An electrochemical sensor based on carboxylated multiwalled carbonnanotubes with [bmmim]PF6 ionic liquid for simultaneous determination ofhazardous dyes in wastewaters

There are many negative effects on the environment and human health as a result of industrialtextile chemical wastes. It is important to proffer right removal or use management methods tosafeguard life. Water is the main medium for the removal of impurities in the application of dyesand finishing agents during their major operations in the textile industry. Therefore, the mainconcern is constant discharge of untreated dye effluents from the processing units to thesurrounding water streams, making it highly polluted with toxics and recalcitrant substances.This research, is tried to develop a simple and sensitive electrochemical sensor for thedetermination of acid blue 29 (AB 29) and mordant yellow 10 (MY 10), as textile dyes pollutantsin industrial waste waters. Therefore, the first electrochemical sensor was developed for theirsimultaneous determination by modifying a glassy carbon electrode (GCE) with a compositearranged from 1-Butyl-2,3-dimethylimidazolium hexafluorophosphate ([bmmim]PF6) 98% as anionic liquid (IL) and carboxylated multiwalled carbon nanotubes (CMWCNTs). Directelectrochemical oxidation of AB 29 and MY 10 at the modified electrode was investigated,showing that their peak currents were significantly enhanced due to the presence of the ionicliquid-carboxylated multiwalled carbon nanotubes glassy carbon electrode (IL/CMWCNTs-GCE). The effects of different parameters such as pH, accumulation time, accumulation potential,and scan rate on the sensitivity were investigated. Individual and simultaneous determinationswere performed by Differential pulse voltammetry (DPV) technique at optimum conditions.