In this paper, titanate nanotubes were synthesized with hydrothermal treatment of the commercialTiO2particles (Aldrich,≥99%purity, 325 mesh). The morphology and structures of as-prepared samples wereinvestigated by transmission electron microscopy (TEM), X-ray diffraction (XRD) and N2adsorption/desorption. The samples exhibited a tubular structure and a high surface area of 155.78 m2g-1.Batch experiments showed that the adsorption of tetracycline hydrochloride (labeled as TC) was preferred inweak acid solution. The amount of equilibrium adsorption increased with the increasing initial TCconcentration, while decreased with the increasing TNTs dosage. The adsorption kinetics was also evaluatedby the pseudo-first-order and pseudo-second-order. The pseudo-second-order model was the best to describethe adsorption kinetics. The equilibrium adsorption data were analyzed with two isotherm models (Langmuirmodel and Freundlich model). The best agreement was achieved by the Langmuir isotherm with correlationcoefficient of 0.997, corresponding to maximum adsorption capacity of 111.1 mg g-1.
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