We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Adsorption characteristics of Ni<sup>2+</sup> ion onto the diethylenetriaminepentaacetic acid-melamine / polyvinylidene fluoride blended resin.
- Authors
Xiaodan Zhao; Laizhou Song; Jun He; Tingying Wu; Ying Qin
- Abstract
The polyvinylidene fluoride blended resin (DTPA-MA/PVDF) adsorbent prepared by anchoring the chelating agent diethylenetriaminepentaacetic acid (DTPA) to the resin via the amide covalent bond reaction between DTPA and melamine(MA), was used to remove nickel from aqueous solutions. The blended resin was prepared using the combination of solution blending technique and phase inversion process. The blended resin was characterized by Fourier transform infrared spectroscopy (FTIR), 13C nuclear magnetic resonance spectroscopy (13C NMR), environmental scanning electron microscopy (ESEM) and N2 adsorption/desorption experiments. The sorption data was fit to linearized adsorption isotherms of the Langmuir, Freundlich, and D-R isotherms models. The batch sorption kinetics was evaluated using pseudo-first-order, pseudo-second-order, and intraparticle diffusion kinetic reaction models. ΔH° is less than 0, ΔG° is lower than 0, and ΔS° is greater than 0, which shows that the adsorption of Ni(II) by the blended resin is a spontaneous, exothermic process. The adsorption isotherm fits better to the Langmuir isotherm model and the pseudo-second-order kinetics model gives a better fit to the batch sorption kinetics. The adsorption mechanism is assumed to be ion exchange between the nickel ion and the polyamino polycarboxylic acid chelating group of the blended resin.
- Subjects
HEAVY metal absorption &; adsorption; DIETHYLENETRIAMINEPENTAACETIC acid; FOURIER transform infrared spectroscopy; NUCLEAR magnetic resonance spectroscopy; ENVIRONMENTAL scanning (Business); ION exchange (Chemistry); NUCLEAR reactors; THERMODYNAMICS; MELAMINE; ISOTHERMAL surfaces (Thermodynamics)
- Publication
International Journal of Energy & Environment, 2010, Issue 1, p121
- ISSN
2076-2895
- Publication type
Article