Proceedings title: Advanced Materials Research
Editors: Zhao J, Iranpour R, Li XY, Jin B
Publisher: Trans Tech Publications
Volume number: 726-731
Conference information: Advances in Environmental Technologies
Abstract: A novel surface ion-imprinted polymer (S-IIP) has been synthesized by surface ion-imprinting concept in the presence of sodium trititanate whisker, Sr(II), chitosan and γ-Glycidoxypropyl trimethoxysilane (KH-560) for selective solid-phase extraction (SPE) of trace Co(II) from aqueous solutions. Characterizations of S-IIP were achieved by FT-IR spectra, SEM and surface area measurement. Results showed that the adsorption of cobalt(II) onto S-IIP follows pseudo-second order kinetics and could be fitted by the Langmuir isotherm with the maximum adsorption capacity Q being 8.27 mg g-1 at 25 °C. Thermodynamic parameters including Δ Hº, Δ Gº and Δ Sº were calculated and it is indicated that Co(II) adsorption on S-IIP is exothermic, spontaneous and physical adsorption reaction. Moreover, according to the dimensionless separation factor RL (RL < 1) it indicates that it's a highly favourable adsorption. Finally, the detection limit (3s) of 5.6 ng mL-1 with the relative standard deviation (RSD) for 1.0 μg mL-1 cobalt(II) of 1.86% (n=10) were obtained.
Template and target information: cobalt ion, Co(II)
Author keywords: cobalt(II), isotherm, kinetics, Solid-Phase Extraction (SPE), surface imprinting