scholarly journals Theoretical and experimental study on the degradation mechanism of atrazine in Fenton oxidation treatment

RSC Advances ◽  
2017 ◽  
Vol 7 (3) ◽  
pp. 1581-1587 ◽  
Author(s):  
Xue Zhao ◽  
Chenxi Zhang ◽  
Shuguang Wang ◽  
Chao Song ◽  
Xiang Li
Keyword(s):  
Experimental Study ◽  
Degradation Mechanism ◽  
Fenton Oxidation ◽  
Oxidation Treatment ◽  
Reaction Barrier

Water can act as a catalyst to reduce the reaction barrier dramatically.

Electro-Fenton oxidation of a β-lactam antibiotic cefoperazone: Mineralization, biodegradability and degradation mechanism

Chemosphere ◽  
2021 ◽  
Vol 270 ◽  
pp. 129486
Author(s):  
Aimin Wang ◽  
Yanyu Zhang ◽  
Shanshan Han ◽  
Chunxiao Guo ◽  
Zhenjun Wen ◽  
...  
Keyword(s):  
Degradation Mechanism ◽  
Fenton Oxidation ◽  
Lactam Antibiotic

Research of 6-Nitry Industrial Wastewater Treatment by Coagulation-Fenton Oxidation

2012 ◽  
Vol 518-523 ◽  
pp. 2745-2748
Author(s):  
Ling Yan Ren ◽  
Gang Xu
Keyword(s):  
Treatment Effect ◽  
Industrial Wastewater ◽  
Removal Rate ◽  
Sulfate Solution ◽  
Cod Removal ◽  
Fenton Oxidation ◽  
Fenton Reagent ◽  
Oxidation Treatment ◽  
Cod Removal Rate ◽  
Solution Acidity

The paper adopted Coagulation-Fenton Oxidation Method on treating the wastewater of 6-nitro-1,2 diazonium oxygroup naphthalene-4-sulfoacid production process (i.e. 6-nitry wastewater), introduced the treatment effect of the combined technology used on 6-nitry wastewater, and studied the factors influencing the treatment effect, to determine the reasonable parameters of the technology on treating 6-nitry wastewater. The results showed that Using polyaluminium chloride (mass fraction 2%) as flocculant for treating 6-nitry wastewater, the COD removal rate reached up to 48.7%; Making Fenton reagent oxidation treatment on coagulation yielding water, under the best conditions for solution acidity controlled at pH3 or so, in the 100 mL wastewater, 30% hydrogen peroxide was 5.0 mL, 0.5 mol/L ferrous sulfate solution was 4.0 mL, reaction time was 60 min, the COD removal rate could reach 98% or more.

scholarly journals Degradation of Diallyl Phthalate (DAP) by Fenton Oxidation: Mechanistic and Kinetic Studies

2018 ◽  
Vol 9 (1) ◽  
pp. 23
Author(s):  
Sondos Dbira ◽  
Nasr Bensalah ◽  
Moustafa Zagho ◽  
Ahmed Bedoui
Keyword(s):  
High Performance ◽  
Hplc Analysis ◽  
Degradation Mechanism ◽  
Kinetic Studies ◽  
Cost Effective ◽  
Fenton Oxidation ◽  
Fenton’S Reaction ◽  
Toc Removal ◽  
Initial Ph ◽  
Diallyl Phthalate

In this work, the degradation and mineralization of Diallyl Phthalate (DAP) in water by Fenton oxidation was investigated. The effects of different experimental parameters including the initial pH, the hydrogen peroxide (H2O2) dose, the catalyst (Fe2+) dose, the iron source, and the DAP concentration on the rate and the yield of DAP degradation by Fenton oxidation were evaluated. DAP and its intermediates were quantified by high performance liquid chromatography (HPLC) analysis and the measurement of total organic carbon (TOC) during Fenton oxidation. The results obtained confirmed that hydroxyl radicals (HO•) generated from Fenton’s reaction were capable of completely eliminating DAP from water. Fenton oxidation of 100 mg/L DAP aqueous solution at pH = 3.2 required 1000 mg/L H2O2 and 50 mg/L Fe2+. Under these conditions, more than TOC removal exceeded 95% after 300 min Fenton oxidation. The competition kinetics method was used to determine an absolute rate constant of 7.26.109 M−1 s−1 for the reaction between DAP and HO• radicals. HPLC analysis showed that phthalic acid, 1,2-dihydroxybenzene, 1,2,4-trihydroxybenzene, maleic acid, formic acid and oxalic acid were the main intermediates formed during DAP degradation. Accordingly, a simple DAP degradation mechanism by the Fenton reaction was proposed. These promising results proved the potential of Fenton oxidation as a cost-effective method for the decontamination of wastewaters containing phthalates.

scholarly journals Study on the degradation mechanism and pathway of benzene dye intermediate 4-methoxy-2-nitroaniline via multiple methods in Fenton oxidation process

RSC Advances ◽  
2018 ◽  
Vol 8 (20) ◽  
pp. 10764-10775 ◽  
Author(s):  
Ying Guo ◽  
Qiang Xue ◽  
Kangping Cui ◽  
Jia Zhang ◽  
Hui Wang ◽  
...  
Keyword(s):  
Oxidation Process ◽  
Environmental Concern ◽  
Degradation Mechanism ◽  
Fenton Oxidation ◽  
Multiple Methods ◽  
Carcinogenic Effects ◽  
Fenton Oxidation Process

Benzene dye intermediate (BDI) 4-methoxy-2-nitroaniline (4M2NA) wastewater has caused significant environmental concern due to its strong toxicity and potential carcinogenic effects.

Strength and Reliability of Metal-Coated Optical Fibers at High Temperatures

1998 ◽  
Vol 531 ◽  
Author(s):  
A. S. Biriukov ◽  
V. A. Bogatyrjov ◽  
V. F. Lebedev ◽  
A. A. Sysolyatin ◽  
A. G. Khitun
Keyword(s):  
Experimental Study ◽  
Melting Point ◽  
High Temperatures ◽  
Optical Fibers ◽  
Temperature Effects ◽  
Degradation Mechanism ◽  
Copper Coating ◽  
Mechanical Reliability ◽  
Optical Losses ◽  
Fiber Degradation

AbstractHermetically metal coated fibers are candidates for applications at high temperatures. To date, various metals with melting point up to 1400 °C have been used to coat fibers by the freezing technique. However, the major problems consist of ensuring mechanical reliability and acceptable optical losses in metal coated fibers at high temperatures. We present an experimental study of the temperature effects at 20 – 1050 °C on the performance of optical fibers with copper coating. Specific fiber degradation mechanism have been revealed

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