Three activated carbons are synthesized in a rotary reactor at different activation times. The adsorption isotherms of the samples are measured The pore size distribution of the samples is determined using combined Saito and Foley method, BJH method. An average potential function has been determined inside the cylindrical pores. The effect of activation time on the pore size distribution sample...

The Harkins–Jura isotherm equation was originally developed to interpret sigmoid or type II isotherms exhibited by gas–solid adsorption systems. Surprisingly, in the field of water contaminant adsorption, it has been exclusively used describe hyperbolic I since mid-2000s. Given availability several models capable handling data, we must ask ourselves: Is there a need for isotherm? To gain accept...

The Thomas model is the most common equation to describe dynamics of fixed-bed adsorption columns. However, its parameters’ validity strongly depends on region breakthrough curve considered for data fitting. A rigorous analysis based different error functions was carried out determine accuracy both linear and non-linear forms model. proved be more robust less susceptible experimental error, wit...

The adsorption potential of clay and sandy soil to remove benzene from liquid-phase system was examined. A series of batch adsorption tests were carried out for various concentrations of benzene (50 250 mg/l) in tightly corked 1000 ml flasks for clay and sandy soil, respectively. Equilibrium and kinetics data were obtained from the batch experiments. Adsorption increased with increasing initial...

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Simple fixed bed models such as the Bohart–Adams and Thomas equations are often used to describe breakthrough characteristics of water air contaminant adsorption in adsorbers. However, these popular confined correlating highly symmetric curves. The present study explores feasibility using two probability distributions (normal log-normal) track asymmetric curves for columns (ciprofloxacin, ammon...

The need to clean-up heavy metal contaminated environment can not be over emphasized. This paper describes the adsorption isotherm studies of Cd (II), Pb (II) and Zn (II) ions from aqueous solution using unmodified and EDTA-modified maize cob. Maize cob was found to be an excellent adsorbent for the removal of these metal ions. The amount of metal ions adsorbed increased as the initial concentr...