Combined Fenton-MF process increases acrylonitrile removal

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.

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Influence of PH on Treatment of Medium Pulping Wastewater with Micro Electrolysis Coupling with Fenton Oxidation-Flocculation Technology

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.233-235.1794 ◽

2011 ◽

Vol 233-235 ◽

pp. 1794-1798

Author(s):

Shan Hong Lan ◽

Xiu Wen Wu

Keyword(s):

Removal Efficiency ◽

Oxidation Process ◽

Influencing Factor ◽

Fenton Oxidation ◽

First Order ◽

Scrap Iron ◽

Fenton Oxidation Process ◽

The Cost ◽

Influence Of Ph ◽

Flocculation Effect

The scrap iron used in micro electrolytic technology was from the waste of a fabrication plant, this behavior possessed an effect of treating wastes with processes of wastes against one another and the generated Fe2+ can be used in the Fenton oxidation process, Fe3+ generated from which can be linked up with the flocculation technology. So it was capable of cutting down the cost and improving the treatment effect using micro electrolysis coupling with Fenton oxidation-flocculation technology to treat medium pulping wastewater. pH is an important influencing factor of micro electrolysis, Fenton oxidation and flocculation, and in this study the influence of pH on micro electrolytic technology was studied firstly, the results showed that the removal efficiency of COD and chrominance reached 65% and 60%, respectively and the concentration of generated Fe2+ reached 157mg/L when pH was 4. Then the influence of pH on the Fenton oxidation process was studied, the results showed that without extra Fe2+, the removal efficiency of COD by Fenton process increased at fist and then decreased with the increase of pH, and the removal efficiency of COD and chrominance reached 84% and 83%, respectively, and the concentration of generated Fe3+ reached 217mg/L at this moment. At last the study of the influence of pH on the flocculation effect with generated Fe3+ and PAM was carried out, the results showed that the COD removal efficiency reached 41% and the chrominance removal efficiency reached 75%, the final chrominance was 4 and the COD concentration was 45mg/L which was lower than 60mg/L, that met with the first order of effluent standard.

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Treatment of POME using Fenton oxidation process: removal efficiency, optimization, and acidity condition

Desalination and Water Treatment ◽

10.1080/19443994.2016.1141715 ◽

2016 ◽

Vol 57 (50) ◽

pp. 23750-23759 ◽

Cited By ~ 10

Author(s):

Mohamed Osman Saeed ◽

Khairun Azizi Mohd Azizli ◽

Mohamed Hasnain Isa ◽

Ezerie Henry Ezechi

Keyword(s):

Removal Efficiency ◽

Oxidation Process ◽

Fenton Oxidation ◽

Efficiency Optimization ◽

Fenton Oxidation Process

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Treatment of Sodium Formate Wastewater by Fenton Oxidation Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.573-574.627 ◽

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.

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Research on Harbor Oily Wastewater Treatment by Fenton Oxidation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.322.164 ◽

2011 ◽

Vol 322 ◽

pp. 164-168

Author(s):

Yan Jie Wei ◽

Guo Yi Li ◽

Bin Wang

Keyword(s):

Reaction Temperature ◽

Oxidation Process ◽

Operating Conditions ◽

Fenton Oxidation ◽

Molar Ratio ◽

Reaction Conditions ◽

Optimum Parameters ◽

Fenton Oxidation Process ◽

Oily Wastewater Treatment ◽

Single Factor Experiment

Fenton oxidation was applied to treat harbor oil-contained wastewater after coagulation-sedimentation process. Orthogonal test and single-factor experiment showed that the effectiveness of the operating conditions on Fenton process and its performance was in the order of pH>H2O2 dosage>H2O2 /Fe2+ (molar ratio)> reaction time (t)>reaction temperature (T), pH had the greatest effect, in comparison, reaction temperature had the minimal effect. The optimum parameters of Fenton oxidation process were pH of 2.5-4.5, dosage of H2O2 of 4-6ml/L, H2O2/Fe2+ of 20, t of 60-90min, and T of 40°C. Under these reaction conditions, COD concentration was decreased from 317.5mg/L to 132.3mg/L, with the removal efficiency of 58.3%.

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Treatment of ultrahigh chemical oxygen demand chemical wastewater by Fenton oxidation

Journal of Physics Conference Series ◽

10.1088/1742-6596/2109/1/012011 ◽

2021 ◽

Vol 2109 (1) ◽

pp. 012011

Author(s):

Xingfu Xue

Keyword(s):

Oxidation Process ◽

Removal Rate ◽

Oxygen Demand ◽

Fenton Oxidation ◽

Molar Ratio ◽

Chemical Plants ◽

Clear Liquid ◽

Second Stage ◽

Optimum Ph ◽

Fenton Oxidation Process

Abstract The article focuses on the Fenton oxidation process for the treatment of ultrahigh COD chemical wastewater from chemical plants. Optimum pH was determined as 2.0 and 10.0 for the first (oxidation) and second stage (coagulation) of the Fenton process, respectively. 0.465gFeSO4·7H2O, H2O2(30%)2ml, the mole tatio of H2O2 : Fe2+=10:1, adjust the pH of the solution to 10, after 1.5 hours of agitation, then add 5% PAM2ml to the solution, filtrate, extract, filtrate the clear liquid and dilute it three times, take 200ml of the diluted liquid, and add 0.465gFeSO4·7H2O, H2O2(30%)2ml, the mole tatio of H2O2 : Fe2+=10:1, adjust the pH of the solution to 10, after 1.5 hours of agitation, then add 5% PAM2ml to the solution, static stratification. For chemical wastewater, when the molar ratio H2O2/Fe2+ is 10:1, the removal rate of COD is the highest, provided 86.21–86.45% COD removal.

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The Pretreatment of Polyvinyl Alcohol Wastewater with Flocculation-Fenton Oxidation Technology Based on Fe2+

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.518-523.3089 ◽

2012 ◽

Vol 518-523 ◽

pp. 3089-3095

Author(s):

Shan Hong Lan ◽

Xiu Wen Wu ◽

Yue Ting Wang ◽

Ping Ting Liu

Keyword(s):

Polyvinyl Alcohol ◽

Removal Efficiency ◽

Oxidation Process ◽

Removal Rate ◽

Fenton Oxidation ◽

Oxidation Technology ◽

Fenton Oxidation Process ◽

Better Than ◽

Raw Wastewater

The polyvinyl alcohol (PVA) wastewater was pretreated by the process of flocculation-Fenton oxidation. Raw wastewater was treated by the different flocculants first. The results showed that when the flocculant FeSO4 was used, its effect was better than Fe2(SO4)3 and PAC, the dosage of it was 10g/L, under which COD removal efficiency reached 61.72%. The effects of FeSO4 and H2O2 addition and pH on treatment effect were studied in the follow-up Fenton oxidation. The results showed that when the addition of FeSO4 was 20g/L, the dosage of H2O2 was 250mL/L, pH was 4, the removal efficiency of COD reached over 90%. The experiments of fractionated adding the reagents showed that the removal rate of COD was significantly higher in the situation of fractionated adding FeSO4 required in the flocculation and Fenton oxidation process than one-time added. The removal rate of COD changed little when the H2O2 fractionated addition in the process of Fenton oxidation.

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Study on Pretreatment of Dye Wastewater by Fenton Oxidation Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.627.378 ◽

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.

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