scholarly journals Heterogeneous Photo-Fenton Reaction for Olive Mill Wastewater Treatment—Case of Reusable Catalyst

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 557
Author(s):  
Cristina Agabo-García ◽  
Naima Calderón ◽  
Gassan Hodaifa
Keyword(s):  
Fenton Reaction ◽  
Heterogeneous Catalysts ◽  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Olive Mill Wastewater ◽  
Total Phenolic ◽  
Reusable Catalyst ◽  
Agitation Rate ◽  
Operational Conditions ◽  
Olive Mill

Heterogeneous catalysts can be an efficient and economical option for olive mill wastewater (OMW) treatment by an advanced oxidation process if they could be reused. In this work, OMW was treated using a heterogeneous photo-Fenton reaction (artificial ultraviolet light/H2O2/HFeO2). For this purpose, different concentrations of HFeO2 were tested: 0.04; 0.3; 0.8; 5.0; 10.0; 20.0; 30.0, and 50.0 g/L. The following operational conditions were chosen: pH = 3.0, temperature = 20 °C, agitation rate = 700 rpm. The experimental results showed high removal percentages of the main OMW characterization parameters at 50 g/L of HFeO2: %CODremoval = 62.8%; %total phenolic compounds (TPCs) = 88.9%. These results were also compared with those of other control oxidation systems, i.e., UV, H2O2, and UV/H2O2, which provided 35.5 and 56.1%; 46.2 and 74.0%; 48.0 and 76.8% removal, respectively. In addition, the catalyst was reused three times, recovering more than 90.5% of it.

scholarly journals Screening of low-cost materials as heterogeneous catalysts for olive mill wastewater Fenton’s peroxidation

2020 ◽  
Vol 6 ◽  
pp. 161-167
Author(s):  
E. Domingues ◽  
F. Rodrigues ◽  
J. Gomes ◽  
M.J. Quina ◽  
S. Castro-Silva ◽  
...  
Keyword(s):  
Heterogeneous Catalysts ◽  
Low Cost ◽  
Olive Mill Wastewater ◽  
Olive Mill

Reuse of Homogeneous Fenton’s Sludge from Detergent Industry as Fenton’s Catalyst

2013 ◽  
Vol 16 (2) ◽  
Author(s):  
André F. Rossi ◽  
Rui C. Martins ◽  
Rosa M. Quinta-Ferreira
Keyword(s):  
Hydrogen Peroxide ◽  
Hydroxyl Radicals ◽  
Heterogeneous Catalysts ◽  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Iron Catalyst ◽  
Advanced Oxidation ◽  
Detergent Industry ◽  
Oxidizing Agent ◽  
Fenton’S Reaction

AbstractFenton’s reaction is an advanced oxidation process where, classically, hydrogen peroxide is the oxidizing agent and an iron catalyst promotes the formation of hydroxyl radicals (•OH). Among the studies that evaluated different metals as Fenton-like catalysts, our group of investigation has recently used cerium-based solids as heterogeneous catalysts in slurry reaction and, in this work, iron sludge coming from an industrial Fenton’s reactor used for the wastewater depuration of a detergent production factory is being appraised while treating a synthetic effluent containing 0.1 g.L

scholarly journals Enrichment of Phenolic Compounds from Olive Mill Wastewater and In Vitro Evaluation of Their Antimicrobial Activities

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Saleh Abu-Lafi ◽  
Mahmoud Sami Al-Natsheh ◽  
Reem Yaghmoor ◽  
Fuad Al-Rimawi
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Olive Oil ◽  
Acid Value ◽  
Antimicrobial Activities ◽  
Olive Mill Wastewater ◽  
Total Phenolic ◽  
The Stability ◽  
Olive Mill

The production of olive oil generates massive quantities of by-product called olive mill wastewater (OMWW). The uncontrolled disposal of OMWW poses serious environmental problems. The OMWW effluent is rich in several polyphenolic compounds. Liquid-liquid extraction of OMWW using ethyl acetate solvent was used to enrich phenolic compounds under investigation. Total phenolic and flavonoid content and antioxidant activity of the extract were determined. HPLC coupled to photodiode array (PDA) detector was used to analyze the main three phenolic compounds of OMWW, namely, hydroxytyrosol, tyrosol, and oleuropein. The antimicrobial activity of the extract was also investigated. Additionally, the OMWW extract was used as natural preservative and antioxidants for olive oil. Results showed that OMWW is very rich in phenolic compounds and has strong antioxidant activity. HPLC analysis showed that the extract contains mainly hydroxytyrosol and tyrosol but no oleuropein. The OMWW extract showed also positive activities as antibacterial (gram positive and gram negative) and antifungal as well as activities against yeast. The addition of OMWW extract to olive oil samples has an effect on the stability of olive oil as reflected by its acid value, peroxide value, K232 and K270, and total phenolic content.

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 A Novel Technique Using Advanced Oxidation Process (UV-C/H2O2) Combined with Micro-Nano Bubbles on Decontamination, Seed Viability, and Enhancing Phytonutrients of Roselle Microgreens

Horticulturae ◽  
2022 ◽  
Vol 8 (1) ◽  
pp. 53
Author(s):  
Surisa Phornvillay ◽  
Suwanan Yodsarn ◽  
Jiraporn Oonsrithong ◽  
Varit Srilaong ◽  
Nutthachai Pongprasert
Keyword(s):  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Microbiological Quality ◽  
Advanced Oxidation ◽  
Ascorbic Acid Content ◽  
Biochemical Properties ◽  
Total Phenolic ◽  
E Coli ◽  
Hydroxy Radicals ◽  
Uv C

Microbial contamination commonly occurs in microgreens due to contaminated seeds. This study investigated the decontamination effects of water wash (control), 5% hydrogen peroxide (H2O2), UV-C (36 watts), advanced oxidation process (AOP; H2O2 + UV-C), and improved AOP by combination with microbubbles (MBs; H2O2 + MBs and H2O2 + UV-C + MBs) on microbial loads, seeds’ viability, and physio-biochemical properties of microgreens from corresponding roselle seeds. Results showed that H2O2 and AOP, with and without MBs, significantly reduced total aerobic bacteria, coliforms, Escherichia coli (E. coli), and molds and yeast log count in seeds as compared to the control. Improved AOP treatment of H2O2 + UV-C + MBs significantly augmented antimicrobial activity against total bacteria and E. coli (not detected,) as compared to control and other treatments due to the formation of the highest hydroxy radicals (5.25 × 10−13 M). Additionally, H2O2 and combined treatments promoted seed germination, improved microbiological quality, total phenolic, flavonoids, and 2,2-diphenyl-1-picrylhydrazyl radical (DPPH•) activity of the grown microgreens. Ascorbic acid content was induced only in microgreens developed from H2O2-treated seeds. Single UV-C treatment was ineffective to inactivate the detected microorganism population in seeds. These findings demonstrated that improved AOP treatment (H2O2 + UV-C + MBs) could potentially be used as a new disinfection technology for seed treatment in microgreens production.

scholarly journals Effective Approach of Activated Jordanian Bentonite by Sodium Ions for Total Phenolic Compounds Removal from Olive Mill Wastewater

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Khansaa Al-Essa ◽  
Ethar M. Al-Essa
Keyword(s):  
Phenolic Compounds ◽  
Adsorption Process ◽  
Olive Mill Wastewater ◽  
Bet Surface Area ◽  
Total Phenolic ◽  
Sodium Ions ◽  
Total Phenolic Compounds ◽  
Water Shortages ◽  
Physiochemical Parameters ◽  
Olive Mill

Olive mill wastewater (OMW) is nowadays considered a serious environmental problem, especially within the Mediterranean region. With this in mind, water shortages are also a very serious and prevalent concern in third world countries. The aim of this study is to investigate the feasibility of using Jordanian bentonite, a simple and natural clay, as a possible adsorbent to decrease the negative characteristics of raw OMW, as an approach to the development of a methodology that addresses the OMW problem without affecting freshwater resources. The purified bentonite was activated by sodium ions at room temperature. FTIR, XRD, TGA, and BET surface area measurements were performed. OMW was contacted with both purified and activated bentonite in the batch technique to figure out the optimum parameters for the adsorption process. Physiochemical parameters of OMW were measured before and after treatment. The maximum adsorption qm was found as 8.81 mg/g at 323 K for the total phenolic compounds. The Langmuir and Freundlich models were utilized to describe the equilibrium isotherms and both models fit well. The parameters of thermodynamic show that the adsorption process was feasible, spontaneous, and endothermic in nature. These promising results along with the sodium activation of bentonite significantly improve bentonite’s adsorption capacity.

Kinetic Parameters of Hydrothermal Oxidation Process on Olive Mill Wastewater

2008 ◽  
Vol 25 (2) ◽  
pp. 131-138 ◽  
Author(s):  
Souad Chkoundali ◽  
Sahbi Alaya ◽  
Jean-Claude Launay ◽  
François Cansell
Keyword(s):  
Kinetic Parameters ◽  
Oxidation Process ◽  
Olive Mill Wastewater ◽  
Hydrothermal Oxidation ◽  
Olive Mill

scholarly journals Degradation of Paracetamol by an UV/Chlorine Advanced Oxidation Process: Influencing Factors, Factorial Design, and Intermediates Identification

2018 ◽  
Vol 15 (12) ◽  
pp. 2637 ◽  
Author(s):  
Yen Dao ◽  
Hai Tran ◽  
Thien Tran-Lam ◽  
Trung Pham ◽  
Giang Le
Keyword(s):  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
High Resolution Mass Spectrometry ◽  
Advanced Oxidation ◽  
Transformation Products ◽  
Solution Ph ◽  
Operational Conditions ◽  
First Order ◽  
First Order Kinetics ◽  
Degradation Rate Constant

The combination of a low-pressure mercury lamp and chlorine (UV/chlorine) was applied as an emerging advanced oxidation process (AOP), to examine paracetamol (PRC) degradation under different operational conditions. The results indicated that the UV/chlorine process exhibited a much faster PRC removal than the UV/H2O2 process or chlorination alone because of the great contribution of highly reactive species (•OH, •Cl, and ClO•). The PRC degradation rate constant (kobs) was accurately determined by pseudo-first-order kinetics. The kobs values were strongly affected by the operational conditions, such as chlorine dosage, solution pH, UV intensity, and coexisting natural organic matter. Response surface methodology was used for the optimization of four independent variables (NaOCl, UV, pH, and DOM). A mathematical model was established to predict and optimize the operational conditions for PRC removal in the UV/chlorine process. The main transformation products (twenty compound structures) were detected by liquid chromatography coupled to high-resolution mass spectrometry (LC-HRMS).

scholarly journals Using Peroxymonosulfate-Ozone Advanced Oxidation For The Treated Wastewater Disinfection and Amoxicillin Micro-Pollutant Removal Simultaneously

2021 ◽  
Author(s):  
Gagik Badalians Gholikandi ◽  
Atefeh Mollazadeh ◽  
Hamidreza Farimaniraad ◽  
Hamidreza Masihi
Keyword(s):  
Removal Efficiency ◽  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Wastewater Treatment Plants ◽  
Oxygen Demand ◽  
Advanced Oxidation ◽  
Pollutant Removal ◽  
Treated Wastewater ◽  
Total Coliforms ◽  
Operational Conditions

Abstract Due to the recent efforts to improve the conventional disinfection methods efficiency of wastewater treatment plants effluent, in this study, the efficiency of the peroxymonosulfate-ozone (PMS+O3) advanced oxidation process in lab scale by the aim of disinfection and simultaneous removal of existing amoxicillin micro-pollutant under optimum operational condition was investigated for the first time. Furthermore, the results were compared with those obtained from the experiments conducted employing persulfate-ozone (PS+O3), hydrogen peroxide-ozone (H2O2+O3), and ozonation (O3) processes. For this purpose, the main parameters including the total coliforms, amoxicillin concentration, turbidity, chemical oxygen demand (COD), biochemical oxygen demand (BOD5), total nitrogen (TN), electrical conductivity (EC), total dissolved solids (TDS), and total suspended solids (TSS) were considered. The test results show that under optimized operational conditions (retention time of 20 minutes, ozone dosage rate of 0.83 mmol/L, and peroxymonosulfate concentration of 0.06 mmol , 99.99% total coliforms (e.g., the number of total coliforms reached consistently less than 400 MPN in 100 ml) removal was reached by peroxymonosulfate-ozone advanced oxidation process. Also, amoxicillin concentration removal efficiency reached 90±2%. In comparison, although the total coliforms reduction of PS+O3 and H2O2+O3 methods in 30 min are approximately the same, the amoxicillin concentration removal efficiency is about 60-70%. Due to the importance of ensuring effluent quality, the related removal efficiency of other considered parameters is also evaluated and presented. Eventually, the peroxymonosulfate-ozone method can be considered as a novel efficient approach for wastewater plants effluent disinfection and amoxicillin micro-pollutant removal simultaneously which is a novel approach.

scholarly journals Inactivation of Ascaris eggs in water using sequential solar driven photo-Fenton and free chlorine

2011 ◽  
Vol 10 (1) ◽  
pp. 20-30 ◽  
Author(s):  
Erick R. Bandala ◽  
Liliana González ◽  
Jose Luis Sanchez-Salas ◽  
Jordana H. Castillo
Keyword(s):  
Fenton Reaction ◽  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Free Chlorine ◽  
Process Efficiency ◽  
Time Process ◽  
Fenton Process ◽  
Solar Disinfection ◽  
Helminth Eggs ◽  
Sequential Processes

Sequential helminth egg inactivation using a solar driven advanced oxidation process (AOP) followed by chlorine was achieved. The photo-assisted Fenton process was tested alone under different H2O2 and/or Fe(II) concentrations to assess its ability to inactivate Ascaris suum eggs. The effect of free chlorine alone was also tested. The lowest egg inactivation results were found using Fe(II) or H2O2 separately (5 and 140 mmol L−1, respectively) in dark conditions, which showed about 28% inactivation of helminth eggs. By combining Fe(II) and H2O2 at the same concentrations described earlier, 55% of helminth egg inactivation was achieved. By increasing the reagent's concentration two-fold, 83% egg inactivation was achieved after 120 min of reaction time. Process efficiency was enhanced by solar excitation. Using solar disinfection only, the A. suum eggs inactivation reached was the lowest observed (58% egg inactivation after 120 min (120 kJ L−1)), compared with tests using the photo-Fenton process. The use of the photo-Fenton reaction enhanced the process up to over 99% of egg inactivation after 120 kJ L−1 when the highest Fe(II) and H2O2 concentration was tested. Practically no effect on the helminth eggs was observed with free chlorine alone after 550 mg min L−1 was used. Egg inactivation in the range of 25–30% was obtained for sequential processes (AOP then chlorine) using about 150 mg min L−1.

Sign in / Sign up

Export Citation Format

Share Document