KINETIC STUDY ON ADSORPTION OF COPPER USING GRAPHENE TITANIUM- DIOXIDE NANO COMPOSITE (GTNC)P.L.V.N. SAICHANDRA, G.B. RADHIKA AND S.V. SATYANARAYANA
In this paper batch removal of Copper from aqueous solutions by Graphene Titanium Dioxide Nano-composite (GTNC) was investigated. The batch experiments were conducted to study the adsorption kinetics of copper removal for the concentration of 10 mg/L copper solution. The equilibrium was achieved around 240 min for the above concentration. Batch mode experiments were carried out as a function of adsorbent dosage and contact time. FT-IR spectra of the adsorbent were recorded to explore the number and position of functional groups available for the binding of Cu (II) ion. The removal of copper was dependent on the physicochemical characteristics of the adsorbent, adsorbate concentration and other studied process parameters. Maximum percentage of Copper removal was found to be 78 % at 5 g of adsorbent. SEM, TEM, FTIR and Raman Spectroscopy were done to understand the morphology and functional groups present in GTNC. The applicability of Langmuir and Freundlich isotherms was also tested. The results revealed that the divalent copper is considerably adsorbed on GTNC and it could be an economical method for the removal of divalent copper from aqueous systems.
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