Comparison of cadmium hydroxide nanowires and silver nanoparticles loaded on activated carbon as new adsorbents for efficient removal of Sunset yellow: Kinetics and equilibrium study

Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Mehrorang Ghaedi

Abstract

Adsorption of Sunset yellow (SY) onto cadmium hydroxide nanowires loaded on activated carbon (Cd(OH)(2)-NW-AC) and silver nanoparticles loaded on activated carbon (Ag-NP-AC) was investigated. The effects of pH, contact time, amount of adsorbents, initial dye concentration, agitation speed and temperature on Sunset yellow removal on both adsorbents were studied. Following the optimization of variables, the experimental data were fitted to different conventional isotherm models like Langmuir, Freundlich, Tempkin and Dubinin-Radushkevich (D-R) based on linear regression coefficient R(2) the Langmuir isotherm was found to be the best fitting isotherm model and the maximum monolayer adsorption capacities calculated based on this model for Cd(OH)(2)-NW-AC and Ag-NP-AC were found to be 76.9 and 37.03mg g(-1) at room temperatures, respectively. The experimental fitting of time dependency of adsorption of SY onto both adsorbent shows the applicability of second order kinetic model for interpretation of kinetic data. The pseudo-second order model best fits the adsorption kinetics. Thermodynamic parameters such as enthalpy, entropy, activation energy, sticking probability, and Gibb's free energy changes were also calculated. It was found ...Continue Reading

References

Aug 29, 2006·Journal of Colloid and Interface Science·Vinod K GuptaShalini Sikarwar
Nov 13, 2007·Journal of Colloid and Interface Science·V K GuptaJyoti Mittal

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Citations

May 9, 2015·Materials Science & Engineering. C, Materials for Biological Applications·M RoostaM K Purkait
May 7, 2013·Journal of Environmental Management·Helan XuYiqi Yang
Mar 19, 2013·Materials Science & Engineering. C, Materials for Biological Applications·Mehrorang GhaediAsma Mihandoost
Aug 13, 2015·Toxicology and Industrial Health·Mehrorang GhaediMihir Kumar Purkait
Mar 24, 2016·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Hejun GaoYunwen Liao

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