Degradation of safranin by heterogeneous Fenton processes using peanut shell ash based catalyst

2019 ◽  
Vol 79 (7) ◽  
pp. 1367-1375
Author(s):  
Amir Ikhlaq ◽  
Hafiza Zara Anwar ◽  
Farhan Javed ◽  
Saba Gull
Keyword(s):  
Research Work ◽  
Agitation Speed ◽  
Peanut Shell ◽  
H2o2 Concentration ◽  
Fenton Process ◽  
Heterogeneous Fenton ◽  
Initial Concentration ◽  
Industrial Sectors ◽  
Efficient Performance ◽  
Maximum Decolorization

Abstract Today, dyes are one of the major problematic pollutants in the environment and are broadly used in several industrial sectors. In the current research work, decolorization of safranin (basic dye) from aqueous solution was investigated using iron-impregnated peanut shell ash (Fe-PSA) as a catalyst in the UV-assisted heterogeneous Fenton process (Fe-PSA/H2O2/UV). The effect of parameters such as H2O2 concentration, catalyst dose, pH, initial dye concentration, temperature, and agitation speed was studied. The maximum decolorization of safranin was achieved at optimum parametric values of reagent dose = 8 mM, catalyst dose = 0.5 g, pH = 3, initial concentration of safranin = 50 ppm, temperature = 25 °C, and agitation speed = 200 rpm. The results revealed the efficient performance of Fe-PSA as catalyst in the Fe-PSA/H2O2/UV process for safranin treatment.

scholarly journals Degradation of industrial azo dye in aqueous solution by heterogeneous Fenton process (fly ash/H2O2)

2012 ◽  
Vol 66 (4) ◽  
pp. 487-496 ◽  
Author(s):  
Milena Becelic-Tomin ◽  
Milena Dalmacija ◽  
Bozo Dalmacija ◽  
Ljiljana Rajic ◽  
Dragana Tomasevic
Keyword(s):  
Fly Ash ◽  
Azo Dye ◽  
Power Plants ◽  
Thermal Power ◽  
Catalyst Support ◽  
Organic Carbon Content ◽  
Fenton Process ◽  
Heterogeneous Fenton ◽  
Initial Concentration ◽  
Initial Ph

The aim of this study was to investigate the possibilities and efficiency of heterogeneous Fenton process with the use of fly ash from thermal power plants Kolubara, Serbia, as the catalyst in the degradation of industrial azo dye Zetanyl Rosso B-NG. The effects of various experimental parameters such as pH, temperature, concentration of fly ash, the initial concentration of H2O2 and initial concentration of dye on the kinetics and efficiency of decolorization were investigated. Simultaneous leaching of iron from fly ash was monitored. The optimum conditions had been determined, and it was found that decolorization efficiency obtained after 150 min of reaction, was about 98.9%. The optimal parameters were: initial pH = 3; [H2O2]0 = 6 mM; dosage of fly ash = 0.1g/l (for dye concentration of 100 mg/l); temperature = 22 ?C. The effectiveness of the applied treatment for mineralization of dye solution was investigated, under optimal conditions determined by the examination of various factors influencing the decolorization process at the specified contact time. The maximum achieved reduction of total organic carbon content was 96.5%. The results indicate that the reuse of fly ash as the catalyst support in ?OH production in this process achieves significant efficiency in terms of decolorization, 94.4% and mineralization, 89.6%. Futhermore, fly ash showed adequate stability during the reaction (low iron leaching, concentrations under optimal reaction condition were about 2 mg/l).

scholarly journals Utilization of iron sludge resulted from electro-coagulation in heterogeneous photo-Fenton process

2020 ◽  
Vol 15 (4) ◽  
pp. 1228-1237
Author(s):  
Mahmoud Samy ◽  
Mohamed Gar Alalm ◽  
Mohamed Mossad
Keyword(s):  
Process Performance ◽  
H2o2 Concentration ◽  
Fenton Process ◽  
Dark Reaction ◽  
Initial Concentration ◽  
X Ray ◽  
Iron Salts ◽  
Electrocoagulation Process ◽  
Electro Coagulation ◽  
Scanning Electron

Abstract The iron sludge generated from an electrocoagulation process was employed for the degradation of phenol through photo-Fenton process instead of iron salts. The morphology, functional groups and chemical composition of the iron sludge were investigated using scanning electron microscopy, Fourier infrared spectroscopy, and energy-dispersive X-ray spectroscopy. The effects of iron dose, H2O2 concentration, reaction time and initial concentration of phenol on photo-Fenton process performance were studied. The degradation efficiency of phenol reached 100% in the case of light compared to 68.6% in the case of dark reaction at pH of 3, iron dose of 150 mg/L and H2O2 concentration of 1.5 g/L. The degradation efficiencies of phenol were 100%, 71.3 and 51% at initial phenol concentrations of 50 mg/L, 100 mg/L and 150 mg/L, respectively. The expected cost for the treatment of one cubic meter of the contaminated wastewater was estimated to be 0.6224 $/m3.

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 Heterogeneous fenton process using the mineral hematite for the discolouration of a reactive dye solution

2011 ◽  
Vol 28 (4) ◽  
pp. 605-616 ◽  
Author(s):  
F. V. F. Araujo ◽  
L. Yokoyama ◽  
L. A. C. Teixeira ◽  
J. C. Campos
Keyword(s):  
Reactive Dye ◽  
Fenton Process ◽  
Heterogeneous Fenton

scholarly journals TREATMENT OF WASTEWATER CONTAINING DYE MIXTURE USING PYRITE CINDER IN HETEROGENEOUS FENTON PROCESS

2018 ◽  
Author(s):  
Đurđa Kerkez ◽  
◽  
Milena Bečelić-Tomin ◽  
Aleksandra Kulić ◽  
Dragana Tomašević Pilipović ◽  
...  
Keyword(s):  
Fenton Process ◽  
Pyrite Cinder ◽  
Heterogeneous Fenton

scholarly journals An alternative low-cost adsorbent for gold recovery from cyanide-leached liquors: Adsorption isotherm and kinetic studies

2018 ◽  
Vol 37 (1-2) ◽  
pp. 3-23 ◽  
Author(s):  
Refiloe Tsolele ◽  
Fanyana Moses Mtunzi ◽  
Michael John Klink ◽  
Vusumzi Emmanuel Pakade
Keyword(s):  
Activated Carbons ◽  
Selective Adsorption ◽  
Low Cost ◽  
Kinetic Studies ◽  
Agitation Speed ◽  
Gold Recovery ◽  
Attractive Alternative ◽  
Solution Ph ◽  
Initial Concentration ◽  
Modified Activated Carbons

Pristine Macadamia nutshell-based activated carbons were chemically oxidized with different concentrations of H3PO4 and HNO3 to increase their surface adsorption properties and further explore if they could be an attractive alternative low-cost adsorbent for gold recovery from cyanide-leached liquors. The modified activated carbons were labeled MACN20, MACN40 and MACN55 to signify the materials prepared from 20%, 40% and 55% (v/v) HNO3, respectively. Similar nomenclature was followed for H3PO4-modified activated carbons. Brunauer-Emmet-Teller, scanning electron microscopy, thermogravimetric analysis, Fourier transform infrared spectroscopy, elemental analysis and X-ray diffraction spectroscopy were used to characterize the prepared activated carbons. The physical properties were attained through determining attrition, ash content, volatile matter and moisture content of all the activated carbons. Various parameters that affect selective adsorption such as the effect of initial concentration, time, agitation speed, interfering species and the dose of the adsorbent were investigated. Optimal parameters for gold ion adsorption were as follows: solution pH, 10; contact time, 6 h; agitation speed, 150 r/min; sorbent amount, 4 g and initial concentration, 5.5 mg/L. The observed selectivity order was not the same for all the adsorbents, but the adsorption of gold was found to be mostly influenced in the presence of nickel and least influenced by copper. MACN55 was found to be the most efficient adsorbent with 74% of gold adsorption from a real-world sample and displayed a similar performance to coconut-based activated carbons.

Conversion of Natural Clinoptilolite Microparticles to Nanorods by Glow Discharge Plasma: A Novel Fe-Impregnated Nanocatalyst for the Heterogeneous Fenton Process

2013 ◽  
Vol 52 (51) ◽  
pp. 18225-18233 ◽  
Author(s):  
Alireza Khataee ◽  
Soghra Bozorg ◽  
Sirous Khorram ◽  
Mehrangiz Fathinia ◽  
Younes Hanifehpour ◽  
...  
Keyword(s):  
Glow Discharge ◽  
Discharge Plasma ◽  
Glow Discharge Plasma ◽  
Fenton Process ◽  
Heterogeneous Fenton ◽  
Natural Clinoptilolite
Sign in / Sign up

Export Citation Format

Share Document