Dye Adsorption Capabilities of Diverse Clays and Natural Pigments

Abstract

As the control of water pollution has become an increasing importance in recent years, the use of physicochemical treatments such as membrane filtration, reverse osmosis, coagulation/flocculation and Fenton reagents are not economically feasible. Current study involves the adsorption of dyes on common adsorbents. Adsorption of dyes from waste water is estimated by spectrophotometric and calibration curve method. Various adsorbents are used including kaolin, titanium dioxide and activated charcoal in different concentration of methyl orange and azo dyes (blue, red and black). The adsorption of methyl orange is maximum in activated charcoal and minimum in kaolin adsorbent. The adsorption of azo (blue and red) dyes are maximum in titanium dioxide and minimum in activated charcoal adsorbent. Adsorption of dyes is validated by Langmuir curve. These adsorbents are economical for the water purification. The textile effluents have large quantities of azo dyes which cause water pollution problem this study suggests useful economical adsorbents to preserve water quality and minimize the chemical threat to life form.