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HONORS PROGRAM Acid-Base Properties of Pure Adsorbents of Synthetic Dyes Rada-Mayya Kostadinova 1. INTRODUCTION Dyes are synthetic, water-soluble and dispersible organic compounds, which cause coloration of pure water bodies when released to the surroundings. They are frequently utilized in industries such as dyestuff, fabrics, leather, plastic, plastics, paper, cosmetics etc., to color their merchandise and are invariably left from the industrial wastes. Synthetic dyes, suspended solids and dissolved organics are the primary toxic substances found in textile effluents. These substances can impact the chemical and physical properties of fresh water. Along with the undesirable colors of fabric effluents, some dyes may hamper to create toxic and carcinogens products1. Furthermore, the coloured effluents reduce light penetration and possibly prevent photosynthesis. Dyes also in very low concentrations affect the aquatic life and food chain2. Thus, the removal of dyes in the process or waste effluents becomes environmentally important. Due to the high degree of organics within these molecules and the equilibrium of modern dyes, conventional physicochemical and biological treatment methods are inefficient for their removal. Adsorption has been shown to be one of the most promising and extensively used methods for the removal of both inorganic and organic pollutants from contaminated water. Activated carbon is the most widely used adsorbent for this purpose since it has a high capacity for adsorption of organic matter and it is demonstrated to be effective in treating textile wastes3. However, in view of high cost and associated problems of regeneration, there is a constant search for alternate low-cost adsorbents. Such alternatives...