Kinetic studies on the degradation of crystal violet by the Fenton oxidation process

2010 ◽  
Vol 62 (1) ◽  
pp. 1-7 ◽  
Author(s):  
H. Wu ◽  
M. M. Fan ◽  
C. F. Li ◽  
M. Peng ◽  
L. J. Sheng ◽  
...  
Keyword(s):  
Crystal Violet ◽  
Oxidation Process ◽  
Degradation Kinetics ◽  
Kinetic Studies ◽  
Fenton Oxidation ◽  
Dyeing Wastewater ◽  
First Order ◽  
Fenton Oxidation Process ◽  
System Variables ◽  
Kinetics Of

The degradation of dye crystal violet (CV) by Fenton oxidation process was investigated. The UV–Vis spectrogram has shown that CV can be degraded effectively by Fenton oxidation process. Different system variables namely initial H2O2 concentration, initial Fe2 +  concentration and reaction temperature, which have effect on the degradation of CV by Fenton oxidation process, have been studied systematically. The degradation kinetics of CV was also elucidated based on the experimental data. The degradation of CV obeys the first-order reaction kinetics. The kinetic model can be described as k = 1.5 exp(−(7.5)/(RT))[H2O2]00.8718[Fe2+]00.5062. According to the IR spectrogram, it is concluded that the benzene ring of crystal violet has been destroyed by Fenton oxidation. The result will be useful in treating dyeing wastewater containing CV by Fenton oxidation process.

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.

Removal of Acid Yellow 17 Dye by Fenton Oxidation Process

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Jehangeer Khan ◽  
Murtaza Sayed ◽  
Fayaz Ali ◽  
Hasan Mahmood Khan
Keyword(s):  
Ph Value ◽  
Degradation Kinetics ◽  
Research Work ◽  
Degradation Process ◽  
Optimum Conditions ◽  
Pseudo First Order Reaction ◽  
First Order ◽  
Degradation Reaction ◽  
Fenton Oxidation Process ◽  
Kinetics Of

Abstract In the present research work the degradation of acid yellow 17 (AY 17) by H2O2/Fe2+ was investigated. The effect of various conditions such as pH value, temperature, conc. of H2O2, Fe2+, conc. of AY 17 were studied. Additionally the scavenging effects of various anions such as Cl−, SO42−, CO32− and HCO3−, on percent degradation of AY 17 were examined. It was found that these anions decrease percent degradation as well as rate of degradation reaction. The optimum conditions were determined as [AY 17]=[Fe2+]=0.06 mM [H2O2]=0.9 mM, and pH 3.0 for 60 min of reaction time. It was found that at optimum conditions 89% degradation of AY17 was achieved. The degradation kinetics of AY17 followed pseudo-first-order reaction kinetics. Thermodynamic studies under natural conditions showed positive value of ∆H (enthalpy) which indicates the degradation process is endothermic.

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

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.

Optimization of the operating parameters using RSM for the Fenton oxidation process and adsorption on vegetal carbon of MO solutions

2014 ◽  
Vol 20 (3) ◽  
pp. 848-857 ◽  
Author(s):  
Adriana Saldaña-Robles ◽  
Ricardo Guerra-Sánchez ◽  
Manuel I. Maldonado-Rubio ◽  
Juan M. Peralta-Hernández
Keyword(s):  
Oxidation Process ◽  
Fenton Oxidation ◽  
Operating Parameters ◽  
Fenton Oxidation Process

scholarly journals Kinetics of K release from soils of Brazilian coffee regions: effect of organic acids

2008 ◽  
Vol 32 (2) ◽  
pp. 533-540 ◽  
Author(s):  
Vladimir Antônio Silva ◽  
Giuliano Marchi ◽  
Luiz Roberto Guimarães Guilherme ◽  
José Maria de Lima ◽  
Francisco Dias Nogueira ◽  
...  
Keyword(s):  
Release Kinetics ◽  
Kinetic Studies ◽  
Release Rates ◽  
First Order ◽  
Potassium Release ◽  
Minas Gerais State ◽  
Soil Clay ◽  
Extractant Solution ◽  
Kinetics Of ◽  
K Release

Kinetic studies on soil potassium release can contribute to a better understanding of K availability to plants. This study was conducted to evaluate K release rates from the whole soil, clay, silt, and sand fractions of B-horizon samples of a basalt-derived Oxisol and a sienite-derived Ultisol, both representative soils from coffee regions of Minas Gerais State, Brazil. Potassium was extracted from each fraction after eight different shaking time periods (0-665 h) with either 0.001 mol L-1 citrate or oxalate at a 1:10 solid:solution ratio. First-order, Elovich, zero-order, and parabolic diffusion equations were used to parameterize the time dependence of K release. For the Oxisol, the first-order equation fitted best to the experimental data of K release, with similar rates for all fractions and independent of the presence of citrate or oxalate in the extractant solution. For all studied Ultisol fractions, in which K release rates increased when extractions were performed with citrate solution, the Elovich model described K release kinetics most adequately. The highest potassium release rate of the Ultisol silt fraction was probably due to the transference of "non-exchangeable" K to the extractant solution, whereas in the Oxisol exchangeable potassium represented the main K source in all studied fractions.

Pollutant removal and biodegradation assessment of tannery effluent treated by conventional Fenton oxidation process

2018 ◽  
Vol 6 (6) ◽  
pp. 7070-7079 ◽  
Author(s):  
Fernando H. Borba ◽  
Leandro Pellenz ◽  
Francine Bueno ◽  
Jonas Jean Inticher ◽  
Luana Braun ◽  
...  
Keyword(s):  
Oxidation Process ◽  
Pollutant Removal ◽  
Fenton Oxidation ◽  
Tannery Effluent ◽  
Fenton Oxidation Process

scholarly journals The Treatment of IRN77/78 Resin Using Fenton Oxidation Process

2018 ◽  
Vol 392 ◽  
pp. 032042
Author(s):  
Wendong Feng ◽  
Jian Li ◽  
Shaoqing Jia ◽  
Yunhai Wang ◽  
Dunyi Ye
Keyword(s):  
Oxidation Process ◽  
Fenton Oxidation ◽  
Fenton Oxidation Process
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