Volume No. 6 Issue No.: 4 Page No.: 973-980 April-June 2012

 

STUDIES ON EFFECTS OF ELECTRODES FOR DECONTA- MINATION OF DYES FROM WASTEWATER

 

Soni B. D.*and Ruparelia J. P.

Department of Chemical Engineering, Institute of Technology, Nirma University, Ahmedabad (INDIA)

 

Received on : March 5 ,2012

 

ABSTRACT

 

Industrial effluents usually contain large quantities of synthetic organic compounds. Effluents from such type of industries cause considerable pollutions and poses serious threat to environment. Conventional wastewater treatments cannot degrade the majority of these pollutants. In this paper degradation of synthetic organic dyes in wastewater were studied using electrochemical process. For electro-oxidation, electrodes were fabricated in laboratory using aluminum, iron, titanium and stainless steel as substrate. Metals were coated using different metal oxides RuO2, Sb2O5 and SnO2 by thermal decomposition method. Effects of fabricated electrodes Al/ Sb2O5, Fe/ Sb2O5-SnO2, Ti/ RuO2-Sb2O5-SnO2 and SS/RuO2-Sb2O5-SnO2 were studied on synthetic organic dyes Reactive Black -5, Reactive Yellow-245 and Acid Red-97 for degradation and decolourization. Experiments were conducted at pH 2, current density at 50 and distance between electrodes at 8mm for 50 and 100 ppm of dye solution with constant ionic strength. Colour and COD reduction were observed using UV spectrophotometer and COD reactor. Maximum colour and COD reduction was respectively 99% and 85% in Reactive yellow-145 employing Ti/ RuO2-Sb2O5-SnO2 electrode.

 

Keywords : Reactive dyes, Electrochemical degradation, UV spectrophotometer, COD reactor, Decolourization

 

 

BACK