scholarly journals Effective heterogeneous electro-Fenton process of m-cresol with iron loaded actived carbon

RSC Advances ◽  
2015 ◽  
Vol 5 (39) ◽  
pp. 31049-31056 ◽  
Author(s):  
Loubna Bounab ◽  
Olalla Iglesias ◽  
Elisa González-Romero ◽  
Marta Pazos ◽  
M. Ángeles Sanromán
Keyword(s):  
Activated Carbon ◽  
Fenton Process ◽  
Fenton Catalyst ◽  
Actived Carbon

The degradation of m-cresol (MC) has been investigated by heterogeneous electro-Fenton process using iron loaded activated carbon (Fe-AC) as heterogeneous electro-Fenton catalyst.

Magnetic Nd2Fe14B Actived Carbon: Fabrication and Heterogeneous Fenton Oxidation of Congo Red

2014 ◽  
Vol 675-677 ◽  
pp. 426-429
Author(s):  
Chun Wei Yang ◽  
Dong Wang ◽  
Qian Tang
Keyword(s):  
Activated Carbon ◽  
Congo Red ◽  
Fenton Oxidation ◽  
Fenton Process ◽  
Heterogeneous Fenton ◽  
Pseudo First Order Reaction ◽  
Fenton Catalyst ◽  
Heterogeneous Fenton Oxidation ◽  
Dyestuff Wastewater ◽  
Actived Carbon

Magnetic Nd2Fe14B activated carbon, a new kind of heterogeneous Fenton catalyst has been synthesis to treat the dyestuff wastewater. The obtained catalysts were characterized by X-raydiffraction (XRD) and vibrating sample magnetometer (VSM), and the catalytic activity in heterogeneous Fenton oxidation of Congo red was evaluated. Experiments show that the Nd2Fe14B activated carbon has hard magnetic properties. The saturated magnetization, remanence and coercive force were 15.93emu/g, 6.0emu/g, and 1313Oe, respectively. The results also indicated that Nd2Fe14B activated carbon has good performance on azo dye Congo red oxidation with heterogeneous Fenton process. Under the optimum conditions ([NdFeB-AC-FC]0=20g/L, [H2O2]0= 8mmol/L and pH=7.0), Congo red degradation rate could reach 83.4%. The pH had few effects on heterogeneous Fenton process degraded Congo red. The kinetics studied shown that Congo red degraded followed the pseudo-first-order reaction by heterogeneous Fenton process.

scholarly journals Optimization of ACH Coagulant, Settling Time and Powdered Activated Carbon as Coagulant Aid with Economic Analysis

2021 ◽  
Keyword(s):  
Activated Carbon ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Settling Time ◽  
Raw Water ◽  
Economic Study ◽  
Optimal Process ◽  
Water Turbidity ◽  
Aluminum Sulphate ◽  
Actived Carbon

<p>Regular water treatment-plant (WTP) comprises of a number of units. Of course, problems exist throughout design and operation of the WTP units. Consequently, the current re-search aimed to minimize the shortcomings of the coagulation, sedimentation, and the adsorption methods through applying optimal process for these units. Additionally, eco-nomic analysis and the derivation mathematical models for the new coagulant (Aluminum Chlorohydrate (ACH)) and the traditional aluminum sulphate coagulant (Alum) were an-other objective of this work. Optimum coagulants for alum and ACH were obtained and presented for different raw water turbidities. The optimum settling time of 30 minutes and 40 minutes have been found for the settling of 1000 and 2000 NTU raw water sam-ples. Best dosages of 0.1 and 0.25 g/L of powdered actived carbon (PAC) were obtained for raw water turbidity of 419, and 1000 NTU which increased the removal efficiency of 28.95%, and 25.71%, respectively. Furthermore, the economic study for alum and ACH revealed that using ACH instead of alum led to reduction of cost by 32%. Commonly, it can be concluded that using ACH instead of alum is better because it is cheaper and more efficient. The predicted equations for the optimum dosages (Y) for alum (mg/L) and ACH (µl/L) dosages (X) were Y= 0.04 X + 14.42, and Y = 0.01 X + 0.72, respectively.</p>

Excellent Fenton-like catalyst application in alkaline solution

2019 ◽  
Vol 13 (02) ◽  
pp. 2050002 ◽  
Author(s):  
Fan Xia ◽  
Zhaodong Nan
Keyword(s):  
Catalytic Activity ◽  
Alkaline Solution ◽  
Catalytic Mechanism ◽  
Experimental Result ◽  
Environmental Restoration ◽  
Fenton Process ◽  
Fenton Catalyst ◽  
Effects Of Ph ◽  
Catalyst Dosage

Fenton process has been widely applied for environmental restoration. However, acidic and neutral solutions are always needed in order to obtain an excellent catalytic activity. Flower-like MoS2 was firstly used as a Fenton catalyst with higher activity in alkaline solution than that in acidic and neutral ones. The catalytic mechanism indicated that [Formula: see text] and [Formula: see text] radicals formation induced the excellent catalytic activity in alkaline solution. Effects of pH, catalyst dosage, H2O2 and RhB concentrations on catalytic activity were studied, and the quantitative relations were established. The experimental result demonstrated that the catalyst was stable in alkaline solution. The leaching Mo was smaller than 2[Formula: see text]mg/L.

scholarly journals Selection of the Activated Carbon Type for the Treatment of Landfill Leachate by Fenton-Adsorption Process

Molecules ◽  
2020 ◽  
Vol 25 (13) ◽  
pp. 3023
Author(s):  
Liliana San-Pedro ◽  
Roger Méndez-Novelo ◽  
Emanuel Hernández-Núñez ◽  
Manuel Flota-Bañuelos ◽  
Jorge Medina ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Adsorption Process ◽  
Physical Adsorption ◽  
Oxygen Demand ◽  
Isotherm Models ◽  
Adsorptive Capacity ◽  
Fenton Process ◽  
Landfill Leachates ◽  
Selection Of ◽  
Adsorption Stage

Sanitary landfill leachates usually have characteristics that depend on the region where they are generated and according to the age of the landfill, which is why a unique treatment for their sanitation has not been found. However, the adsorption preceded by the Fenton process has been proven to be highly efficient at removing contaminants. In this study, the adsorptive capacity of two types of activated carbon, granular and powdered, was analyzed to determine which was more efficient in the adsorption stage in the Fenton-adsorption process. Likewise, its behavior was analyzed using three isotherm models (Langmuir, Freundlich and Temkin), testing the raw leachate and the Fenton-treated one with both carbons. The adsorption that is carried out on the carbons is better adjusted to the Freundlich and Temkin models. It concludes that multilayers, through the physical adsorption, carry out the adsorption of pollutants on the surface of the carbons. The results show that, statistically, granular activated carbon is more efficient at removing chemical oxygen demand (COD), and powdered activated carbon removes color better. Finally, an adsorption column was designed for the Fenton-adsorption process that was able to remove 21.68 kgCOD/kg carbon. Removal efficiencies for color and COD were >99%.

Hemp derived activated carbon supported nanoscale zero–valent iron as a heterogeneous Fenton catalyst for the treatment of pulping effluent

BioResources ◽  
2020 ◽  
Vol 15 (3) ◽  
pp. 4996-5011
Author(s):  
Lihuan Mo ◽  
Sizai Zhou ◽  
Shuang Yang ◽  
Jie Gong ◽  
Jun Li
Keyword(s):  
Activated Carbon ◽  
Active Sites ◽  
Heterogeneous Catalysts ◽  
Removal Rate ◽  
Zero Valent Iron ◽  
Acid Activation ◽  
Heterogeneous Fenton ◽  
Fenton Catalyst ◽  
Nanoscale Zero Valent Iron ◽  
Heterogeneous Fenton Catalyst

Activated carbon (AC) and nanoscale zero–valent iron (nZVI) have been widely used in wastewater treatment, respectively, for the removal of organics. In this study, hemp fibers were applied to prepare AC by phosphoric acid activation at a carbonization temperature of 400°C. Then nZVI particles were immobilized onto the surface of hemp derived AC (HAC), and the composites (nZVI@HAC) were used as heterogeneous catalysts for Fenton–like treatment of pulping effluent. The as–prepared catalysts were characterized. The optimum conditions for Fenton–like reaction and the reusability of catalyst were investigated. Results showed that nZVI particles were well distributed on the surface of HAC without aggregation. Both HAC and nZVI@HAC have microporous structure. With the loading of nZVI, the catalysts were endowed with magnetism and more active sites. Under the optimal conditions (initial pH 3.0, H2O2 35 mmol/L, 2–nZVI@HAC 3.0 g/L), COD removal rate reached 87.74% of the highest. This work illustrated that the feasibility of HAC as a carrier of nZVI, and nZVI@HAC was an effective heterogeneous Fenton catalyst.

scholarly journals Effectiveness of the dispersion of iron nanoparticles within micropores and mesopores of activated carbon for Rhodamine B removal in wastewater by the heterogeneous Fenton process

2019 ◽  
Vol 9 (7) ◽  
Author(s):  
Bi Gouessé Henri Briton ◽  
Laurent Duclaux ◽  
Yohan Richardson ◽  
Kouassi Benjamin Yao ◽  
Laurence Reinert ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Rhodamine B ◽  
Photoelectron Spectroscopy ◽  
Catalytic Efficiency ◽  
Iron Sulfate ◽  
Fenton Process ◽  
Heterogeneous Fenton ◽  
Pore Size Distributions ◽  
Iron Based ◽  
Carbon Catalysts

Abstract Iron-based nanoparticles were formed in the pores of a micro- and mesoporous activated carbon made from banana spike by the impregnation of iron sulfate at various ratios and further pyrolysis, in order to prepare three catalysts AC@Fe/1, AC@Fe/2, AC@Fe/3 having iron mass contents of 1.6%, 2.2% and 3.3%, respectively. The pore size distributions, transmission electron microscope observations and X-ray photoelectron spectroscopy analyses have revealed that iron-based nanoparticles of 1–50 nm diameter, containing O and P, are located mainly in the supermicropores and mesopores of the activated carbon. Catalysts have been used to remove Rhodamine B in an aqueous solution by the heterogeneous Fenton process. AC@Fe/3 catalyst has allowed achieving 93% of solution discoloration compared to 87.4% for AC@Fe/2 and 78.5% for AC@Fe/1 after 180 min in batch reaction. The catalytic efficiency of AC@Fe/3 is attributed to the highest dispersion of the iron-based nanoparticles in the activated carbon porosity. The effects of hydrogen peroxide and initial dye concentration, pH, catalyst amount and temperature on the Rhodamine B removal kinetics catalyzed by AC@Fe/3 were studied. This catalyst showed remarkable performances of the Rhodamine B mineralization and possibility of recycling.

Decomposition of Organic Dye in Water through a Heterogeneous Fenton Process Catalyzed by Fe (III)-Grafted PTFE Fiber Complex

2012 ◽  
Vol 602-604 ◽  
pp. 913-916
Author(s):  
Zhi Zhong Ding ◽  
Yong Chun Dong
Keyword(s):  
Dye Degradation ◽  
Uv Light ◽  
Light Irradiation ◽  
Fenton Process ◽  
Heterogeneous Fenton ◽  
Irradiation Intensity ◽  
Uv Light Irradiation ◽  
Fenton Catalyst ◽  
Fe Content ◽  
Visible Irradiation

Fe (III)-modified polytetrafluoroethylene (PTFE) fiber complex was prepared with poly acrylic acid grafted PTFE fiber and FeCl3 aqueous solution and used a novel heterogeneous Fenton catalyst for the photo-assisted degradation of Rhodamine B in water. The results indicated that Fe (III)-grafted PTFE) fiber complex can significantly enhance the dye degradation at a wide pH media under light irradiation. Increasing Fe content of the catalyst, H2O2 concentration and visible irradiation intensity leads to a fast degradation. Moreover, UV light irradiation is much more effective than visible light irradiation for promoting dye degradation.

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