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Aikaterini Vavouraki
School of Mineral Resources Engineering, Technical University of Crete, 73100 Chania, Crete, Greece
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Removal of Polyphenols from Olive Mill Wastewater by FPX 66 Resin: Part II. Adsorption Kinetics and Equilibrium Studies
Author(s): Aikaterini Vavouraki*
Adsorption experiments of polyphenols from olive mill wastewater (OMW) using a cross-linked styrene– divinylbenzene polymer namely FPX 66 as a sorbent have been conducted. In particular the process of adsorption of phenolic compounds and carbohydrate derived from OMW by FPX 66 was rapid. A 68 and 60% reduction of polyphenols and carbohydrates, respectively was observed within the first 1 h. FPX 66 resin adsorption capacity increased by increasing polyphenol concentration values. At OMW-effluent-pH below 7.5 polyphenol removal from FPX 66 was high (77%) and for pH greater than 9.0 decreased (40%). Adsorption kinetics and equilibrium studies were carried out, fitting the equilibrium data to both Langmuir and Freundlich models. Batch adsorption models, based on the assumption of the pseudo-first-order, pseudo-second-order and intraparticle diffusion mechanism showed that kinetic da.. View more»