Treatment of H-Acid Wastewater by Photo-Fenton Reagent Combined with a Biotreatment Process: A Study on Optimum Conditions of Pretreatment by a Photo-Fenton Process

2002 ◽  
Vol 69 (3) ◽  
pp. 430-435 ◽  
Author(s):  
Y. Xiao ◽  
G. Wang ◽  
H. Liu ◽  
H. Zhao ◽  
J. Zhang ◽  
...  
Keyword(s):  
Fenton Process ◽  
Optimum Conditions ◽  
Fenton Reagent

Biodegradability of chlorophenol wastewater enhanced by solar photo-Fenton process

2009 ◽  
Vol 59 (5) ◽  
pp. 973-978 ◽  
Author(s):  
W. S. Kuo ◽  
I. T. Lin
Keyword(s):  
Optimum Condition ◽  
Degradation Efficiency ◽  
Solar Irradiation ◽  
Fenton Process ◽  
Optimum Conditions ◽  
Fenton Reagent ◽  
Biological Unit ◽  
Batch Type ◽  
Oxidative State

The combination of solar irradiation and Fenton reagent have been used to enhance the biodegradability (BOD5/COD) of chlorophenol wastewater, including 2-chlorophenol (2-CP), 4-chlorophenol (4-CP), and 2,4-dichlorophenol (2,4-DCP). Results showed that the solar photo-Fenton process improved significantly the biodegradability of chlorophenol wastewater. Basically, increasing initial H2O2 dosage was much more beneficial for increasing biodegradability of wastewater than increasing initial Fe2 +  dosage. Among the conditions studied, the optimum condition of increasing biodegradability of chlorophenol wastewater was found with a [H2O2]0/[Fe2 + ]0/[chlorophenol]0 ratio of 10.0/0.2/1.0, 10.0/0.3/1.0, and 10.0/0.2/1.0 for 2-CP, 4-CP, and 2,4-DCP, respectively. As a result, the value of BOD5/COD was increased from 0 for untreated solution up to 0.231, 0.248, and 0.193 for 2-CP, 4-CP, and 2,4-DCP, respectively with a 15-min treatment. Under the operation of optimum conditions, the oxidative state of chlorophenol wastewater could be easily controlled into a higher biodegradability stage. The COD and TOC degradation efficiency could be in excess of 90% on the whole as the preoxidized chlorophenol solution was treated by a following batch-type biological unit. In the meanwhile, the microtoxicity of wastewater reduced more than 95%.

scholarly journals Application of Fenton reagent and adsorption as advanced treatment processes for removal of Maxilon Red GRL

2017 ◽  
Vol 20 (1) ◽  
pp. 1-6 ◽  
Keyword(s):  
Batch Reactor ◽  
Freundlich Isotherm ◽  
Isotherm Models ◽  
Advanced Treatment ◽  
Fenton Process ◽  
Optimum Conditions ◽  
Fenton Reagent ◽  
Treatment Processes ◽  
Experimental Parameters ◽  
Adsorbent Dose

<p>In this paper, the removal of Maxilon Red GRL by adsorption onto raw soil sample known as Niğde (Bor) grape molasses soil and Fe+2/H2O2 reagent as advanced treatment processes were investigated. The effects of various experimental parameters such as initial Fe+2 and H2O2 concentrations, pH, temperature, contact time, initial adsorbent dose, and initial dye concentration on adsorption and Fenton process efficiencies were studied in a batch reactor. The adsorption experimental data were modeled by Langmuir and Freundlich isotherm models. The data fitted well with the Langmuir isotherm (R2&gt;0.99). The optimum conditions had been determined and found that efficiency of decolorization obtained after 20 min of reaction, was about 99.4% for Fenton process.</p>

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.

The use of steel slags in the heterogeneous Fenton process for decreasing the chemical oxygen demand of oil refinery wastewater

2018 ◽  
Vol 78 (5) ◽  
pp. 1159-1167 ◽  
Author(s):  
Behnam Heidari ◽  
Mohsen Soleimani ◽  
Nourollah Mirghaffari
Keyword(s):  
Microwave Irradiation ◽  
Chemical Oxygen Demand ◽  
Steel Slag ◽  
Oxygen Demand ◽  
Oil Refinery ◽  
Fenton Process ◽  
Refinery Wastewater ◽  
Optimum Conditions ◽  
Heterogeneous Fenton ◽  
Oil Refinery Wastewater

Abstract The Fenton process is a useful and inexpensive type of advanced oxidation process for industrial wastewater treatment. This study was performed with the aim of using the steel slag as a catalyst in the heterogeneous Fenton process in order to reduce the chemical oxygen demand (COD) of oil refinery wastewater. The effects of various parameters including the reaction time (0.5, 1.0, 2.0, 3.0 and 4.0 h), pH (2.0, 3.0, 4.0, 5.0, 6.0 and 7.0), the concentration of steel slag (12.5, 25.0 and 37.5 g/L), and H2O2 concentration (100, 250, 400 and 500 mg/L) on the Fenton process were investigated. Furthermore, the effect of microwave irradiation on the process efficiency was studied by considering the optimum conditions of the mentioned parameters. The results showed that using 25.0 g/L of steel slag and 250 mg/L H2O2, at pH = 3.0, could reduce COD by up to 64% after 2.0 h. Also, microwave irradiation decreased the time of the process from 120 min to 25 min in the optimum conditions, but it consumed a high amount of energy. It could be concluded that steel slags had a high potential in the treatment of oil refinery wastewater through the Fenton process.

scholarly journals The Application of Response Surface Methodology in the Study of Photodegraded Industrial Dairy Effluents by the Photo-Fenton Process: Optimization and Economic Viability

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Carla Cristina Almeida Loures ◽  
Hélcio José Izário Filho ◽  
Ivy dos Santos Oliveira ◽  
Gisella Rossana Lamas Samanamud ◽  
André Luiz de Souza ◽  
...  
Keyword(s):  
Oxygen Demand ◽  
Statistical Design ◽  
Cost Benefit ◽  
Process Efficiency ◽  
Organic Load ◽  
Maximum Efficiency ◽  
Fenton Process ◽  
Fenton Reagent ◽  
Benefit Evaluation ◽  
Dairy Effluents

This study presents results from an application of Photo-Fenton process for organic-load reduction in dairy effluents. Process efficiency was evaluated in terms of percentage dissolved organic carbon, chemical oxygen demand, and biochemical oxygen demand (DOC, COD, and BOD, resp.), whose initial values were 1658±145 mg O2 L−1, 9500±500 mg O2 L−1, and 2400 ± 100 mg O2 L−1, respectively. We applied a statistical design represented by Box-Behnken factorial design inclusive of Fenton's reagent, the power of applied radiation (W), and pH factors. The set temperature value was 30°C with a reaction time of 60 min. The maximum efficiency obtained was at pH=3.5, Fenton reagent in the proportion of 35 g H2O2 + 3.6 g Fe2+, and ultraviolet radiation potency of 28 W. The results obtained for DOC, COD, and BOD were 81%, 90.7%, and 78.8%, respectively. Regarding the cost/benefit evaluation, the variables and their levels should be the following: pH 3.5, 35.0 g H2O2/Fe2+ 3.6 g, and 28 W UV, obtaining a reduction in concentration of 79.5% DOC.

Synergetic Degradation of Enzyme-Fenton Reagent for Methyl Orange

2014 ◽  
Vol 1010-1012 ◽  
pp. 84-87
Author(s):  
Bin Yao ◽  
Zun Mian Xu ◽  
Cheng An Tao ◽  
Jian Fang Wang
Keyword(s):  
Methyl Orange ◽  
Degradation Rate ◽  
Ph Value ◽  
Uv Light ◽  
Degradation Efficiency ◽  
Optimum Conditions ◽  
Fenton Reagent ◽  
Effects Of Ph ◽  
Simulated Wastewater ◽  
Catalytic Effects

The effects of pH adjustment method, pH value, UV light, catalase and Fenton reagent on the degradation efficiency of enzyme-Fenton reagent for methyl orange (MO) were investigated, and the synergetic catalytic effects of catalase and Fenton reagent on the catalytic oxidation for methyl orange were found. When under no UV-light, the enzyme can enhance the degradation efficiency of Fenton reagent. The optimum conditions for degrading methyl orange simulated wastewater whose concentration is 0.1 g/L at room temperature are obtained as follows: the pH is tuned with H2SO4, pH is 3.0, concentration of catalase is 5 μg / mL, concentration of H2O2is 0.01%, concentration of FeSO4is 1.8μmol / L. The degradation rate can reach 98% in 60min. When under UV light at the same condition, the degradation rate can reach 94% in only 15min.

scholarly journals Investigation of optimum conditions and costs estimation for degradation of phenol by solar photo-Fenton process

2014 ◽  
Vol 7 (1) ◽  
pp. 375-382 ◽  
Author(s):  
Mohamed Gar Alalm ◽  
Ahmed Tawfik ◽  
Shinichi Ookawara
Keyword(s):  
Fenton Process ◽  
Optimum Conditions

Enhanced degradation of paracetamol by UV-C supported photo-Fenton process over Fenton oxidation

2011 ◽  
Vol 64 (12) ◽  
pp. 2433-2438 ◽  
Author(s):  
B. Manu ◽  
S. Mahamood
Keyword(s):  
Oxygen Demand ◽  
Cod Removal ◽  
Fenton Oxidation ◽  
Fenton Process ◽  
Objective Functions ◽  
Optimum Conditions ◽  
Experimental Conditions ◽  
Paracetamol Concentration ◽  
Fenton Oxidation Process ◽  
Uv C

For the treatment of paracetamol in water, the UV-C Fenton oxidation process and classic Fenton oxidation have been found to be the most effective. Paracetamol reduction and chemical oxygen demand (COD) removal are measured as the objective functions to be maximized. The experimental conditions of the degradation of paracetamol are optimized by the Fenton process. Influent pH 3, initial H2O2 dosage 60 mg/L, [H2O2]/[Fe2+] ratio 60 : 1 are the optimum conditions observed for 20 mg/L initial paracetamol concentration. At the optimum conditions, for 20 mg/L of initial paracetamol concentration, 82% paracetamol reduction and 68% COD removal by Fenton oxidation, and 91% paracetamol reduction and 82% COD removal by UV-C Fenton process are observed in a 120 min reaction time. By HPLC analysis, 100% removal of paracetamol is observed at the above optimum conditions for the Fenton process in 240 min and for the UV-C photo-Fenton process in 120 min. The methods are effective and they may be used in the paracetamol industry.

Decolorization of Basic Turquise Blue X-GB and Basic Blue X-GRRL by the Fenton’s Process and its Kinetics

2019 ◽  
Vol 233 (3) ◽  
pp. 361-373 ◽  
Author(s):  
Naeem-Ul-Haq Khan ◽  
Haq Nawaz Bhatti ◽  
Munawar Iqbal ◽  
Arif Nazir
Keyword(s):  
Waste Water ◽  
Water Pollution ◽  
Oxidation Process ◽  
Human Life ◽  
Correlation Coefficients ◽  
Fenton Process ◽  
Optimum Conditions ◽  
Oxidation Treatment ◽  
Textile Industries ◽  
Life On Earth

Abstract Textile industries use dyes to color their products and release waste water containing dyes, causing water pollution which is a serious problem for survival of human life on earth. The decolorization of basic turquise blue X-GB (BTB X-GB) 250% and basic blue X-GRRL (BB X GRRL) 250% dyes was examined by advanced (Fenton process) oxidation process. The effects of different parameters (initial dye concentration, pH, concentrations of hydrogen peroxide (H2O2) and reaction time) have been examined and optimum conditions were determined. It has been noted that percentage decolorization of both dyes (50 mg/L) increases with increase in concentration of H2O2. At optimum conditions (pH=3.0, H2O2=4.8 mM, temperature=50°C, time=80 min of BTB X-GB, and pH=5.0, H2O2=5.6 mM, temperature=40°C, time=60 min of BB X-GRRL) the decolorization obtained by Fenton process was 85.83% of BTB X-GB and 74.98% for BB X-GRRL. 1st order, 2nd order and BMG kinetic models were used to analyze the data. BMG model gives us the higher values of correlation coefficients for all data. Results showed that Fe2+/H2O2 are most effective for oxidation treatment of waste water effluents containing dyes as main pollutants.

Study of Degradation of Phenol by Fenton Reagent under Sunlight

2012 ◽  
Vol 610-613 ◽  
pp. 1364-1367
Author(s):  
Sheng Tao Jiang ◽  
Xiao Chen ◽  
Wei Su ◽  
Tian Fei Tang
Keyword(s):  
Visible Light ◽  
Ph Value ◽  
Phenol Degradation ◽  
Inhibitory Effect ◽  
Sodium Oxalate ◽  
Optimum Conditions ◽  
Fenton Reagent ◽  
Initial Phenol Concentration ◽  
High Concentrations ◽  
Phenol Wastewater

Degradation of phenol was studied in the presence of Fenton Reagent. The initial concentrations of C2O42, H2O2 , Fe2 + and pH value on the reaction were investigated. The optimum conditions to degrade phenol from water were determined when initial phenol concentration was 500mg/L, the concentration of Na2C2O4, H2O2 and Fe2 + were 0mmol/L, 300mg/L and 60mg/ L respectively, and pH value was 3. Under the optimum conditions, phenol degradation and mineralization rates could reach 80% and 50%, respectively when the degrade time lasted 10 min.Reference to other literature of sodium oxalate to join can effectively improve the utilization of the ultraviolet and visible light,thus enhancing the effect of high concentrations of phenol wastewater removal, but this experiment reflects the high C2O42- will play an inhibitory effect .

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