title: Treatment of aqueous and simulated wastewater of Luganil blue N dye--a new electrochemical approach.
abstract: Treatment of aqueous solution containing Luganil blue N (LBN) azo dye was performed by an electrochemical method under galvanostatic conditions using an undivided cell with platinum electrodes as working and auxiliary electrodes and standard calomel as the reference electrode. The aqueous solution of NaCl was used as the supporting electrolyte. Preliminary voltammetric studies were performed to establish the mode of degradation process. The effect of polarity of the electrode on degradation and decolouration rate was studied. The effect of the supporting electrolytes, concentration of NaCl, electrolysis time, solution pH and initial dye concentration on degradation rate were evaluated. The optimized operating conditions were used for the treatment of simulated wastewater containing LBN dye. The electrolysis process was monitored by an ultraviolet-visible spectrophotometer and measuring the chemical oxygen demand of the electrolysed solutions. The degradation products were identified using gas chromatograph/mass spectrometry studies, and a suitable mechanism for the LBN dye degradation was proposed.
authors.affiliation: Department ofPG Studies & Research in Chemistry, School of Chemical Sciences, Jnana Sahyadri, Kuvempu University, Shimoga, India.
authors.forename: Sarala
authors.initials: S
authors.lastname: Puttappa
authors.forename: Venkatesha Thimmappa
authors.initials: VT
authors.lastname: Venkatarangaiah
mesh_terms: D001391:Azo Compounds / Q000737:chemistry*; D057919:Biological Oxygen Demand Analysis; D004572:Electrolysis; D006863:Hydrogen-Ion Concentration; D012965:Sodium Chloride / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*
chemical_list: D001391:Azo Compounds; C571749:Luganil blue N; D014874:Water Pollutants, Chemical; D012965:Sodium Chloride