الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
The aims of this work are to investigate selected nano-adsorbent with various component and shapes for improvement of the biodegradation processes to enhance decolorization of dyes from wastewater. Various sources including fungal and bacterial species have applied to screen for effective sources for conditioning and optimization the biodegradation process of some dye pollutants. Four sources including two sediment samples from wastewater near textile indusial effluent from Kafr-Eldawar drain of dyes Company named n1 and O1. In addition to sand consortium and azotobacter sources. Three dyes including; methylene blue, tartrazine and Coomassie brilliant blue were used for screening the different bacterial sources for investigating the potential for biodegradation. The investigating processes includes primary screening flowed by a second experiment for conditioning the bacterial sources able of biodegrade the tested dyes. The second stage of this research work include the application of selected nano-adsorbent such as iron oxide magnetic nanoparticles, carbon nanotube, magnetic Fe3O4@CNT as well as Silica nanoparticles to investigate the possible enhancement of the dye biodegradation. The influence of the selected nano-adsorbent including; iron oxide magnetic nanoparticles, carbon nanotube, magnetic Fe3O4@CNT and silica nanoparticle on the biodegradation efficiency% of methylene blue was investigated using the four bacterial sources including source-n1, source-O1, sand consortium and Azotobacter . The enhancement in the biodegradation efficiency is noticed and compared with results of the fifth day of the second conditioning experiments. Among the tested nano-adsorbents, carbon nanotube and silica showed positive effect for enhancing the methylene blue biodegradation efficiency% to reach more than 90% The influence of the selected nano-adsorbent including; iron oxide magnetic nanoparticles, carbon nanotube, magnetic Fe3O4@CNT and silica nanoparticle on the biodegradation efficiency% of tartrazine was investigated using the four bacterial sources including source-n1, source-O1, sand consortium and azotobacter . There is no enhancement in the biodegradation efficiency% was noticed for the all tested bacterial sources, during applying the selected nano-adsorbents V The influence of the selected nano-adsorbent including; iron oxide magnetic nanoparticles, carbon nanotube, magnetic Fe3O4@CNT and silica nanoparticle on the biodegradation efficiency% of Coomassie brilliant blue was investigated using the four bacterial sources including source-n1, source-O1, sand consortium and azotobacter . The enhancement in the biodegradation efficiency is noticed and compared with results of the fifth day of the second conditioning experiments. Among the tested nano-adsorbents, only the carbon nanotube showed positive effect for enhancing the biodegradation efficiency% to reach about 93 and 90% for the sand consortium and azotobacter , respectively. The prepared silica-based nano-adsorbent was applied to enhance the biodegradation of methylene blue using consortia from sand samples and Azotobacter. The conditions for biodegradation were adapted twice to confirm the biodegradation activities, which had biodegradation efficiencies of approximately 76 and 78% for the sand consortium and Azotobacter, respectively. The biodegradation efficiencies were 99 and 99% for the sand consortium and Azotobacter, respectively, when the silica-based nano-adsorbent was applied. Silica-based nano-adsorbents played an important role in enhancing the biodegradation efficiency by collecting bacterial cells and dye molecules through adsorption. The biodegradation process reached a maximum efficiency at a temperature of 30 °C when shaken at 150 rpm. In addition, the rate of the biodegradation of MB was found to follow a first-order kinetic model. The application of the bacterial biodegradation process for removal of methylene blue and coomassie brilliant blue dyes was enhanced via carbon nanotubes which act as support to collect the bacteria and facilitate their growth and consumption of tested dye. The water treatment process based on the biodegradation process established in this work, become at its maximum biodegradation efficiency% at 30°C, under shaking condition at 150 rpm. The carbon nanotubes-based biodegradation enhancement exhibited removal efficiencies% for coomassie brilliant blue of 95% and 93% for the sand consortium and azotobacter , respectively, while it was 96% and 99% for methylene blue biodegradation using sand consortium and azotobacter , respectively. VI Contents Topics Page.