Importance of H2O2/Fe2+ ratio in Fenton's treatment of a carpet dyeing wastewater

Gulkaya, Ipek; Sürücü, Gülerman; Dilek, Filiz B.

doi:10.1016/j.jhazmat.2006.01.006

Cited by 195 publications

(114 citation statements)

References 36 publications

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“…The optimum value achieved was equal to that obtained when applying the Fenton process to the pre-treated effluent (Approach 1) and similar to that reported in other works ( (Ramirez et al, 2005;Gulkaya et al, 2006;Sun et al, 2007;; 2012 a)).…”

Section: Effect Of the Temperaturesupporting

confidence: 88%

“…For mineralization, after 30 min a value of 45.5% was achieved, but it continued to increase slowly (50.4% and 53.8% for 60 and 120 min of reaction, respectively). This optimum value for temperature was also reported in other studies that evaluated the removal of total organic carbon and dyes (Ramirez et al, 2005;Gulkaya et al, 2006;Sun et al, 2007;; 2012 a)).…”

Section: Effect Of the Temperaturesupporting

confidence: 83%

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A new strategy for treating a cotton dyeing wastewater - integration of physical-chemical and advanced oxidation processes

Rodrigues

Boaventura

Madeira

2014

IJEWM

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New strategies were herein applied for treating a cotton dyeing wastewater: coagulation/flocculation followed by Fenton's oxidation -Approach 1, Fenton process per se -Approach 2, and Fenton followed by coagulation/flocculation -Approach 3, aiming reducing chemicals consumption. Regarding the cost analysis, which is crucial for deciding on the best strategy to implement, it was found that in Approach 1 and Approach 2 the hydrogen peroxide has a major influence on the total costs as compared to ferrous ion. In Approach 3, the total costs are again mostly related to the consumption of reagents in the oxidation stage. The integration of the Fenton's process followed by coagulation/flocculation provided an effluent that meets the discharge limits, with global organic matter removals of 55.6% for COD, 42.7% for BOD and 70.4% for DOC, and almost complete color reduction (99.6%). However, the combined treatment of coagulation/flocculation followed by Fenton's oxidation exhibits also high overall efficiencies (61.7%, 25.8% and 71.2% for COD, BOD5 and DOC removal, respectively, with almost complete decolorization) but simultaneously smaller operating costs associated with chemicals consumption (0.82 €/m 3 ), putting into evidence the usefulness of the novel strategy implemented: use of the residual dissolved iron employed as coagulant in the first stage as catalyst in the subsequent Fenton's oxidation.

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Section: Effect Of the Temperaturesupporting

confidence: 88%

Section: Effect Of the Temperaturesupporting

confidence: 83%

A new strategy for treating a cotton dyeing wastewater - integration of physical-chemical and advanced oxidation processes

Rodrigues

Boaventura

Madeira

2014

IJEWM

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“…The low activity at high pH has been reported in the literature [21], [23] Additionally, the oxidation potential of hydroxyl radicals was known to decrease with increasing pH. The decolorization rates become significantly slower with decreasing pH while a similar behavior is also found in highly alkaline solutions [24]. The results show that the optimum pH for photo-phenton was found to be pH 3, a result found to be similar to others research [22].…”

Section: Effect Of Initial Ph Ph Plays An Important Role In the Mesupporting

confidence: 85%

Photocatalytic Degradation of Methylene Blue by Magnetite+H2O2+UV Process

Reza¹,

Kurny²,

Gulshan³

2016

IJESD

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Abstract-The photocatalytic degradation of Methylene Blue (MB) dye has been investigated by locally available Magnetite with H 2 O 2 . Parameters such as Magnetite dosage, concentration of dye pH effect, light intensity and oxidizing agent (H 2 O 2 ) were used to study the degradation of MB. The degradation rates were found to be strongly influenced by all the above parameters. The Magnetite/ H 2 O 2 /UV process proved to be capable of decolorizing Methylene Blue.Index Terms-Photocatalytic degradation, magnetite, oxidizing agent, methylene blue. I. INTRODUCTIONAt present, 100000 different types of dyes with annual production rate of 7 × 10 5 tons are produced. Among them textile industries consume about 36000 ton/year dye. Up to 20% of the total world production of dyes is lost during the dyeing process and is released in the textile effluents [1], [2]. These synthetic dyes can cause considerable environmental pollution and are injurious to health due to their stability and toxicity. A wide range of physical methods has been developed for the removal of synthetic dyes. Conventional water treatment technologies such as physical methods mainly provide a phase transter of the contaminants from waste water to solid waste which require further treatments. On the other hand chemical oxidation methods include a family of processes that may be appropriate for treating dye pollutants. Advanced oxidation processes are promising technologies which aim at the decolorization and mineralization of a wide range of dyes and transform dyes into biodegradable or harmless products [3]. Photo-Fenton's oxidation is a homogeneous catalytic oxidation process using a mixture of hydrogen peroxide and ferrous ions. The addition of UV or artificial light to Fenton's process accelerate dye decolorization as it influences the direct formation of Magnetite (Fe 3 O 4 ) is a semimetal semiconductor with bandgap 0.14 eV. It contains both the Fe 2+ and Fe 3+ cations. So, it is expected that Magnitite will work as a photocatalyst. The possibility of using powder magnetite adsorption-Fenton oxidation as a method for removal of azo dye acid red B from water was studied by Rongcheng and Jiuhui [5]. Madrakian et al. [6] in their studies used magnetite nanoparticlesmodified low-cost activated carbon (MMAC) as an adsorbent for the removal of the anionic and cationic dyes Congo red, reactive blue 19, thionine, janus green B, methylthymol blue and mordant Blue 29, from aqueous solutions. Utilization of magnetite nanoparticles modified with Cetyltrimethylammonium bromide (CTAB) for removal of Nyloset Yellow E-RK dye from water and waste water by magnetic force was also investigated by Dalali et al. [7].The main objective of this study was to study the feasibility of Magnetite as a photocatalyst for decolorization of Methylene Blue dye. The influence of different operational parameters such as, Magnetite dosage, H 2 O 2 dosage, pH, dye concentration, temperature, light source and the presence of salt which affect the efficiency of Photo-Fenton's reaction...

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“…Among AOPs, Fenton's reagent has been used (either alone or in combination with other treatments) as a chemical process for the treatment of a wide range of wastewaters. Recent applications of Fenton´s reagent include the pre-treatment of olive mill wastewater (Lucas & Peres, 2009), the treatment of landfill leachate (Deng & Englehardt, 2006;Zhang et al, 2005), copper mine wastewater (Mahiroglu et al, 2009), water-based printing ink wastewater (Ma & Xia, 2009) and cosmetic wastewaters (Bautista et al, 2007), the degradation of pesticide (Li et al, 2009;Chen et al, 2007), antibiotic (Ay & Kargi, 2010;Elmolla & Chaudhuri, 2009), high-strength livestock wastewater (Lee & Shoda, 2008) and organic compounds of nuclear laundry water (Vilve et al, 2009), the oxidation of combined industrial and domestic wastewater (Badawy & Ali, 2006), the pre-oxidation of pharmaceutical wastewaters (Martínez et al, 2003), the treatment of water-based paint wastewater (Kurt et al, 2006) and cellulose bleaching effluents (Torrades et al, 2003), the degradation of the explosives 2,4,6-trinitrotoluene (TNT) and hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) after iron pretreatment (Oh et al, 2003), and the treatment of different streams of textile wastewaters, such as the treatment of hot desizing wastewaters (Lin & Lo, 1997), and the treatment of dye wastewaters (Wang et al, 2008;Gulkaya et al, 2006). Fenton´s reagent is also combined with biological process, as a pre-treatment to enhance the biodegradability of the recalcitrant compounds and lower the toxicity (Padoley et al, 2011, Mandal et al, 2010, Badawy et al, 2009 or as a post-treatment to improve the efficiency of the wastewater treatment (Ben et al, 2009, Yetilmezsoy & Sakar, 2008).…”

Section: Theoretical Approachmentioning

confidence: 99%