Effect of supporting electrolyte on electrolytic degradation of cyanide wastewater

Abstract

EFFECT OF SUPPORTING ELECTROLYTE ON ELECTROLYTIC DEGRADATION OF CYANIDE WASTEWATER The paper describes the influence of chloride ions on the electrochemical oxidation of cyanide from wastewater. Chloride ions are added in the form of NaCl (c=0.017 mol/L), and electrochemical oxidation is carried out in a laboratory electrochemical reactor with electrodes made of steel and stainless steel (j=10 mA/cm 2 , t=90 min). In these conditions the removal efficiency of cyanide on steel electrodes was E u = 91.5%, and with electrodes made of stainless steel E u = 99.5%.

Uticaj Elektrodnog Materijala Na Anodnu Oksidaciju Cijanidnih Otpadnih Voda

“…Uključuje elektrohemijsko doziranje metala i elektrohemijsku proizvodnju gasa. Različite gustine struja mogu biti poželjne u različitim situacijama, te je za izbor svakog elektrodnog materijala za određeni polutant bitan uticaj gustine struje na efekat degradacije polutanta [12]. Pored navedenih parametara, primjećeno je da dodatak pojednih anjona (u obliku neorganskih soli) dovodi do promjene efikasnosti elektrolitičke degradacije različitih polutanata (uticaj na provodljivost elektrolita, pojava raznih intermedijera, formiranje flokulanata ili koagulanata i sl.)…”

Decolorization of reactive violet 5 dye in textile wastewater by electrocoagulation

“…Although the dyestuff and colored substances in wastewater can be effectively destroyed by an advanced chemical oxidation such as UV/H 2 O 2 , O 3 [3,4] and adsorption using activated carbon [5,6], the costs of these methods are relatively high for an economically sustainable treatment of the textile industry wastewater. Recently we could note an increased interest in the development of electrochemical methods for removal of toxic organic substances present in wastewater [7][8][9][10][11][12]. Such methods were also successfully tested in different wastewater containing dye pollutants [13][14][15][16][17].…”