Recovery of low molecular weight phenols through solid-phase extraction

Ferri, Francesco; Bertin, Lorenzo; Scoma, Alberto; Marchetti, Léonardo; Fava, Fabio

doi:10.1016/j.cej.2010.11.090

Cited by 75 publications

(27 citation statements)

References 48 publications

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“…Nevertheless, when the recovery of phenols is carried out with ENV?, the protocol has to be adjusted from time to time. Considering the study conducted by Ferri et al [191], the highest phenol adsorption (76 %) was achieved using IRA96 polar resin. Conversely, non-polar adsorbents allowed higher desorption ratios.…”

Section: Adsorptionmentioning

confidence: 92%

Recovery and Removal of Phenolic Compounds from Olive Mill Wastewater

Rahmanian

Jafari

Galanakis³

2013

J Americ Oil Chem Soc

279

110

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Food wastes are today considered as a cheap source of valuable components since the existent technologies allow the recovery of target compounds and their recycling inside the food chain as functional additives in different products. Olive mill wastewater (OMW) is generated from olive oil extraction systems. It has high addedvalue compounds namely phenolics, recalcitrants, pectin, and some important enzymes. It causes a certain amount of toxicity/phytotoxicity because of its phenolic compounds. OMW also has significant impacts when discharged directly into surface waters. Therefore, the treatment of olive mill wastewater is very much needed. Several types of techniques have been investigated for OMW treatment along with recovery and removal of its phenolic compounds. Among these techniques, physical ones are utilized for extraction purposes, while chemical and biological methods are applied in order to diminish organic load. In this review, current status and recent developments in the recovery and removal of phenolic compounds from OMW have been critically examined.

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Section: Adsorptionmentioning

confidence: 92%

Recovery and Removal of Phenolic Compounds from Olive Mill Wastewater

Rahmanian

Jafari

Galanakis³

2013

J Americ Oil Chem Soc

279

110

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“…However, no effective phenol extraction and purification is possible from such complex and heterogeneous matrices, which have to be disposed as solid waste or can eventually combusted for energy production [17]. The use of macroporous resins [19,20], however, offers significant advantages over many other conventional methods, including a minimum of a 10-fold increase in sample loading capacity, higher selectivity, easier desorption, lower solvent consumption, absence of chemical residues in the product, better mechanical strength and ability to reuse and also improved cost efficiency [21][22][23][24]. The pH of the solution constitutes a parameter that strongly influences the adsorption capacity of a macroporous resin, due to its influence on the adsorption mechanisms.…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

A study on the kinetics of olive mill wastewater (OMWW) polyphenols adsorption on the commercial XAD4 macroporous resin

Petrotos

Gkoutsidis

Kokkora

et al. 2013

Desalination and Water Treatment

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A B S T R A C TThe commercially available macroporous resin XAD4 was evaluated for its capacity to adsorb the polyphenols contained in olive mill wastewater (OMWW). The adsorption was performed in the mode of fixed packed bed contactor. The effects of OMWW flow rate, temperature, dilution and pH on the resin adsorption capacity were investigated. Polyphenols concentration decreased with time. The pattern of the total polyphenols concentration dependence on time was found similar in all cases. The pattern included a very steep section for roughly the first 2 h of the operation, followed by a second section of decreasing gradient down to a final asymptotic equilibrium limit. Neither the time required for approaching the equilibrium nor the magnitude of the equilibrium concentration was substantially affected by the OMWW temperature. The increase of OMWW flow rate affected markedly the speed of approaching the equilibrium but not its position. The variation of the total polyphenols concentration showed that higher concentrations yielded more rapid kinetics at the initial section, but no apparent differentiation of the time was required to approach equilibrium. Acidic pH appeared to be favourable for the adsorption. Finally, a novel modelling approach was developed to simulate the adsorption process kinetics.

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“…The recovery of hydroxycinnamic compounds was mostly proposed by membrane processes and liquid-liquid extraction, semipreparative HPLC, precipitation-adsorption, solid phase extraction (SPE) with diverse resins (Amberlite XAD7, XAD16,…) [5][6][7][8][9][10][11][12]. Adsorption enables the separation of selected compounds from dilute solutions.…”

Section: Introductionmentioning

confidence: 99%