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Research topic

Adsorption and biosorption for pollutant removal

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Research papers

2017 · Journal of Chemistry · 2,903 citations

Modelling and Interpretation of Adsorption Isotherms

The need to design low-cost adsorbents for the detoxification of industrial effluents has been a growing concern for most environmental researchers. So modelling of experimental data from adsorption processes is a very important means of predicting the mechanisms of various adsorption systems. Therefore, this paper presents an overall review of the applications of adsorption isotherms, the use of linear regression analysis, nonlinear regression analysis, and error functions for optimum adsorption data analysis.

2012 · IOSR Journal of Applied Chemistry · 1,932 citations

Langmuir, Freundlich, Temkin and Dubinin–Radushkevich Isotherms Studies of Equilibrium Sorption of Zn 2+ Unto Phosphoric Acid Modified Rice Husk

Equlibrium sorption of the phosphoric acid modified rice husk was studied. The Physico-chemical properties of the modified rice husk were determined. The equilibrium sorption data were fitted into Langmuir, Freundlich, Temkin and Dubinin-Radushkevich (DRK) isotherms. Of the four adsorption isotherm, the R 2 value of Langmuir isotherm model was the highest. The maximum monolayer coverage (Q o ) from Langmuir isotherm model was determined to be 101.01mg/g, the separation factor indicating a favourable sorption experiment is 0.133. Also from Freundlich Isotherm model, the sorption intensity (n) which indicates favourable sorption and the correlation value are 1.6 and 0,89 respectively. The heat of sorption process was estimated from Temkin Isotherm model to be 25.34J/mol and the mean free energy was estimated from DRK isotherm model to be 0.7KJ/mol which vividly proved that the adsorption experiment followed a physical process.