Adsorption of Cu2+ ions from aqueous solutions is an increasingly important problem. Nano-titanate ETS-2 (Engelhard Titanosilicate-2) was studied for Cu2+ removal from aqueous solutions through the batch technique at room temperature. Structural and chemical properties of both ETS-2 sorbent and aqueous solution were studied by different characterization tests such as Thermogravimetric Analysis, Energy Dispersive X-ray spectroscopy, X-ray Photoelectron Spectroscopy and Inductively Coupled Plasma measuremen. Copper adsorption capacity was found to increase upon raising the contact time or the pH of the solution. The maximum uptake of Cu2+ (99.9%) by ETS-2 occurred at pH of 6.7 and 30 min of contact time. The Cu2+ removal capacity of ETS-2 was found to be 53.58 mg/g at pH = 5.16, which improved to 54.02 mg/g, when rising the contact time to 90 min. Chemical properties of ETS-2 indicated that ETS-2 surface possessed sodium exchange sites making it a favourable sorbent for metal exchange.
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