scholarly journals COD Removal of Edible Oil Content in Wastewater by Advanced Oxidation Process

2016 ◽  
Vol 6 (2) ◽  
pp. 57 ◽  
Author(s):  
Aola Hussein Flamarz Tahir ◽  
Nagam Obeid Kariem ◽  
Shatha Abduljabbar Ibrahim
Keyword(s):  
Advanced Oxidation Process ◽  
Ph Value ◽  
Advanced Oxidation ◽  
Fenton Process ◽  
Cod Reduction ◽  
Chemical Reagents ◽  
Batch System ◽  
Oil Concentration ◽  
Optimum Chemical ◽  
Total Reaction Time

Different Advanced Oxidation Processes (Photo Fenton process, Fenton process and H<sub>2</sub>O<sub>2</sub>/UV) were studied in order to reduce COD from oily compounds aqueous solution using batch system. To get the optimum condition, different variables were studied for each of these processes; such as pH, time, concentration of H<sub>2</sub>O<sub>2</sub>, concentration of oil, concentration of FeSO<sub>4</sub>·7H<sub>2</sub>O and temperature as parameters. It was found that the optimal pH value for the three processes was 3 and the optimal temperature was 30<sup>o</sup>C for Photo-Fenton and UV/H<sub>2</sub>O<sub>2</sub> system and 20<sup>o</sup>C for Fenton process. Photo-Fenton process gave a maximum COD reduction of 80.59 % (COD from 2684 to 521 mg/l), Fenton gave 53.22 % (COD from 2587-1130) and the combination of UV/H<sub>2</sub>O<sub>2</sub> gave a COD reduction of 22.69 % (COD from 2450 to 1894). The percentage of removal found was after the total reaction time (180 min.). The optimum chemical reagents for Photo-Fenton, Fenton and UV/H<sub>2</sub>O<sub>2</sub> were as the following H<sub>2</sub>O<sub>2</sub> = 800 mg/l, 1500 mg/l and 2000 mg/l, Fe<sub>2</sub>SO<sub>4</sub>·7H<sub>2</sub>O = 60 mg/l, 100 mg/l.

Optimum and Efficiency of Chloramphenicol Degradation by UV/H2O2 Process

2013 ◽  
Vol 838-841 ◽  
pp. 2677-2680 ◽  
Author(s):  
Yan Bo Li ◽  
Cui Ping Wang ◽  
Ming Yue Zheng ◽  
Kai Jun Wang
Keyword(s):  
Reaction Time ◽  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Ph Value ◽  
Advanced Oxidation ◽  
Degradation Efficiency ◽  
Complete Degradation ◽  
Initial Ph ◽  
Operation Parameters

Degradation of chloramphenicol (CAP) by an advanced oxidation process, UV/H2O2, was investigated. Firstly, effect of H2O2 concentration, initial pH value, K2S2O8 concentration and reaction time on chloramphenicol degradation by UV/H2O2 process was studied. In addition, all the operation parameters mentioned above were optimized. The results showed that the degradation efficiency of CAP can be obviously enhanced with increasing both H2O2 concentration and K2S2O8 concentration. Moreover, initial pH value had unapparent impact on the efficiency of chloramphenicol degradation. Nearly complete degradation of chloramphenicol was achieved under the conditions of H2O2 concentration 2mM, initial pH value 7.7, K2S2O8 concentration 1mM and reaction time 15min.

Remediation of Water Contaminated with Pesticides by Indirect Electrochemical Oxidation Process Electro-Fenton

2008 ◽  
Vol 11 (2) ◽  
Author(s):  
Aida Kesraoui Abdessalem ◽  
Nihal Oturan ◽  
Nizar Bellakhal ◽  
Mohamed Dachraoui ◽  
Mehmet A. Oturan
Keyword(s):  
Aqueous Solutions ◽  
Hydroxyl Radical ◽  
Electrochemical Oxidation ◽  
Acidic Medium ◽  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Advanced Oxidation ◽  
Fenton Process ◽  
Carbon Felt ◽  
Platinum Anode

AbstractThe mineralization of pesticides chlortoluron, carbofuran and bentazone aqueous solutions in acidic medium of pH 3 was studied by electro-Fenton process using a carbon felt cathode and a platinum anode. This advanced oxidation process allows the formation of hydroxyl radical (

scholarly journals OPTIMIZATION OF SIMAFIX RED DYE DECOLORIZATION BY USING ADVANCED OXIDATION PROCESS: PHOTO-FENTON

2018 ◽  
Vol 54 (4B) ◽  
pp. 64
Author(s):  
Nga Thi Dinh
Keyword(s):  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Ph Value ◽  
Batch Reactor ◽  
Textile Wastewater ◽  
Dye Decolorization ◽  
Fenton Process ◽  
Removal Efficiencies ◽  
Textile Wastewater Treatment ◽  
Red Dye

This study investigated the Photo-Fenton process in textile wastewater treatment by using textile synthesis wastewater made of Symafix Red Dye solution. The aim of the study was to investegate the factors that influent to the photo-Fenton process such as contact time, pH, H2O2 and Fe2+conectrations, and UVexposure in order to research the optimum values of this process.Treatment of textile wastewater was carried out at ambient temperature in a batch reactor. As a result, the second-order is suitable for the reaction of removing color by using Photo –Fenton processes. The removal efficiencies decreased when we increased the concentration of Fe2+ from 7.162 mM to 14.162 mM. When we increased the H2O2 concentration from 0.037 mM to 0.11mM, the removal efficiencies slightly decreased. The optimum value of pH is pH = 3. At the optimum of pH value and minimum the concentration of Fe2+ and H2O2 the removal efficiency could reach up to 95.82 %. 

scholarly journals Hybrid advanced oxidation process (HAOP) as an effective pharmaceutical wastewater treatment

2019 ◽  
Vol 125 ◽  
pp. 03007 ◽  
Author(s):  
Aris Mukimin ◽  
Hanny Vistanty
Keyword(s):  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Ph Value ◽  
Advanced Oxidation ◽  
Carbon Cloth ◽  
Pharmaceutical Wastewater ◽  
Excellent Performance ◽  
Toxic Compounds ◽  
Oxidation Reduction ◽  
Low Efficiency

Pharmaceutical wastewater may contain bio-refractory and toxic compounds that cannot be treated by microbiology methods. In addition to low efficiency, bacteria will be collapsed and biomass wash-out will occur and be detected as TSS. Hybrid advanced oxidation process (HAOP), based on the electrochemical method, is highly potential for degradation of stable compounds. Cylinder cathode made of carbon cloth was paired with Ti/PtIr anode and inter-electrode distance of 1-3 cm. The cell was equipped with a magnetic stirrer to improve the oxidation-reduction on the surface of the electrode thus enhancing contact between pollutant and generated oxidator. Applied at electrolyte of 4000 mg/L, ferrous sulfate of 0.2 mM, and pH value of 2.5, HAOP showed an excellent performance and reached 60%, 90%, and 94% of COD reduction after 3, 6, and 9 hrs.

scholarly journals Toxicity Reduction of Reactive Red Dye-238 Using Advanced Oxidation Process by Solar Energy

2017 ◽  
Vol 14 (3) ◽  
pp. 516-523
Author(s):  
Baghdad Science Journal
Keyword(s):  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Ph Value ◽  
Advanced Oxidation ◽  
Treatment Method ◽  
Synthetic Wastewater ◽  
H2o2 Concentration ◽  
Efficient Treatment ◽  
Toxicity Reduction ◽  
Red Dye

Decolorization of red azo dye (Cibacron Red FN-R) from synthetic wastewater has been investigated as a function of solar advanced oxidation process. The photocatalytic activity using ZnO as a photocatalysis has been estimated. Different parameters affected the removal efficiency, including pH of the solution, initial dye concentration and H2O2 concentration were evaluated to find out the optimum value of these parameters. The results proved that the optimal pH value was 8 and the most efficient H2O2 concentration was 100mg/L. Toxicity reduction percent for effluent solution was also monitored to assess the degradation process. This treatment method was able to strongly reduce the color and toxicity of reactive red dye-238 to about (99 and 80) % respectively. It can be concluded, from these experiments, that the using of ZnO as a photocatalysis was exhibited as economical and efficient treatment method to remove reactive red dye-238 from aqueous solution.

scholarly journals CORN OIL REMOVAL BY ADVANCED OXIDATION PROCESSES IN COMPARTION WITH CASTOR AND COCONUT OILS

2021 ◽  
Vol 25 (Special) ◽  
pp. 3-123-3-129
Author(s):  
Nada S. Joodi ◽  
◽  
Nagam O. Kariem ◽  
Keyword(s):  
Vegetable Oils ◽  
Castor Oil ◽  
Corn Oil ◽  
Coconut Oil ◽  
Advanced Oxidation ◽  
Fenton Process ◽  
Medium Ph ◽  
Mixing Speed ◽  
Oil Concentration ◽  
Removal Efficiencies

The AOPs advanced oxidation process has been studied in three ways: (UV/H₂O₂), Fenton, and Photo-Fenton in artificial water treating from vegetable oils. The corn, castor, and coconut oils emulsion were prepared and treated by AOPs. Several variables were studied: time, pH, mixing speed, temperature, the dose of chemicals (H₂O₂ & Fe2SO4.7H2O), and finally the oil concentration. The best conditions were obtained in several experiments where the Fenton and Photo-Fenton process operates in an acidic medium (pH = 3.5), while the UV/H₂O₂ process operates with the neutral medium (pH = 7). The optimum temperature for the Photo-Fenton and UV/H₂O₂ processes is 40°C, and for the Fenton process is 20°C. While there was an effect of mixing speed, higher efficiency was achieved at (1000 rpm) for the Photo-Fenton process and (500 rpm) for the Fenton and UV/H₂O₂ processes. Also, the H₂O₂ concentration was at (500 mg/L) for all processes, when the Fe2SO4.7H2O concentration for the photo-Fenton process = (50 mg/L), and for the Fenton process = (250 mg/L). Oil concentration = (1750 mg/L). Optimum conditions were applied to treat vegetable oils, the Fenton process gave a maximum removal efficiency of 95.2% for corn oil (COD 12800 to 610 mg/L), 94.5% for castor oil, while 57.5% for coconut oil after the total reaction time (180 minutes). The Photo-Fenton process gave removal efficiencies: 93% for corn oil (COD 12500 to 870 mg/L), 83.8% for castor oil, and 61.6% for coconut oil. The UV/H₂O₂ process gave removal efficiencies: 69.8% for corn oil, 32% for castor oil, and 23.4% for coconut oil after the total irradiation time. As real wastewater, the treatment was acceptable and achieved an efficiency of 44.7%, 89.2%, and 83.8% for the UV/H₂O₂, Fenton, and Photo-Fenton processes, respectively.

The use of radiation-induced advanced oxidation for water reclamation

1996 ◽  
Vol 34 (7-8) ◽  
pp. 343-349 ◽  
Author(s):  
Peter Gehringer ◽  
Helmut Eschweiler
Keyword(s):  
Electron Beam ◽  
Free Radical ◽  
Groundwater Remediation ◽  
Advanced Oxidation Process ◽  
Ph Value ◽  
Advanced Oxidation ◽  
Water Reclamation ◽  
Radiation Induced ◽  
Radical Generation ◽  
The Impact

An advanced oxidation process (AOP) for water reclamation, particularly groundwater remediation is described. It is based on a combination of ozone and electron beam irradiation. Main pathways of the hydroxy free radical generation in such a combination are reviewed and compared with those of other AOPs. New data is presented regarding the effect of the direct introduction of gaseous ozone into the irradiation chamber on pollutant decomposition, and the impact of the pH value on OH free radical production. Special attention is paid to an assessment of the combined ozone/electron beam process in comparison to other AOPs.

Study on the Degradation of Plasticizer Di (2-Ethylhexyl) Phthalate by Advanced Oxidation Process

2012 ◽  
Vol 529 ◽  
pp. 463-467
Author(s):  
Yang Yang ◽  
Zhi Wen Lin
Keyword(s):  
Ozone Concentration ◽  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Ph Value ◽  
Removal Rate ◽  
Advanced Oxidation ◽  
Experimental Results ◽  
Initial Ph ◽  
Ethylhexyl Phthalate

Di-(2-ethylhexyl) phthalate (DEHP) is one of the most common plasticizers, it have a wide variety of industrial, agricultural and domestic applications. The degradation characteristics of DEHP in water by the advanced oxidation process O3, UV and UV/O3 were respectively studied. The effects of ozone concentration, DEHP concentration and pH on the removal rate of DEHP were investigated. The experimental results showed that UV was not able to remove DEHP significantly. However, O3 or the combination of O3 with UV could degrade DEHP effectively. Both the increase in the O3 concentration and the initial pH value of the system benefited the DEHP removal.

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