Treatment of Sodium Formate Wastewater by Fenton Oxidation Process

2012 ◽  
Vol 573-574 ◽  
pp. 627-630
Author(s):  
Zhi Gang Chen ◽  
Rui Xue Zhang ◽  
Bo Zhang ◽  
An Ping Wei
Keyword(s):  
Reaction Time ◽  
Removal Efficiency ◽  
Oxidation Process ◽  
Ph Value ◽  
Sodium Formate ◽  
Cod Removal ◽  
Fenton Oxidation ◽  
Fenton Process ◽  
Initial Ph ◽  
Fenton Oxidation Process

In this study, in order to reduce the sodium formate concentration thereby reducing toxicity, the treatment of this wastewater by Fenton process was investigated. The effects of initial PH value, reaction time, concentration of FeSO4• 7H2O, and H2O2 dosage on the removal efficiency of COD were studied respectively. The experiment results show that when using Fenton oxidization pretreatment process, with pH 2.0, FeSO4•7H2O concentration 4000mg/L, H2O2(30 % ) portion 4ml/L, and reaction time 20min, COD removal efficiency was more than 50%, oxidization efficiency was good.

Treatment of Pharmaceutical Wastewater by Micro-Electrolysis and Fenton Oxidation Process

2011 ◽  
Vol 356-360 ◽  
pp. 1622-1625 ◽  
Author(s):  
Chong Hao Huang ◽  
Meng Xing Cao ◽  
Jun Hong Luo ◽  
Chao Zhang
Keyword(s):  
Reaction Time ◽  
Oxidation Process ◽  
Ph Value ◽  
Oxygen Demand ◽  
Operating Conditions ◽  
Fenton Process ◽  
Mass Ratio ◽  
Pharmaceutical Wastewater ◽  
Initial Ph ◽  
Fenton Oxidation Process

Pharmaceutical wastewater was treated by micro-electrolysis and Fenton process.The aim of this research was to optimize operating parameters in micro-electrolysis and Fenton process. Effectiveness of important process parameters such as mass ratio of iron to carbon, the initial pH, reaction time and H2O2 dosage on the performance of micro-electrolysis and Fenton process were investigated. The results show that the removal efficiency of pharmaceutical wastewater chemical oxygen demand (COD) could reach 37.3% at the optimal pH of 4 with the iron to carbon ratio of 1:1 after 80 min treatment. The operating conditions of Fenton process are 0.5% of H2O2 dosage, the pH value of 4 and the reaction time of 180 min. The pharmaceutical wastewater COD removal could reach 79.4%.

Study on Pretreatment of Dye Wastewater by Fenton Oxidation Process

2012 ◽  
Vol 627 ◽  
pp. 378-381
Author(s):  
Bi Rong Wang
Keyword(s):  
Reaction Time ◽  
Oxidation Process ◽  
Removal Rate ◽  
Fenton Oxidation ◽  
Dye Wastewater ◽  
Dyeing Wastewater ◽  
Reaction Conditions ◽  
Fenton Oxidation Process

Fenton pretreatment has been used for treating dye wastewater. The effects of the dos of H2O2 and FeSO4, reaction time and pH on the removal COD were investigated. It was found that, when the reaction conditions are as follows: COD 2850 mg/L dyeing wastewater, the dosage of H2O2 is 140mmol/L, FeSO4 17.02 mmol/L, pH 7.6, and reaction time 1.0 h, the CODcr of dye wastewater removal rate of up to 70%. Fenton pretreatment process of dye wastewater has a broad prospect.

scholarly journals Treatment of oilfield wastewater by combined process of micro-electrolysis, Fenton oxidation and coagulation

2017 ◽  
Vol 76 (12) ◽  
pp. 3278-3288 ◽  
Author(s):  
Zhenchao Zhang
Keyword(s):  
Reaction Time ◽  
Removal Efficiency ◽  
Treatment Process ◽  
Cod Removal ◽  
Fenton Oxidation ◽  
Oily Wastewater ◽  
Optimum Conditions ◽  
Combined Process ◽  
Cod Removal Efficiency ◽  
Optimized Conditions

Abstract In this study, a combined process was developed that included micro-electrolysis, Fenton oxidation and coagulation to treat oilfield fracturing wastewater. Micro-electrolysis and Fenton oxidation were applied to reduce chemical oxygen demand (COD) organic load and to enhance organic components gradability, respectively. Orthogonal experiment were employed to investigate the influence factors of micro-electrolysis and Fenton oxidation on COD removal efficiency. For micro-electrolysis, the optimum conditions were: pH, 3; iron-carbon dosage, 50 mg/L; mass ratio of iron-carbon, 2:3; reaction time, 60 min. For Fenton oxidation, a total reaction time of 90 min, a H2O2 dosage of 12 mg/L, with a H2O2/Fe2+ mole ratio of 30, pH of 3 were selected to achieve optimum oxidation. The optimum conditions in coagulation process: pH, cationic polyacrylamide dosage, mixing speed and time is 4.3, 2 mg/L, 150 rpm and 30 s, respectively. In the continuous treatment process under optimized conditions, the COD of oily wastewater fell 56.95%, 46.23%, 30.67%, respectively, from last stage and the total COD removal efficiency reached 83.94% (from 4,314 to 693 mg/L). In the overall treatment process under optimized conditions, the COD of oily wastewater was reduced from 4,314 to 637 mg/L, and the COD removal efficiency reached 85.23%. The contribution of each stage is 68.45% (micro-electrolysis), 24.07% (Fenton oxidation), 7.48% (coagulation), respectively. Micro-electrolysis is the uppermost influencing process on COD removal. Compared with the COD removal efficiency of three processes on raw wastewater under optimized conditions: the COD removal efficiency of single micro-electrolysis, single Fenton oxidation, single coagulation is 58.34%, 44.88% and 39.72%, respectively. Experiments proved the effect of combined process is marvelous and the overall water quality of the final effluent could meet the class III national wastewater discharge standard of petrochemical industry of China (GB8978-1996).

Study on the Advanced Treatment of Printing and Dyeing Wastewater by Fenton Oxidation

2014 ◽  
Vol 1010-1012 ◽  
pp. 805-808
Author(s):  
Xiu Wen Wu ◽  
Ping Ma ◽  
Hui Xia Lan ◽  
Heng Zhang ◽  
Shan Hong Lan
Keyword(s):  
Reaction Time ◽  
Removal Efficiency ◽  
Treatment Effect ◽  
Cod Removal ◽  
Fenton Oxidation ◽  
Advanced Treatment ◽  
Dyeing Wastewater ◽  
Printing And Dyeing Wastewater ◽  
Cod Removal Efficiency

The influence of H2O2、addition of Fe2+、pH、reaction time and temperature to advanced treatment effect of printing and dyeing wastewater with Fenton oxidation was studied. The results showed that when the addition of H2O2(the concentration was 30%) was 3mL/L,the addition of FeSO4·7H2O was 1.6g/L,pH was 4,the temperature was about 30°C,reacting time was 35min,the COD removal efficiency achieved above 55%,COD of effluent was below 45mg/L.

Advanced Treatment of Ship Sewage by Fenton-Oxidation Process

2014 ◽  
Vol 1010-1012 ◽  
pp. 595-598
Author(s):  
Gui Fang Liu ◽  
Hong Mei Yan ◽  
Yuan Gao ◽  
Ya Quan Sun ◽  
Yu Ping Zhang
Keyword(s):  
Water Quality ◽  
Reaction Time ◽  
Optimum Condition ◽  
Oxidation Process ◽  
Removal Rate ◽  
Quality Standard ◽  
Fenton Oxidation ◽  
Domestic Water ◽  
Cod Removal Rate ◽  
Fenton Oxidation Process

Fenton-oxidation process was used to treat the simulation ship sewage that had met the requirement of IMO discharge standard. The effects of reaction time, doses of H2O2 and FeSO4, pH and temperature on COD removal rate were investigated. The results showed that the optimum condition for treating simulation ship sewage was as follows: pH=3.0, concentration of H2O2=9 mmol/L, concentration of FeSO4=3 mmol/L, and reaction time=30 min. Under the optimum condition, the removal rate of COD was to 62.7%. The water quality of the effluent could meet Miscellaneous Domestic Water Quality Standard.

Combined Fenton-MF process increases acrylonitrile removal

2003 ◽  
Vol 47 (9) ◽  
pp. 179-184 ◽  
Author(s):  
C.-Y. Chang ◽  
C.-C. Wang ◽  
D.-J. Chang ◽  
J.-S. Chang
Keyword(s):  
Acrylic Acid ◽  
Removal Efficiency ◽  
Polyacrylic Acid ◽  
Oxidation Process ◽  
Fenton Oxidation ◽  
The Other ◽  
Raw Material ◽  
Molar Ratio ◽  
Operational Mode ◽  
Fenton Oxidation Process

The Fenton oxidation process is possessed of the advantages of both oxidation and coagulation processes. In addition to these functions, Fenton's reagent is also a typical initiator of polymerization. The application of the Fenton-microfiltration process for removal of acrylonitrile (AN), which is the major raw material for manufacturing ABS resins, was investigated. As for Fenton oxidation, in the range of pH 2 to pH 4, AN removal efficiency increased as the pH increased. In experiments of the same initial molar ratio of [FeSO4]0/[H2O2]0, the higher dosage can obtain the higher removal efficiency. At pH 4, the AN removal increased as the [H2O2]0 increased for each [FeSO4]0. Acrylic acid and acrylamide were detected in the solution after Fenton oxidation. On the other hand, acrylamide, polyacrylamide, and polyacrylic acid exist in the precipitate after the Fenton oxidation of AN solution. Moreover, It was also found that the operational mode is an important factor of the combined Fenton-MF process.

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.

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.

Degradation of Ciprofloxacin in Aqueous Solution by the Fenton Process

2012 ◽  
Vol 610-613 ◽  
pp. 352-355 ◽  
Author(s):  
Ji Feng Yang ◽  
Hong Hui Chen
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Oxidation Process ◽  
Ph Value ◽  
Fenton Process ◽  
Ferrous Ions ◽  
Reaction Conditions ◽  
Initial Ph ◽  
Optimum Reaction ◽  
Ciprofloxacin Removal

The present study provides results describing the degradation performance of ciprofloxacin antibiotic via Fenton treatment. The effect of reaction conditions including the initial pH value, and dosages of ferrous ions and hydrogen peroxide on ciprofloxacin and COD removal was investigated. Ciprofloxacin removal efficiency of more than 90% was achieved under optimum reaction conditions of pH value of 2, dosages of 0.75 mmol/L of ferrous ion, and 2.0 mmol/L of hydrogen peroxide after 10min. However, the change of COD in aqueous solution was not obvious and further study about intermediate products during oxidation process should be carried out in the future.

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