الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Industrial development is generally associated with the increase in wastewater discharge of effluents loaded with organic and inorganic pollutants. The elimination of hazardous pollutants from wastewater becomes a challenge. The conventional technologies for removal of organic pollutants do not solve the problem, since they are based on transfer from one phase to another, leaving pollution problem solution for further generation.
Due to the development in industry in Egypt and the Arabian countries, most of the industrial wastewater contains very toxic organic compounds, which are not biodegradable and could not be treated with the traditional techniques. Due to their environmental impact, this waste requires treatment before being disposed.
Dyes are major contaminants of aquatic ecosystems and have serious consequences for the environment and human health. Textile dyes are common organic pollutants in industrial wastewater which must be removed from industrial effluents before discharging to the environment. Malachite green dye ( MG ) and Xylenol orange dye ( XO ) are two clear model examples of textile dyes which represent environmental hazards of organic pollutants.
The study was aiming to investigate the ability of nanocomposite for the decontamination of some of such toxic dyes in industrial wastewater effluents via adsorption technique. Furthermore, the isotherm and kinetics of the adsorption must be evaluated, and parameters of the thermodynamic for the adsorption mechanism must be calculated. The extraction of Malachite green (MG) and Xylenol orange (XO) from water solutions was achieved in this study by modifying chitosan to create a high-performance nanocomposite as an adsorbent. By dissolving chitosan in an acetic acid solution, a chitosan/iron oxide/bentonite nanocomposite was formed, then the solution was magnetically stirred, after that ferric chloride was added to filtered chitosan solution with constant stirring till reddish brown color.