A facile preparation of dicyclohexano-18-crown-6 ether impregnated titanate nanotubes for strontium removal from acidic solution

Abstract

Abstract In the present work, dicyclohexano-18-crown-6 impregnated titanate nanotubes composite (TNTs@DCH18C6) was prepared as an adsorbent for the selective separation of Sr2+ from acidic medium solution. Samples were specified with TEM, FTIR, and TGA. Effects of nitric acid concentration, adsorbent dosage, ionic strength, initial Sr2+ concentration and contact time were investigated with batch experiments. The results indicated that the adsorption was faster in the first 5\u202fmin and equilibrium was achieved after 180\u202fmin in the media of 6\u202fmol\u202fL−1 HNO3. The adsorption data at equilibrium state were successfully described by the Freundlich isotherm. The kinetics adsorption was well described by the pseudo-second-order model. Results demonstrated that the as-synthesized hybrid composite is highly stable in harsh acidic medium, indicating its promise as an effective adsorbent for the removal of Sr2+ from acidic solution.