scholarly journals Performance of different photocatalytic oxidation processes in petroleum wastewater treatment: A Comparative Study

2017 ◽  
Vol 19 (1) ◽  
pp. 167-175 ◽  
Keyword(s):  
Wastewater Treatment ◽  
Photocatalytic Oxidation ◽  
Oxygen Demand ◽  
Fenton Process ◽  
Oxidation Processes ◽  
Alkaline Conditions ◽  
Acidic Conditions ◽  
Main Factors ◽  
Neutral Conditions ◽  
Photocatalytic Processes

<p>The present study was conducted to compare the performance of different solar photocatalytic processes (TiO<sub>2</sub> photocatalysis, photo-Fenton, photo-Fenton coupled with TiO<sub>2</sub> photocatalysis, and photo-Fenton coupled with TiO<sub>2</sub>/ZnO photocatalysis) for the treatment of petroleum wastewater. The removal efficiency of chemical oxygen demand (COD) is evaluated. TiO<sub>2</sub> dosage and pH are the main factors that improve the COD removal in the TiO<sub>2</sub> photocatalysis process while Fe<sup>+2</sup> and H<sub>2</sub>O<sub>2</sub> concentration are the main factors in photo-Fenton process. The photo-Fenton coupled with TiO<sub>2</sub>/ZnO photocatalysis is the most efficient process for treatment of petroleum wastewater at the neutral conditions (pH 7). Therefore, no need to adjust pH during this treatment. In acidic conditions (pH&lt;7), the photo-Fenton process is more efficient than the TiO<sub>2</sub> photocatalysis process while it is less efficient than the TiO<sub>2</sub> photocatalysis process in alkaline conditions (pH&gt;7).</p>

scholarly journals Comparative Study of Advanced Oxidation Processes to Treat Petroleum Wastewater

2015 ◽  
Vol 43 (2) ◽  
pp. 97-101 ◽  
Author(s):  
Dheeaa Al Deen Atallah Aljubourya ◽  
Puganeshwary Palaniandy ◽  
Hamidi Bin Abdul Aziz ◽  
Shaik Feroz
Keyword(s):  
Fenton Reaction ◽  
Oxygen Demand ◽  
Oil Refinery ◽  
Fenton Process ◽  
Key Factors ◽  
Solar Photocatalysis ◽  
Oxidation Processes ◽  
Alkaline Conditions ◽  
Acidic Conditions ◽  
Central Composite

AbstractThis study was carried out to compare the performance of different oxidation processes, such as solar photo-Fenton reaction, solar photocatalysis by TiO2, and the combination of the two for the treatment of petroleum wastewater from Sohar Oil Refinery by a central composite design with response surface methodology. The degradation efficiency was evaluated in terms of chemical oxygen demand (COD) and total organic carbon (TOC) reductions. Solar photocatalysis by the TiO2/Fenton method improved the performance of the photocatalyst at neutral pH for petroleum wastewater without the need to adjust the pH during this treatment. Under acidic conditions, the solar photo-Fenton process is more efficient than solar TiO2photocatalysis while it is less efficient under alkaline conditions. The TiO2dosage and pH are the two main factors that improved the TOC and COD reductions in the solar photocatalysis using combined TiO2/Fenton and the solar TiO2photocatalysis processes while the pH and H2O2concentration are the two key factors that affect the solar photo-Fenton process.

scholarly journals Degradation of Total organic carbon (TOC) and Chemical oxygen demand (COD) in Petroleum wastewater by solar Photo-Fenton process.

2017 ◽  
Vol 19 (3) ◽  
pp. 430-438 ◽  
Keyword(s):  
Free Energy ◽  
Wastewater Treatment ◽  
Reaction Time ◽  
Oxygen Demand ◽  
Operating Conditions ◽  
Oil Refinery ◽  
Fenton Process ◽  
Optimum Conditions ◽  
Fenton Reagent ◽  
Acidic Conditions

The aim of this study is to investigate the performance of solar photo-Fenton process (H2O2/Fe2+/Solar) to treat petroleum wastewater from Sohar oil Refinery, Oman. The effect of operating conditions such as pH, reaction time, Fenton ratio, and Fenton reagent concentrations are investigated. The obtained optimum conditions include H2O2 dosage (1 g L-1), Fe+2 dosage (0.08 g L-1), pH (3) and reaction time (180 min). TOC and COD removal rates are 64 % and 78 %, respectively. However, the photolytic process was less efficient in the petroleum wastewater treatment, achieving an 11.5% and 9% of COD and TOC removals, respectively. The solar photo-Fenton process has well efficient for petroleum wastewater treatment in the acidic conditions and more economic by free energy.

scholarly journals Electro-Fenton for Industrial Wastewater Treatment: A Review

2019 ◽  
Vol 125 ◽  
pp. 03003
Author(s):  
Elin Marlina ◽  
Purwanto
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Advanced Oxidation Processes ◽  
Pollutant Removal ◽  
Operating Parameters ◽  
Fenton Process ◽  
Phenol Compounds ◽  
Oxidation Processes ◽  
Electrochemical Advanced Oxidation Processes ◽  
Recent Developments

Electro-Fenton is part of electrochemical advanced oxidation processes (EAOPs) which have been widely used to treat various types of waste such as color, drugs, phenol compounds, leachate, surfactants, and others. This article focuses on the effects of various operating parameters and recent developments in the electro-Fenton process, and then their optimum ranges for maximum pollutant removal and various pollutants removed by this process is observed.

scholarly journals Removal of COD from Oil Recovery Industry Wastewater by the Advanced Oxidation Processes(AOP) Based on H2O2

2013 ◽  
Vol 10 (1) ◽  
pp. 31-38 ◽  
Keyword(s):  
Reaction Time ◽  
Oil Recovery ◽  
Oxygen Demand ◽  
Cod Removal ◽  
Fenton Process ◽  
Oil And Grease ◽  
Cod Reduction ◽  
Oxidation Processes ◽  
High Pollution ◽  
Industry Wastewater

The combinations of H2O2/Fe+2, UV/H2O2/Fe+2 and UV/H2O2 process were investigated on treatment of oil recovery industry wastewater. Treatment of oil recovery industry wastewater, a typical high pollution strength industrial wastewater (chemical oxygen deman (COD): 21000 mg l-1, biological oxygen demand (BOD): 8000 mg l-1, oil and grease:1140 mg l-1, total dissolved solids (TDS): 37000 mg l-1, total suspended solids: 2580 mg l-1), was carried out by batch oxidation processes. The optimal mass ratio for H2O2/Fe+2 yielding the highest COD removal was found to be 8.658 corresponding to 200.52 g 1-1 H2O2 and 23.16 g l-1 Fe+2 concentrations for 60 minutes reaction time. Fenton process gave a maximum COD reduction of 86% (from 21000 to 2980 mg l-1) and the combination of UV/H2O2 gave a COD reduction of 39% (from 21000 to 12730). The percentage of removal, after the total reaction time (3.5h), H2O2: 8.4 g l-1 and Fe+2: 0.05g l-1, in the photo Fenton process, corresponded to 81 % of the total initial COD (4200 mg l-1). The oxidative ability of the UV/Fe+2/H2O2 process (81%) was greater than that of the UV/H2O2 process (55%) for 80% diluted wastewater. COD removal efficiency for UV/H2O2 process (COD/H2O2=1/2 (w/w)) was 90%, 55%, and 39 when initial COD was 1050, 4200, and 21000 mg l-1, respectively, whereas COD removal was 943, 2320, and 8270 mg l-1, respectively.

scholarly journals Performance of Two-Chambered Microbial Fuel Cell (MFC) at Different pH Anode Microenvironment Using Palm Oil Mill Effluent (POME) as Substrate

2015 ◽  
Vol 773-774 ◽  
pp. 511-519
Author(s):  
Aina Mardhiyah Jalilluddin ◽  
Tay Chia-Chay ◽  
Suhaimi Abdul-Talib
Keyword(s):  
Wastewater Treatment ◽  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Oxygen Demand ◽  
Batch Experiments ◽  
Batch Mode ◽  
Higher Power ◽  
Alkaline Conditions ◽  
Palm Oil Mill ◽  
Pome Wastewater

Microbial fuel cell (MFC) represents a new method for producing electricity from the oxidation of organic matter. In addition, MFC offers an effective wastewater treatment. The feasibility of using POME wastewater as a substrate was investigated through a two-chambered MFC operated in batch mode for 12 days. The performance of MFC was evaluated under three different anode pH microenvironments of acidic (pH 4), neutral (pH 7) and alkaline (pH 8). Results of experiments indicated that the MFC reactor was able to generate electricity and treat POME wastewater that acted as substrate for MFC. The performance of MFC was found to be dependent on the anode pH microenvironments. Higher power density was observed at neutral condition compared to acidic and alkaline conditions. Furthermore, significant reductions in chemical oxygen demand (COD) in anode chambers were found due to the changes of pH in anode microenvironment. This indicated that effective wastewater treatment of POME in MFC batch experiments. In conclusion, MFC provides an alternative, sustainability and effective method to generate electricity and effectively treat wastewater.

Olive Oil Mill Wastewater Treatment by the Electro-Fenton Process

2006 ◽  
Vol 3 (5) ◽  
pp. 345 ◽  
Author(s):  
Nizar Bellakhal ◽  
Mehmet A. Oturan ◽  
Nihal Oturan ◽  
Mohamed Dachraoui
Keyword(s):  
Wastewater Treatment ◽  
Olive Oil ◽  
Model Compound ◽  
Oxidation Process ◽  
Oxygen Demand ◽  
Fenton Process ◽  
Colour Intensity ◽  
Olive Oil Mill Wastewater ◽  
Chemical Reagents ◽  
Mediterranean Countries

Environmental Context. The combination of the Fenton’s reagent with electrochemistry (the electro-Fenton process) represents an efficient method for wastewater treatment. This study describes the use of this process to clean olive oil mill wastewater, which is a real environmental problem in Mediterranean countries. Contrary to the conventional methods which reduce the pollution by removing the pollutants from the wastewater, the electro-Fenton process is shown to fully destroy (mineralize) olive oil mill wastes in water without previous extraction and without addition of chemical reagents. Abstract. Treatment of olive oil mill wastewater is one of the most important environmental problems for Mediterranean countries. This wastewater contains many organic compounds like polyphenols, which are very difficult to treat by classical techniques. An advanced electrochemical oxidation process, the electro-Fenton process, has been used as a way of removing chemical oxygen demand and colour intensity from olive oil mill wastewater. Vanillic acid, which has been selected as a model compound, and olive oil mill wastewater have been completely mineralized by the electro-Fenton process with a carbon felt cathode, using Fe2+ ions as the catalyst.

scholarly journals Photo-fenton remediation of wastewaters containing agrochemicals

2005 ◽  
Vol 48 (spe) ◽  
pp. 207-218 ◽  
Author(s):  
Antonio Carlos Silva Costa Teixeira ◽  
Lucas Mendes ◽  
Giselle Stollar ◽  
Roberto Guardani ◽  
Cláudio Augusto Oller do Nascimento
Keyword(s):  
Advanced Oxidation Processes ◽  
Low Cost ◽  
Oxygen Demand ◽  
Solar Irradiation ◽  
Treated Wastewater ◽  
Commercial Application ◽  
Photochemical Degradation ◽  
Fenton Process ◽  
Experimental Conditions ◽  
Oxidation Processes

The photochemical degradation of agrochemicals in aqueous solution by means of advanced oxidation processes (AOPs) was studied. The photo-Fenton process was evaluated in terms of the time evolution of dissolved organic carbon (COD) and chemical oxygen demand (DOC), their total removals, and increase in biodegradability of treated wastewater. Under the experimental conditions studied, the process showed to be superior to other AOPs, at any Fe(II) and H2O2 concentrations. The results pointed towards the use of solar irradiation and low cost commercial application.

Dyeing of multiple types of fabrics with a single reactive azo disperse dye

2014 ◽  
Vol 68 (3) ◽  
Author(s):  
Wei Zhang ◽  
Cheng Wu
Keyword(s):  
Sodium Sulphate ◽  
Ammonium Cation ◽  
Disperse Dyes ◽  
Disperse Dye ◽  
Alkaline Conditions ◽  
Acidic Conditions ◽  
Azo Disperse Dyes ◽  
Acrylic Fabric ◽  
Dyed Fabrics ◽  
Neutral Conditions

AbstractThree novel reactive azo disperse dyes were prepared using 7-acetamide-4-hydroxy-2-naphthalene sodium sulphate as the precursor. The structure of the dyes has the combined characteristics of reactive, disperse, and cationic dyes. Under alkaline conditions (pH 9), the dyes can be applied to cotton, silk, wool, and nylon. Under neutral conditions, they can be used to dye polyester. Under acidic conditions (pH 4.5), they can colour acrylic fabric after conversion of the tertiary amine group to the quaternary ammonium cation. The colour-fastness of the dyed fabrics were also evaluated.

Advanced oxidation processes with coke plant wastewater treatment

2014 ◽  
Vol 69 (9) ◽  
pp. 1875-1878 ◽  
Author(s):  
A. Krzywicka ◽  
A. Kwarciak-Kozłowska
Keyword(s):  
Wastewater Treatment ◽  
Fenton Reaction ◽  
Advanced Oxidation Processes ◽  
Coke Plant ◽  
Advanced Oxidation ◽  
Fenton Process ◽  
Oxidation Processes ◽  
Coke Wastewater ◽  
Removal Of Impurities ◽  
Coke Plant Wastewater

The aim of this study was to determine the most efficient method of coke wastewater treatment. This research examined two processes – advanced oxidation with Fenton and photo-Fenton reaction. It was observed that the use of ultraviolet radiation with Fenton process had a better result in removal of impurities.

EFFECTS OF TANNINS ON SPORE GERMINATION AND GROWTH OF FUSARIUM SOLANI f. PHASEOLI AND VERTICILLIUM ALBO-ATRUM

1967 ◽  
Vol 13 (12) ◽  
pp. 1655-1661 ◽  
Author(s):  
J. A. Lewis ◽  
G. C. Papavizas
Keyword(s):  
Spore Germination ◽  
Fusarium Solani ◽  
Mycelial Growth ◽  
Complete Medium ◽  
Tannin Concentration ◽  
Alkaline Conditions ◽  
Acidic Conditions ◽  
Neutral Conditions ◽  
Verticillium Albo Atrum

Gallotannin, wattle, canaigre, and chestnut tannins in a complete medium affected in vitro spore germination and mycelial growth of Fusarium solani f. phaseoli and Verticillium albo-atrum. The pH values and tannin concentration were important factors determining the effectiveness of tannins as inhibitors. Under acidic conditions (pH 5), gallotannin, canaigre, and chestnut tannins at concentrations varying from 39 p.p.m. to 625 p.p.m. inhibited spore germination of both fungi. At a concentration of 1000 p.p.m. these tannins completely prevented growth at pH 5 of both fungi during a 20-day period. Under near neutral conditions (pH 6–7) there was a minimum inhibition of spore germination and mycelial growth with all tannins tested. Under alkaline conditions (pH 8) there was some degree of inhibition of spore germination, but, in general, growth was similar to that under neutral conditions. Wattle tannin was unusual in that it did not prevent growth of either fungus under acidic conditions although the growth of V. albo-atrum was appreciably reduced compared with the control. Gallotannin, however, prevented growth of both fungi under alkaline as well as acidic conditions.

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