Huang Y.,Southwest University of Science and Technology |
Wang W.,Southwest University of Science and Technology |
Wang W.,Laboratory of Solid Waste Treatment and Resource Recycle |
Feng Q.,Southwest University of Science and Technology |
And 3 more authors.
Journal of Saudi Chemical Society | Year: 2013
In this work, magnetic clinoptilolite/CoFe2O4 composites were prepared, and were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscope (TEM), vibrating sample magnetometer (VSM) and Zeta potential. The applicability of the synthesized composites for removal of Sr2+ from aqueous solutions was assessed, and the effective parameters such as initial pH values, adsorbent dosage, contact time, initial concentrations and temperatures on the sorption process were studied and optimized. The results showed that the Langmuir isotherm equation is the best to describe the sorption process. Adsorption kinetics of Sr2+ onto the composites followed the pseudo-second-order kinetic model. The thermodynamic parameters, such as ΔG0, ΔH0 and ΔS0, were also determined and evaluated. Moreover, the saturation magnetization of composites was measured as 11.31 emu g-1, which facilitated magnetic separation of the sample after adsorption process. © 2013.
Yang H.,Southwest University of Science and Technology |
Yang H.,Laboratory of Solid Waste Treatment and Resource Recycle |
Weijun L.,Southwest University of Science and Technology |
Weiqing W.,Southwest University of Science and Technology |
And 5 more authors.
Desalination and Water Treatment | Year: 2015
Carbon@REC nanocomposite (C@REC) was synthesized by a hydrothermal carbonization process, and characterized by XRD, Fourier transform infrared spectroscopy, thermal gravimetric analysis, SEM, nitrogen adsorption–desorption measurements, and zeta potential analysis. The adsorption property of the C@REC was investigated as a function of pH of solution, adsorbent dosage, contact time, and initial concentration of MB and NR. The results suggest that amorphous carbon supported on the surface of rectorite. The adsorption experiment showed that adsorption kinetics of MB and NR onto the followed the pseudo-second-order kinetic model. The adsorption isotherm data were fitted well to the Langmuir isotherm. The adsorption capacities for the removal of MB and NR on the C@REC determined using the Langmuir equation were 15.68 and 20.30 mg g−1, respectively. © 2015 Balaban Desalination Publications. All rights reserved.