Influence of operating parameters on electrocoagulation of C.I. disperse yellow 3

Ghernaout, Djamel; Al-Ghonamy, Abdulaziz I.; Naceur, Mohamed Wahib; Messaoudene, Noureddine Ait; Aichouni, Mohamed

doi:10.5599/jese.2014.0065

Cited by 22 publications

(11 citation statements)

References 37 publications

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“…Hence, the predominant mechanisms are: charge neutralization followed by precipitation of the dye-coagulant complexes, which are insoluble, and possibly adsorption of the complexes formed in the precipitates of metal hydroxides. 4. The increase in the initial dye content induces an increase in the percentage of abatement, but also a greater demand for coagulant dose which makes it possible to demonstrate a certain stoichiometry between the coagulant dose and the initial concentration of the dye.…”

Section: Discussionmentioning

confidence: 99%

“…Figures 6 (a) and (b) illustrate the different species of Fe (II) and Fe (III) present in solution as a function of pH. Since pH also conditions the chemical forms of alum and FeCl 3 , it is clear that the mechanisms involved in the removal of organic molecules could be very diverse [4,49]. Indeed: 1) At pH <6, the presence of the monomers and positively charged polymers such as Fe 3+ , Fe (OH) 2+ and Fe (OH) 2 + will cause a charge neutralization [9] of the dyes which are negatively charged resulting in direct precipitation of complexes (Fe-dye).…”

Section: Effect Of Phmentioning

confidence: 99%

“…Dyeing wastewater contains great quantities of dyestuff together with important quantities of suspended matters, dispersing agents, salts and trace metals [1][2][3][4][5][6]. Dyeing wastewater can produce hard ecological issues because of its elevated color, big amount of suspended matters and elevated chemical oxygen demand [7].…”

Section: Introductionmentioning

confidence: 99%

“…(R-SO 3 Na-Al polymeric) + Al (OH) 3(s) → particle 4At pH > 7, the alkalization of the medium is apparently unfavorable in the case of aluminum treatment. This is mainly due to the presence of negatively charged species, such as Al (OH) 4 -, which decreases their attraction to anionic organic compounds.…”

mentioning

confidence: 99%

“…The straight lines represent the solubility equilibrium for insoluble Fe (OH)2 and Fe (OH)3, respectively, and the dotted lines represent the predominance limits between soluble chemical species. (c) Diagram of solubility of Al (III) species as a function of pH[4].…”

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confidence: 99%

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Decolorization of BF Cibacete Blue (CB) and Red Solophenyle 3BL (RS) Using Aluminum Sulfate and Ferric Chloride

Ghernaout¹

2018

WJAC

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Coagulation process is largely applied for dye removal from textile wastewater treatment. This research aims to focus on implied mechanisms through coagulation of such wastewater. In this work, jar tests are performed to assess the coagulation process as a technique to treat synthetic solutions containing two textile dyes: BF cibacete blue (CB) and red solophenyle 3BL (RS). The effects of operational parameters such as coagulant type (FeCl 3 and Al 2 (SO 4) 3. 18H 2 O (alum)) and dose, initial pH, and dye concentration are studied. For a fixed 15 mg/L concentration of the two dyes, the FeCl 3 optimal doses are found to 80 and 20 mg/L for RS and CB with removal rates of 65 and 89%, respectively. Regarding alum, discoloration is achieved at 44 and 77% for CB and RS with optimal doses of 80 and 40 mg/L, respectively. Similar efficiency trends are also obtained for a 50 mg/L concentration of the two dyes. The involved coagulation mechanisms are: charge neutralization followed by precipitation of the insoluble dye-coagulant complexes, and their adsorption into the Al or Fe hydroxides. It would be interesting to follow a real effluent application on the textile industry possibly containing the two dyes tested in this work.

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Section: Discussionmentioning

confidence: 99%

Section: Effect Of Phmentioning

confidence: 99%