column adsorption methods by varying its concentration, contact time, quantity of adsorbent used, etc. and the favorable results were obtained for the removal efficiency of endosulfan from aqueous solution. The analyte solution was characterized by high performance liquid chromatography (HPLC) and the maximum removal efficiency obtained was 98% in batch studies and 94% in column adsorption method. This method of endosulfan removal will be one of the best methods for the degradation of organo-chlorine derivatives by harmless natural method in a cost-effective manner.
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