Volume No. 4 Issue No.: 1 Page No.: 62-69 July-Sept 2009

 

VERMICULITE MONO AND MIXED COLUMNS IN TREATING RAW TEXTILE AND DYE EFFLUENT

 

R.M. Jayabalakrishnan*, S.Mahimairaja and C.Udayasoorian

Department of Environmental Science,
Tamil Nadu Agricultural University, Coimbatore-641 003 (INDIA).

 

Received on : April 28, 2009

 

ABSTRACT

 

Column studies were carried out to evaluate the effectiveness of treating raw textile and dye effluent through mono and mixed columns (different grades) of vermiculite. It was found that mono column, colour was removed to a maximum extend of 61.0% in the first pore volume in treatment T1 (RVG2) which was the highest. But incase of mixed-column T2 (50% RVG2 + 50% RVG5) recorded the maximum color removal of 71.0% in the first pore volume upto 3rd pore volume there was a general decreasing trend of colour removal of 40% in all the columns. In case of removal of cations vermiculite column leaching units retained about 20 to 40% cations in the mono and mixed column experiments, which was evident from the decrease in the concentrations of these ions in the leachate of the first pore volume. The retention of colour and cation (Na, Ca and Mg) in general followed a common pattern for all the treatments either in mono (or) mixed columns, where in a maximum adsorption was noticed in the first pore volume and it followed a linear decreasing trend in second pore volume, but at the third pore volume, the leachate was with a meager differences with references to various pollutants when compared to that of the original pollutant load.

 

Keywords : Raw vermiculite grades, Exfoliated vermiculite grades, Textile and dye effluent, Pore volumes, Mono-columns, Mixed-columns.

 

 

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