REMOVAL OF BASIC DYES FROM WASTEWATER THROUGH BIOADSORBENT
Dr. Namita Bhardwaj* and Heeralal Devangan
ABSTRACT
Dyes release as waste water effluent from various industrial outlets, such as paper, food colouring, cosmetics, leather, pharmaceutical, dyeing, printing, carpet industries etc. These dyes are highly toxic and even carcinogenic hence these are needed to remove from the water effluents before they are discharged into water bodies. Dyes are stable to light and not biologically degradable; they are resistant to aerobic digestion and signify one of the difficult groups to be removed from the industrial wastewater. But, the dye-house effluents are very difficult to treat satisfactorily because they are highly variable in composition. Therefore, bioadsorption became one of the most effective methods to remove colour from textile wastewater. Groundnut peels and cow dung mixture were used as a adsorbent and uptake of methylene blue was evaluated with different parameters like contact time, sorbent dose, and temperature. Results shows that sorption process is time, temperature and concentration dependant. Thus sulphonated mixture of biomass of groundnut peels and cow dung is a low cost and easily available good sorbent for the removal of methylene blue from wastewater.
Keywords: bioadsorption, effluents. Dyes. Waste water, methylene blue.
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