Evaluation of possibility of textile dye removal from wastewater by aqueous two-phase extraction

Abstract

Possibility of removal of textile dye from wastewater by extraction in aqueous two-phase system (ATPS) was studied in model solution of Acid blue 9. Partitioning of the dye in ATPSs composed of polyethylene glycol of different molecular weights (1,500, 6,000, and 10,000 g/mol) and several salts (ammonium sulfate, sodium sulfate, and sodium citrate) was investigated. Best results in respect of partitioning coefficient and concentration factor were obtained in polyethylene glycol 1,500/sodium citrate and polyethylene glycol 6,000/sodium citrate systems, respectively. Moreover, in selected ATPSs, the effect of tie-line length and volume ratio on partitioning parameters of Acid blue 9 was evaluated in order to determine conditions at which the highest possible removal of textile dye from wastewater could be achieved.

Keywords:

• Textile dye
• Wastewater
• Partitioning
• Aqueous two-phase system

Acknowledgment

Financial support from the Ministry of Science and Technological Development of the Republic of Serbia (Grant No. III 43005) is gratefully acknowledged.

Notes

Presented at the International Conference on Desalination for the Environment, Clean Water and Energy, European Desalination Society, 23–26 April 2012, Barcelona, Spain