scholarly journals UPGRADING OF MOROCCAN OLIVE MILL WASTEWATER USING ELECTROCOAGULATION: KINETIC STUDY AND PROCESS PERFORMANCE EVALUATION

2017 ◽  
pp. 30-41 ◽  
Author(s):  
Reda Elkacmi ◽  
Noureddine Kamil ◽  
Mounir Bennajah
Keyword(s):  
Kinetic Study ◽  
Current Density ◽  
Olive Mill Wastewater ◽  
Pollutant Removal ◽  
Variable Order ◽  
Order Kinetic ◽  
Pseudo Second Order ◽  
Dark Color ◽  
Model Equations ◽  
Olive Mill

Treatment of olive mill wastewater (OMW) by electrocoagulation (EC) was investigated in a stirred tank reactor (STR), the effect of different influential parameters, namely, contact time, current density and pH was determined. Over 72 % of COD, 93 % of polyphenols and 95 % of color intensity were removed efficiently at pH of 5.2, current density of 58.33 mA/cm2 and a residence time of 45 min. A kinetic study of these three parameters was carried out and both COD and dark color removal obey the first-order law model. On the other hand, the polyphenols reduction, fits the pseudo second-order model with current- dependent parameters. A variable order kinetic (VOK) model derived from the Langmuir-Freundlish equation was proposed to determine the kinetics of pollutant removal reactions with EC. Results showed that the model equations strongly fit the experimental concentrations of the three pollutants.

Kinetic study of anaerobic digestion of olive mill wastewater previously fermented with Aspergillus terreus

1993 ◽  
Vol 28 (6) ◽  
pp. 397-404 ◽  
Author(s):  
R. Borja ◽  
S.E. Garrido ◽  
L. Martínez ◽  
A. Ramos-Cormenzana ◽  
A. Martín
Keyword(s):  
Anaerobic Digestion ◽  
Kinetic Study ◽  
Aspergillus Terreus ◽  
Olive Mill Wastewater ◽  
Olive Mill

scholarly journals Study of The Sorption of The Total Phenolic Compounds From Olive Mill Wastewater By Natural Soils: Conventional and Under Microwave Irradiation Kinetics.

2021 ◽  
Author(s):  
Malika Arabi ◽  
Abdelhamid Elias ◽  
Yasmine Ait Younes ◽  
Ziane Kamel ◽  
Idir Toumert ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Microwave Irradiation ◽  
Olive Mill Wastewater ◽  
Inorganic Materials ◽  
Total Phenolic ◽  
Mineral Matter ◽  
Order Kinetic ◽  
Total Phenolic Compounds ◽  
Mineralogical Characterization ◽  
Olive Mill

Abstract The elimination of total phenolic compounds (TPC) from olive mill wastewater was studied by sorption under the conditions: conventional and under microwave irradiation on previously characterized soils. The sorption process has been studied in batch using inorganic materials in their natural states for sustainable development.The characterizations of the soils have shown variability in potential of hydrogen (4.6-8.9) in total nitrogen between 0.5 and 2.5% and in mineral matter which varies between 5.86 and 15.16%. On the other hand, the mineralogical characterization showed that the three soils are composed of several clay and non-clay minerals.The experimental data were analyzed using reaction models and diffusion models. The pseudo second order kinetic model provides the best correlation. It best represents the kinetics of adsorption by the natural adsorbents N1, N3 and R.The sorption models of LANGMUIR, FREUNDLICH and DUBININ-RADUSHKEVICH were used for the mathematical description of the conventional adsorption equilibrium. The best correlations were obtained with the model of LANGMUIR (r2 > 0.95) on soils N1 and N3 unlike the models of FREUNDLICH and DUBININ-RADUSHKEVICH (r2 < 0.65). The soil R can be represented by the model of FREUNDLICH (r2 ≥ 0.96) and the model of LANGMUIR (r2 > 0.93). The latter is confirmed by the value of the dimensionless coefficient RL. Removal rates of TPC were calculated. The value obtained (71 %) showed that the soil N1 is a good adsorbent. The results are satisfactory and promising.

scholarly journals Porous Multifunctional Phenylcarbamoylated-β-Cyclodextrin Polymers for Rapid Removal of Organic Pollutants

2021 ◽  
Author(s):  
He Wang ◽  
Congzhi Liu ◽  
Xiaofei Ma ◽  
Yong Wang
Keyword(s):  
Organic Contaminants ◽  
Adsorption Process ◽  
Removal Rate ◽  
Pollutant Removal ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Monolayer Adsorption ◽  
Pseudo Second Order ◽  
Rapid Removal ◽  
Cyclodextrin Polymers

Abstract In this work, a series of porous multifunctional cyclodextrin (CD) polymers were fabricated using tetrafluoroterephthalonitrile (TFTPN) as the rigid crosslinker for the condensation of different functional phenylcarbamoylated-β-cyclodextrin derivatives to afford three preliminary polymerized adsorption materials such as poly nitrophenylcarbamoylated-β-cyclodextrin (NO2-CDP), poly trifluoromethylphenylcarbamoylated-β-cyclodextrin (F-CDP), poly chlorophenylcarbamoylated-β-cyclodextrin polymers (Cl-CDP) and a mix β- cyclodextrin polymer (X-CDP) prepared via a secondary crosslinking procedure of the above three materials. The X-CDP preparation process connects the `pre-formed nanoparticles and increases the presence of linkers inside the particles. At the same time, X-CDP exhibited porous structure with various functional groups such as nitro, chlorine, fluorine and hydroxyl. Those special characteristics render this material with good adsorption ability towards various pollutants in water, including tetracycline, ibuprofen, dichlorophenol, norfloxacin, bisphenol A, naphthol. Especially the maximum adsorption capacity for tetracycline at equilibrium reached 230.15 mg·g− 1, which is competitive with the adsorption capacities of other polysaccharides adsorbents. X-CDP removed organic contaminants much more quickly than other adsorbents, reaching almost ~ 95% of its equilibrium in only 30 s. The main adsorption process of the pollutants by X-CDP fitted the pseudo-second-order kinetic and Langmuir isotherm well, indicating that the adsorption process is monolayer adsorption. Moreover, X-CDP possessed the good reusability where the pollutant removal rate was only reduced 8.3% after five cycles.

scholarly journals Organic Pollutants Removal from Olive Mill Wastewater Using Electrocoagulation Process via Central Composite Design (CCD)

Water ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 3522
Author(s):  
Abeer El Shahawy ◽  
Inas A. Ahmed ◽  
Mahmoud Nasr ◽  
Ahmed H. Ragab ◽  
Saedah R. Al-Mhyawi ◽  
...  
Keyword(s):  
Weight Loss ◽  
Current Density ◽  
Operating Cost ◽  
Oxygen Demand ◽  
Olive Mill Wastewater ◽  
Cod Removal ◽  
Electrolysis Time ◽  
Faraday’S Law ◽  
Central Composite ◽  
Olive Mill

Electrocoagulation (EC) was studied in this study as a potential alternative approach for treating Olive Mill Wastewater (OMW). Aluminum plates were utilized as anode and cathode to evaluate the removal of Chemical Oxygen Demand (COD) from OMW and the aluminum electrode’s weight loss. Central Composite Experimental Design (CCD) and Response Surface Methodology were used to optimize its performance. Anodes were weighed before and after each electrocoagulation experiment, to compare the experimental and the theoretical dissolved aluminum weights calculated using Faraday’s law. We discovered the following EC conditions for CCD: current density = 15 mA/cm2, pH = 4, and electrolysis time of 30 min. Under these conditions, the maximum COD removal ratio was 41%, equating to an Al weight loss of 288.89 g/m3 at an estimated operating cost of 1.60 USD/m3. According to the response optimizer, the most economical operating settings for COD removal efficiency of 58.888% are pH 4, a current density of 18.41 mA/cm2, electrolysis time of 36.82 min, and Al weight loss of 337.33 g/m3, with a projected running cost of 2.00 USD/m3.

Kinetic study and Box–Behnken design approach to optimize the sorption process of toxic azo dye onto organo-modified bentonite

2020 ◽  
Vol 98 (5) ◽  
pp. 215-221
Author(s):  
Brahim Guezzen ◽  
Mehdi Adjdir ◽  
Baghdad Medjahed ◽  
Mohamed A. Didi ◽  
Peter G. Weidler
Keyword(s):  
Aqueous Solution ◽  
Kinetic Study ◽  
Azo Dye ◽  
Dye Removal ◽  
Sorption Process ◽  
Exchange Capacity ◽  
Second Order ◽  
Order Kinetic ◽  
Box Behnken Design ◽  
Pseudo Second Order

Kinetic study was applied for sodium bentonite (Na-B) and hexadecylpyridinium bentonite (HDP-B) under different amounts, namely 50% (50HDP-B), 100% (100HDP-B), and 200% (200HDP-B) with respect to cation exchange capacity (CEC). Pseudo first-order and pseudo second-order kinetic models were performed to optimize the sorption of Congo red (CR) dye from aqueous solution. The experimental data fit the pseudo second order kinetic model well. The sorption capacity (qe) of CR dye by the organo-bentonites at equilibrium was 36.0 mg g−1 (72.1%) for 50HDP-B, 48.05 mg g−1 (96.1%) for 100HDP-B, and 49.2 mg g−1 (98.4%) for 200HDP-B. These results were considerably higher than that found by Na-B. Response surface methodology with three-variable, three-level Box–Behnken design was applied for 100HDP-B to describe the removal of CR dye. The effects of three variables, namely temperature, adsorbent dosage, and initial dye concentration, were studied. Predicted values of adsorption efficiency were found to be in good agreement with the obtained experimental values (R2 = 0.97). A second-order polynomial model successfully described the effects of independent variables on the CR dye removal. At the optimized condition, the toxic azo dye could be quantitatively removed from aqueous solution. The results of the present study suggest that the organo-bentonite can be used as an efficient sorbent for dye removal from aqueous solution.

scholarly journals Kinetic Study of the Adsorption of Polyphenols from Olive Mill Wastewater onto Natural Clay: Ghassoul

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Safae Allaoui ◽  
Mohammed Naciri Bennani ◽  
Hamid Ziyat ◽  
Omar Qabaqous ◽  
Najib Tijani ◽  
...  
Keyword(s):  
Olive Mill Wastewater ◽  
Area Measurement ◽  
Natural Clay ◽  
Freundlich Model ◽  
X Ray ◽  
Bet Method ◽  
Surface Area Measurement ◽  
Pseudo Second Order ◽  
Function Relationship ◽  
Olive Mill

The aim of this study is based on natural clay as an adsorbent in the elimination of polyphenols from olive mill wastewater (OMW). This clay was analyzed using XRD, SEM/EDX, FTIR, surface area measurement (BET method), thermal analysis (TGA/DTA), and X-ray fluorescence (XRF) and then used in adsorption experiments. The results reveal that the best quantity of adsorption of polyphenols is 161 mg/g at the temperature of 25°C, but they decrease at 35°C and 45°C. A great agreement with pseudo-second-order and Freundlich model is represented by kinetic and isotherms models, and several parameters such as ΔG0, ΔS0, and ΔH0 were determined using the thermodynamic function relationship.

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