Fractal adsorption characteristics and statistical analysis approach of complex dye molecule on metal oxide particles—A case study of Reactive Black 5(RB 5) adsorption onto NiO nanoparticles
Abstract
In this study, environmental conditions for high efficient dye adsorption; initial pH, initial dye concentration, temperature, adsorbent concentration were determined as 6.0, 40oC, 100 mgL-1 and 1 g L-1, respectively. Obtained results from SEM, FT-IR and XRD analyzes were evaluated and compared with foundings in literature.
It was found that the equilibrium data can be best represented with Langmuir isotherm model, and it was concluded that RB 5-NiO adsorption system behaviour was explained the pseudo-second order kinetic model successfully. It was concluded that dye-nanoadsorbent system was exothermic (ΔH <0) and voluntary (ΔG<0). In thermodynamic analysis, RB 5 to NiO system adsorption proved that system has no structural change (S <0) at the adsobent-solution interface.
RSM (Response Surface Method) was used to express the interaction between process variables and responses and to examine the adsorption data. Removal percentages were determined theoretically using Design Expert 9.0.6 software program, and quadratic regression model was developed. It was seen that the adsorption parameters for the highest color removal obtained by the classical method were compared with the parameters found from RSM approach obtained under the same experimental conditions support each other.
Keywords
adsorption, RSM, nanotechnology
Supporting Institution
Mersin Üniversitesi
Thanks
We would like to thank Mersin University Cemical Engineering Laboratories and Advanced Technology Education, Research and Application Center, which was used in determination of particle surface properties in experimental studies.
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