Facile Extraction of Coomassie Brilliant Blue G into Nanovesicles of Octanoic acid as a Fantastic Green Supra Molecular Solvent Phase

The separation of polluting dyes from economical and industrial wastewaters is so important. Liquid-liquid mico-extraction is a kind of separation methods for pollutant removal from aqueous samples. Since organic solvents are toxic and flammable, nowadays, the substituting of green solvents is one of interest. So, supramolecular solvents (SUPRAs) can be a good candidate in liquid-liquid micro-extraction methods. SUPRAs have some advantages in comparison with other organic solvents, such as: friendly environment, not flammability, and high extraction efficiency in low volumes.In this research, supramolecular solvent containing nanovesicles of octanoic acid (SUPRA) was synthesized and tetrabutyl ammonium hydroxide was used as coacervating agent. The characterization of nanovesicle aggregates in SUPRA phase was proved by dynamic light scatterig spectroscopy (DLS). Then, produced SUPRA was used as green separating liquid phase۲to extract Coomassie Brilliant Blue G (CBBG) from aqueous samples. Also, the effective parameters on dye extraction, such as: the concentration, volume, temperature, and pH of dye solution, separation time, types of aggregates in SUPRA phase and volume of liquid SUPRA phase, were investigated. Under optimal conditions: ۵۰ ml of ۲ ppm (CBBG) at pH=۵.۴ in ambient temperature (۲۵°C), about ۹۳%±۰.۰۶۳ (n=۱۰) of dye was extracted into ۳۵۵μl of SUPRA in ۲۰ min of extraction time. Pre-concentration factor was obtained about ۱۴۰.۸۴. Also the effects of matrices were investigated and the results showed that, under optimal conditions, quantitative amount of dye could extract into ۳۵۵ μl of SUPRA phase after ۲۰ min from Korouz company wastewater, Karaj river water, and Shahr-e-Qods drinking water. Therefore, there was no significant interfering effect on dye removal and also dye could be separated easily and in a short time (۲۰ min) into low volume of environmentally friendly SUPRA phase (۰.۳۵۵ ml).

کلیدواژه ها:

Green supramolecular solvent ، Coomassie Brilliant Blue G ، Liquid-liquid microextraction ، Nanovesicles ، Octanoic acid