Rapid and Continuous Extraction of Methyl Red from Wastewater Using Counter Current Chromatography

Nasrin Adli,Hossein Salar Amoli,Zinolabedin Bashiri Sadr,Moharam Moharamzadeh,Azam Azimvand

doi:10.4236/msa.2016.76028

Abstract

A new prototype and simple low speed counter current chromatography (LSCCC) has been fabricated and a laboratory work has been carried out for rapid and continuous removal of methyl red from wastewater using xylene as an extractant. The distribution ratio (D) and percentage of recoveries were calculated. The optimum concentration for extraction of methyl red was in the range of 2 × 10-4 to 8 × 10-4 mol·L-1. Maximum extraction achieved at pH range of 2 to 4.5. Various dye concentrations and solvent effects were studied to optimized conditions. It was shown that when the ratio of the organic phase to aqueous phase increased to more than 3:1, the striping efficiency decreased sharply. The experiments were carried out for 5 times and the highest extraction achieved was 99.8 per cent by two-solvent system LSCCC in just 5 minutes. Real wastewater samples were analyzed and the efficiency of the technique was compared with liquid-liquid extraction (LLE). In practice it was shown that although both techniques are rapid, the efficiency of the LSCCC is much better than LLE.

Highlights

It is estimated that more than 100,000 commercially available dyes with over 7 × 105 tons of dyestuff are producedHow to cite this paper: Adli, N., Azimvand, A., Sadr, Z.B., Moharamzadeh, M. and Amoli, H.S. (2016) Rapid and Continuous Extraction of Methyl Red from Wastewater Using Counter Current Chromatography
In order to cope with these problems, we have developed a short column, low speed CCC (LSCCC), which causes rapid circular motion of two solvent phases in cylindrical compartment
Because of its less toxic effect compared to benzene and toluene and it’s more effective than hexane to study the extraction of methyl red from aqueous solution, xylene was used as an extractant by a new method called Low Speed CCC

Summary

Introduction

It is estimated that more than 100,000 commercially available dyes with over 7 × 105 tons of dyestuff are produced. Recent literature is an effective and attractive process for the decontamination of the dye-containing effluents and many researchers have adopted the adsorption approaches [24] [25] The other methods such as coagulation and flocculation [26]-[28] and other materials such as activated carbon are used for the removal of methyl red from simulated wastewater [29]-[31]. In the present work the extraction of anionic dyes namely methyl red from wastewater solutions was carried out by Low Speed Counter Current Chromatography (LSCCC). This is a modern technique for the separation and purification of the samples [32]-[36]. The method was compared with data obtained at the same conditions with liquid-liquid extraction (LLE) method

Materials and Apparatus

LSCCC Instrument

Liquidé-Liquide Extraction Procédure

Results and Discussion

Conclusions