Non-linear Modelling of Phenol Adsorption Using Porous and Non-porous Low Cost Sorbents
نویسندگان
چکیده
Three isotherm models were used to describe adsorption equilibrium of a toxic chemical compound, phenol, onto a non porous adsorbent (Mediterranean Posidonia oceanica fibres) and a porous adsorbent, activated carbon prepared from Caribbean Vetiveria zizanoides roots. The adsorption characteristic parameters obtained were calculated using classical adsorption isotherm, i.e. the Langmuir (LI), Freundlich (FI) and Redlich-Peterson (RPI) isotherms. Calculation of the error deviation was performed using both R2 and the average relative error (ARE). Thus, among the studied models, the Langmuir equation involving adsorption on a homogeneous actives site is definitely the most suitable modelling tool to satisfactorily describe biosorption of phenol on Posidonia and vetiver-derived activated carbon, by providing the highest squared correlation coefficients and the lowest ARE.
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