Sunday, 25 June 2006
Ponderosa (poster/exhibit) (John Ascuaga’s Nugget Casino Resort)
11

Determination of Disperse Azo Dyes in Industrial Textile Wastewater

Kenan Sezer and Hilmi Ibar. Trakya University, Edirne, Turkey

A great number of synthetic organic chemicals have been released to the environment via industrial activities. Dye classifications is based on the major functionality of the dye, the main classes being azo, anthraquinone, polymethine, phthalocyanine, sulphur, aryl-methane, stilbene and coumarine dyes [6]. In the present work qualitative and quantitative determination of synthetic azo dye compounds containing with complex mixtures in textile based industrial wastewater is proposed. Study has been carried out in a three different stage: 1. Sample handling 2. Extraction 3. Measuring. Samples were collected by traditional methods. Because of low solubility of dispersed dyestuff in water, for the extraction of analyte different techniques were applied i.e. liquid-liquid extractions, acid-base extractions and solid phase extractions. Better recovery was achieved with CH2CI2 liquid-liquid extraction 99.89%. Determinations were performed using analytical techniques: TLC, UV-VIS, and HPLC-UV. Disperse Red 73 called dyestuff was determined in wastewater both qualitative and quantitative.

References: 1. Riu J, Schönsee I, Barcelo D, Rafolos C. Determination of sulphontaed azo dyes in water and wastewater. Trends in Analytical Chemistry 1977; 16:405-19. 2. EPA Method 3510C. Separatory Funnel Liquid-Liquid Extraction. U.S CD- Environmental Protection Agency ROM, 1996. 3. EPA Method 8321. Solvent extractable nonvolatle compounds by HPLC/TS/TMS or HPLC-UV dedection U.S Environmental Protection Agency ROM, 1996. 4. Brown MA, DE VITO SC, Predicting azo dye toxicity. Critical Reviews. Environmental Science and Technology, 23/3: 249-324,1993. 5. Pinherto H.M, Touraud E.,Thomas O., Aromatic amines from azo dye reduction: status with emphasis on direct UV spectrophotometric dedection in textile indusry wastewaters. Dyes and Pigments 2004, vol 61,p 121-139. 6. Riu J, Barcelo D, Rafols C.,Determination of sulphonated azo dyes in water and wastewater. Trends in Analytical Chemistry, 1997, vol 16, 7.,p 405-419.


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