Synthesis,characterization and application of zinc oxide nano particles for removal of hexavalent chromium |
| |
| Authors: | Mayank Pandey B D Tripathi |
| |
| Institution: | 1.Institute of Environment and Sustainable Development,Banaras Hindu University,Varanasi,India;2.Department of Environmental Studies,P.G.D.A.V. College (Evening), University of Delhi,New Delhi,India;3.Department of Botany for Advanced Studies,Banaras Hindu University,Varanasi,India |
| |
| Abstract: | The present study was conducted to evaluate the adsorption efficiency of synthesized nano zinc oxide (n-ZnO) for the removal of hexavalent chromium (Cr6+). The synthesized sample was characterized by X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy. Batch experiment results revealed that low dose (4 g L?1) of n-ZnO was highly efficient at the initial metal concentration of 9 mg L?1 in acidic conditions (pH 2) at 50 °C for the contact time of 90 min. A Langmuir adsorption isotherm model was found to be best fitted indicating a homogeneous surface and the adsorption followed pseudo-second order kinetics. Intra-particle diffusion was not a rate limiting factor in the present study. Thermodynamic study revealed that the adsorption process was endothermic and spontaneous at all the studied temperatures with increasing randomness. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
