Pretreatment of acrylic fiber manufacturing wastewater by the Fenton process

Li, Jin; Zhang, Luan; Yu, Lian; Ji, Zhongguang

doi:10.1016/j.desal.2011.08.037

Cited by 36 publications

(18 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Ray et al (2006) reported that pH of wastewater outputs from acrylic fiber industry (its wastewater contains MG) at low pollution load is 4. Li et al (2012a) reported that Fenton process reached…”

Section: Effect Of Ph and The Mechanism Mg Degradationmentioning

confidence: 99%

Electro-Fenton method for the removal of Malachite Green: effect of operational parameters

et al. 2019

View full text Add to dashboard Cite

This study aims to evaluate the degradation and mineralization of Malachite Green (MG) in an electro-Fenton process (EFP). We studied the influence of several important parameters including solution pH (2-11), current density (0-20 mA/cm 2), H 2 O 2 concentration (0-200 mg/L) and MG concentrations (200, 600, 1000, 1500, 2000, 3000 mg/L) at different reaction time (2.5-30 min). The intermediates produced during the degradation were determined by GC-MS. The optimum pH, current density and H 2 O 2 concentration were found to be approximately 3, 10 mA/cm 2 and 50 mg/L, respectively. It was concluded that acidic pH was required to increase the efficiency of the EFP. At optimum conditions and a reaction time of 15 min, MG was completely removed without any significant variation in the corresponding maximum wavelengths or new absorption bands. Due to formation of intermediates, almost all the organic compounds were completely mineralized (95.3%) to CO 2 and water at reaction time of 30 min. Results indicated the effect of hydroxyl radical (• OH) on MG degradation is greater than that of superoxide radical scavenger (O ⋅− 2). The results showed that the degradation process of MG followed pseudo-firstorder kinetic model and the treatment time required in EFP was 4.6 times lower than ECP. Furthermore, the results showed that EFP was an extremely efficient process for degradation and mineralization of a high concentration of MG (1000 mg/L) at a short reaction time (30 min).

show abstract

Section: Effect Of Ph and The Mechanism Mg Degradationmentioning

confidence: 99%

Electro-Fenton method for the removal of Malachite Green: effect of operational parameters

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Among those techniques, it is worth referring the coagulation/flocculation and chemical oxidation with Fenton's reagent. The first process is very efficient for removing dyes and colloidal organic matter [11][12][13][14], while the second one is promising for dyes and organic compounds degradation [15][16][17], providing in most cases effluents more biodegradable and less toxic [15][16]18]. Some works have also been reported addressing integration of coagulation/flocculation with Fenton's oxidation for the treatment of dyes-containing wastewaters [19,20].…”

Section: Introductionmentioning

confidence: 99%

Technical and economic feasibility of polyester dyeing wastewater treatment by coagulation/flocculation and Fenton's oxidation

Rodrigues

Boaventura²,

Madeira

2014

Environmental Technology

View full text Add to dashboard Cite

30 31 This study aims to investigate the efficiency of individual and integrated processes applied to 32 organic matter abatement and biodegradability improvement of a polyester dyeing wastewater, 33 namely: coagulation/flocculation combined with Fenton's reagent (Approach 1), Fenton oxidation 34 alone (Approach 2) and its integration with coagulation/flocculation (Approach 3). The effects of 35 Fe 2+ dose, initial concentration of the oxidant (H2O2) and temperature during Fenton's oxidation 36 were evaluated in Approaches 1 and 2, while in Approach 3 it was also assessed the influence of 37 pH and flocculant dose, during the coagulation/flocculation stage. Toxicity and biodegradability 38 of the final effluent were also evaluated. After oxidation, a slight increase in the specific oxygen 39 uptake rate of the effluent was observed (from 27.0 to 28.5-30.0 mgO2/(gVSS h)) and inhibition to 40 Vibrio Fischeri was eliminated. An effluent that complies with discharge standards was obtained 41 in all cases; however, Approach 3 revealed to be a promising solution for treating this effluent as 42 it leads to smaller operating costs. Therefore, the use of dissolved iron resulting from Fenton's 43 oxidation as coagulant in the second stage was shown to be an innovative, efficient and 44 economically attractive strategy for treating these effluents. 45 46 47 48 49

show abstract

“…The use of high concentration Fe 2+ (for a prescribed H 2 O 2 concentration) increased the decomposition rate of H 2 O 2 , generating hydroperoxyl radicals (HO 2 • ), which is less reactive than HO • radicals. Furthermore, use of a much higher concentration of Fe 2+ causes the consumption of HO • radical and resulting formation of hydroxyl ion according to Equation (2) . The consumption of HO • occurs at a faster rate than the formation of HO • from Fe 2+ and H 2 O 2 .…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, use of a much higher concentration of Fe 2+ causes the consumption of HO • radical and resulting formation of hydroxyl ion according to Equation (2). 37 The consumption of HO • occurs at a faster rate than the formation of HO • from Fe 2+ and H 2 O 2 . When the concentration of Fe 3+ increases, Fe(OH) 3 nuclei formation starts occurring.…”

Section: Effect Of Fe 2+ Concentration On Fenton Processmentioning

confidence: 99%

Advanced treatment of biologically treated medium density fiberboard (MDF) wastewater with Fenton and Fenton enhanced hydrodynamic cavitation process

Balcik‐Canbolat

Sakar

Karagündüz

et al. 2016

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND Biological treatment processes are often ineffective for the treatment of medium density fiberboard (MDF) wastewater due the presence of non‐biodegradable and refractory compounds. Fenton and Fenton enhanced hydrodynamic cavitation (HC) processes may be cost effective solutions for the treatment of such wastewater. RESULTS Removals of COD, formaldehyde and color by Fenton and Fenton enhanced HC processes were investigated in this study. The optimum H2O2/Fe2+ molar ratio at the initial pH of 3 for the optimum COD removal efficiency was 2.5/1 in 70 min reaction time. Furthermore, faster removal rates of pollutants were also observed with HC enhanced Fenton process. The presence of various herbicides and fungicides in the wastewater were detected by gas chromatography/mass spectrometry (GC/MS). CONCLUSIONS The Fenton enhanced process resulted in faster COD removal rates than those obtained in Fenton alone. The Fenton enhanced HC process appears to be a cost‐effective alternative for the treatment of highly toxic and non‐biodegradable MDF wastewater. © 2016 Society of Chemical Industry

show abstract

Pretreatment of acrylic fiber manufacturing wastewater by the Fenton process

Cited by 36 publications

References 23 publications

Electro-Fenton method for the removal of Malachite Green: effect of operational parameters

Electro-Fenton method for the removal of Malachite Green: effect of operational parameters

Technical and economic feasibility of polyester dyeing wastewater treatment by coagulation/flocculation and Fenton's oxidation

Advanced treatment of biologically treated medium density fiberboard (MDF) wastewater with Fenton and Fenton enhanced hydrodynamic cavitation process

Contact Info

Product

Resources

About