الفهرس | Only 14 pages are availabe for public view |
Abstract Water pollution by industrial effluents contain toxic organic compounds is a matter of great concern and has been pointed as one of the greatest problems of modern society which increased largely and reached alarming levels affecting the living creatures. Population explosion and the increased industrial activity result in consistent release of toxic effluent. One of the most popular organic pollutants in the world is dyes. Dyes are used widely in many industries such as paper, textile, plastic, leather and food industries. Effluents and wastewater discharge into rivers and natural streams from industries that use dyes poses certain hazards and environmental problems. Even minor quantity of dyes can colour huge water bodies which influences aesthetic merit and decrease light penetration needed for photosynthesis which effect on aquatic plants. Furthermore, many of dyes are toxic and carcinogenic which may eventually affect human. Among the various synthetic dyes, crystal violet (CV) and reactive red (RR) dyes have attracted much attention owing to their hazardous impacts on the ecosystem, in addition, they are mutagenic and carcinogenic. Thus there is an imperative necessity to develop a new method for CV and RR removal. Several treatment technologies are employed to remove organic pollutants from wastewater but the adsorption process still remains the best because of its universal nature, cheapness, simple design and easy operation. Many adsorbing materials have been used to remove dyes from aqueous solution such as natural clays. |