Kinetic and Isothermal Modelling of the Adsorption of Compounds from Olive Mill Wastewater onto Activated Carbon

Olive oil production generates solid and liquid wastes that cause various environmental problems due to their high phenols and polyphenols load. Although many treatment methods were investigated to manage these wastes, more research is still needed to identify simple and cost-effective approaches. In this study, activated carbon (AC) was prepared from olive cake waste and functionalized with Cu/Cu2O/CuO for efficient and selective removal of phenolic content from olive mill wastewater (OMW). AC media were characterized by scanning electron/dispersive X-ray spectroscopy (SEM-EDS), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectrometry, and Brunauer–Emmett–Teller (BET) surface area analysis. The optimum adsorption parameters were investigated, and the adsorption isotherms, thermodynamics, and kinetics were determined. The adsorption of phenols onto copper oxide AC was best described by the Langmuir adsorption with maximum adsorption capacity of 13.9, 12.7, and 9.9 mg/g at 311, 302, and 293 K, respectively. The adsorption reaction was found to be spontaneous and endothermic where ∆H° and ∆G° were found to be 30.104 kJ/mol and −1.765, −2.839, and −3.723 (kJ/mol) at 311, 302, and 293 K, respectively. In addition, the kinetics data were perfectly fit by the pseudo-second-order model. The activated product derived from recyclable olive cake and enriched with inorganic functionality can offer a cost-effective treatment solution for OMW; thus, reducing both the liquid and solid waste generated from the olive mill industry.

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Combined treatment of olive mill wastewater by multi-soil-layering ecotechnology and adsorption on activated carbon/lime

10.5004/dwt.2021.27595 ◽

2021 ◽

Vol 233 ◽

pp. 253-260

Author(s):

A. Ait-Hmane ◽

L. Mandi ◽

N. Ouazzani ◽

H. Ait Hammou ◽

A. Hejjaj ◽

...

Keyword(s):

Activated Carbon ◽

Combined Treatment ◽

Olive Mill Wastewater ◽

Soil Layering ◽

Olive Mill

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Towards a high yield recovery of polyphenols from olive mill wastewater on activated carbon coated with milk proteins: Experimental design and antioxidant activity

Food Chemistry ◽

10.1016/j.foodchem.2018.04.091 ◽

2018 ◽

Vol 262 ◽

pp. 102-109 ◽

Cited By ~ 18

Author(s):

Asma Yangui ◽

Manef Abderrabba

Keyword(s):

Antioxidant Activity ◽

Activated Carbon ◽

Experimental Design ◽

Milk Proteins ◽

Olive Mill Wastewater ◽

High Yield ◽

Carbon Coated ◽

Olive Mill

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Treatment of Olive Mill Wastewater by Catalytic Ozonation Using Activated Carbon Prepared from Olive Stone by KOH

Asian Journal of Chemistry ◽

10.14233/ajchem.2015.19106 ◽

2015 ◽

Vol 27 (11) ◽

pp. 4106-4110 ◽

Cited By ~ 9

Author(s):

Orkide Eren ◽

Sermin Gul ◽

Erdal Kusvuran ◽

Kemal Cellat ◽

Fatma Midik Ertosun

Keyword(s):

Activated Carbon ◽

Catalytic Ozonation ◽

Olive Mill Wastewater ◽

Olive Stone ◽

Olive Mill

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Screening of Commercial Catalysts for Steam Reforming of Olive Mill Wastewater

Renewable Energy ◽

10.1016/j.renene.2020.12.139 ◽

2021 ◽

Author(s):

Cláudio Rocha ◽

M.A. Soria ◽

Luís M. Madeira

Keyword(s):

Steam Reforming ◽

Olive Mill Wastewater ◽

Olive Mill

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Technoeconomic Analysis of the Recovery of Phenols from Olive Mill Wastewater through Membrane Filtration and Resin Adsorption/Desorption

Sustainability ◽

10.3390/su13042376 ◽

2021 ◽

Vol 13 (4) ◽

pp. 2376

Author(s):

Dimitris P. Zagklis ◽

Costas S. Papageorgiou ◽

Christakis A. Paraskeva

Keyword(s):

Capital Investment ◽

Membrane Filtration ◽

Hot Spot ◽

Treatment Method ◽

Olive Mill Wastewater ◽

Operational Cost ◽

Equipment Cost ◽

Fixed Capital Investment ◽

Adsorption Desorption ◽

Olive Mill

Olive mill wastewater is an important agro-industrial waste with no established treatment method. The authors have developed a phenol separation method that could potentially cover the treatment cost of the waste. The purpose of this study was to identify any economic hotspots in the process, the operational cost and examine the margin of profit for such a process. The equipment cost was scaled for different treatment capacities and then used to estimate the fixed capital investment and the yearly operational cost. The highest purchased equipment cost was identified for the membrane filtration system, while the cost for resin replacement was identified as the highest operational cost. The lifespan of the resin used in the adsorption step was identified as an economic hot spot for the process, with the phenols separation cost ranging from 0.84 to 13.6 €/g of phenols for a resin lifespan of 5–100 adsorption/desorption cycles. The lifespan of the resin proved to be the single most important aspect that determines the phenols separation cost. The price range that was calculated for the product of the process is very promising because of the typical value of antioxidants and the low concentration of phenols that are needed for food supplements and cosmetics.

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Biocomposite spheres based on aluminum oxide dispersed with orange-peel powder for adsorption of phenol from batch membrane fraction of olive mill wastewater

Colloids and Interface Science Communications ◽

10.1016/j.colcom.2021.100402 ◽

2021 ◽

Vol 42 ◽

pp. 100402

Author(s):

Jacques Romain Njimou ◽

John Godwin ◽

Hugues Pahimi ◽

S. Andrada Maicaneanu ◽

Fridolin Kouatchie-Njeutcha ◽

...

Keyword(s):

Aluminum Oxide ◽

Membrane Fraction ◽

Orange Peel ◽

Olive Mill Wastewater ◽

Olive Mill

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Antioxidant Properties of Olive Mill Wastewater Polyphenolic Extracts on Human Endothelial and Vascular Smooth Muscle Cells

Foods ◽

10.3390/foods10040800 ◽

2021 ◽

Vol 10 (4) ◽

pp. 800

Author(s):

Anna Maria Posadino ◽

Annalisa Cossu ◽

Roberta Giordo ◽

Amalia Piscopo ◽

Wael M Abdel-Rahman ◽

...

Keyword(s):

Antioxidant Activity ◽

Cell Death ◽

Smooth Muscle ◽

Vascular Smooth Muscle ◽

Smooth Muscle Cells ◽

Olive Oil ◽

Vascular Smooth Muscle Cells ◽

Muscle Cells ◽

Olive Mill Wastewater ◽

Olive Mill

This work aims to analyze the chemical and biological evaluation of two extracts obtained by olive mill wastewater (OMW), an olive oil processing byproduct. The exploitation of OMW is becoming an important aspect of development of the sustainable olive oil industry. Here we chemically and biologically evaluated one liquid (L) and one solid (S) extract obtained by liquid–liquid extraction followed by acidic hydrolysis (LLAC). Chemical characterization of the two extracts indicated that S has higher phenol content than L. Hydroxytyrosol and tyrosol were the more abundant phenols in both OMW extracts, with hydroxytyrosol significantly higher in S as compared to L. Both extracts failed to induce cell death when challenged with endothelial cells and vascular smooth muscle cells in cell viability experiments. On the contrary, the higher extract dosages employed significantly affected cell metabolic activity, as indicated by the MTT tests. Their ability to counteract H2O2-induced oxidative stress and cell death was assessed to investigate potential antioxidant activities of the extracts. Fluorescence measurements obtained with the reactive oxygen species (ROS) probe H2DCF-DA indicated strong antioxidant activity of the two OMW extracts in both cell models, as indicated by the inhibition of H2O2-induced ROS generation and the counteraction of the oxidative-induced cell death. Our results indicate LLAC-obtained OMW extracts as a safe and useful source of valuable compounds harboring antioxidant activity.

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