Smart Computing- Book ISBN- 978-81-953658-1-4

Authors:- Priya Saxena, Parag Saxena

Abstract :-Textile and dyeing sectors are highly water intensive sectors. Typically, untreated dye wastewaters are intensely coloured and highly resistant to biodegradation due to their complex chemical structures.In the present work, the decolorization and removal of Reactive Red 195 (RR-195) textile dye in aqueous medium by employing electrocoagulation technique using aluminium (Al) and iron (Fe) sacrificial anodes has been investigated. The treatment efficiency is analysed in terms of percentage decolorization of 25 mg/L of RR-195 dye solution at an initial pH of 7.7 and a current density of 6 mA/cm2 in 2 g/L NaCl electrolyte medium for an electrolysis duration of 30 min. The present study proves the efficacy of electrocoagulation, with Fe-Fe electrode pair resulting in a higher RR-195 dye decolorization efficiency of 96.4% as compared to 84.7% for Al-Al electrode pair.Pseudo-first order kinetic constant (k) values were observed to be 0.0618 min-1 and 0.1258 min-1 for Al-Al and Fe-Fe electrode pairs respectively implying higher dye decolourization and removal rates exhibited by Fe-Fe electrode pair.

Keywords: - Electrocoagulation (EC),Reactive textile dye, Reactive Red 195, Aluminium (Al) electrode, Iron (Fe) electrode, Electrolysis, Decolourization, Kinetics