1987
DOI: 10.1080/10934528709375331
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Anodic oxidation of a direct dye in an electrochemical reactor

Abstract: In this work, anodic oxidation of C.I. direct blue 21 was carried out in an electrochemical reactor at a constant temperature of 20°C.The technique was found successful in removing the color of the dye from aqueous solutions containing 0.5 M sodium sulfate. Variables studied were : initial dye concentration, solution flow rate to the reactor, anode area, current density and time duration of anodic oxidation. It was found that the rate of dye removal increased with increasing current density, duration of anodic… Show more

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Cited by 23 publications
(13 citation statements)
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“…Papers and patents on the direct electrochemical decolorization of colored wastewaters and effluents are scarce [226,318,319,[322][323][324][325]. Thus a carbon felt electrode was used in a flow-through cell for treatment of dyeing wastewaters.…”
Section: Oxidation Modementioning
confidence: 99%
See 1 more Smart Citation
“…Papers and patents on the direct electrochemical decolorization of colored wastewaters and effluents are scarce [226,318,319,[322][323][324][325]. Thus a carbon felt electrode was used in a flow-through cell for treatment of dyeing wastewaters.…”
Section: Oxidation Modementioning
confidence: 99%
“…At the bottom of the anode compartment a stainless steel screen is laid to support lead spheres which act as the anode. The cathode was a stainless steel sheet [324,325]. A bench scale set-up and flow diagram for direct electrochemical treatment of wastewaters using a fiber-optic guided-wavemeter for monitoring the color change (cf.…”
Section: Oxidation Modementioning
confidence: 99%
“…This includes biological aerobic (e.g., activated sludge, SBR, biofilter) [8][9][10] or anaerobic (e.g., UASB) [1,11] treatments, enzymatic biodegradation (actinomycetes, fungi) [12], chemical oxidation (H 2 O 2 /Fe 2? (Fenton), e.g., hypochlorite), [13,14] or reduction (e.g., Fe 0 ) [15], electrochemical oxidation (e.g., O 3 /UV, O 3 /H 2 O 2 , O 3 /UV/H 2 O 2 , H 2 O 2 /UV) [16,17], photodegradation (e.g., TiO 2 /UV, photo-Fenton) [18,19], adsorption (e.g., activated carbons, silica, biosorbents) [20,21], membrane separation (e.g., microfiltration, ultrafiltration, nanofiltration) [22], chemical coagulation/flocculation (e.g., aluminum, iron, or calcium salts) [23], and electrolytic treatments, which include electroflocculation [24], and/or electrocoagulation [25][26][27][28], and electro-oxidation [29][30][31].…”
Section: Introductionmentioning
confidence: 99%
“…1±3 The aim of the oxidation process is to convert all of the carbon and hydrogen atoms of the dye to carbon dioxide and water, but there is evidence for the formation of colourless intermediates 4 and, in the presence of chloride ions, of chlorinated organic products.…”
Section: Introductionmentioning
confidence: 99%