الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Disposal of chromatic effluents from many industries into aquatic streams was considered as the main effects that lead to environmental system degradation as they include enormous number of intricate dyes .The presence of such dyes at high concentration triggers several borne disease and raising the BOD5 and COD of the obtaining water. In contrast, fly ash is a main by-product pollutant produced in coal-based industries. In this study, a chemically treated coal fly ash has been us¬ed as a cost-effective adsorptive material for removal of direct blue 78 dye (DB78) with commercial name (Tubantin blue GLL 300) from wastewater. Experimental work was divided into three parts. The first part includes the fly ash physico-chemical analysis; XRD, XRF, TGA, SEM, FTIR, surface area (SBET) and particles size analysis. Second part includes the determination of optimal conditions for direct dyes removal using synthetic wastewater. Third part include the application of the determined optimal conditions on industrial wastewater effluent using a pilot plant. The main purpose of this study was to investigate the effect of fly ash addition followed by sedimentation and filtration processes on the removal of COD, TDS and TSS. The change of pH value after the treatment process also had to be examined. The results indicated that, the chemical modification of fly ash using HCl causes a higher increase in BET surface from 9.6 m2/g to 60.4 m2/g and a higher decrease in pH from 11.5 to 9.7 respectively for raw and treated fly ash. And the best removal efficiencies were 88.7 %, 86.2 %, 76.3 %, 86.7 % and 74.9 % respectively for dye concentration, COD, BOD5, TDS and TSS.