Removal of dyes from textile wastewater using treated aspergillus tamarii biomass in batch and column reactor

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Dyes used in textile industries have a complex chemical structure; chemical and biological stability making them resistant to degradation process. They pose great threats to aquatic life and environmental safety and affect human health severely even in very small amounts when they discharged in water streams without treatments. There are many methods for decolorizing wastewater but they lake the ability to deal with all types of dyes. Recently, dye biosorption through biological means has gained momentum over other chemical and physical means as these are cheap and can be applied to a wide range of dyes. This investigation focused on the enhancement of the biosorption capability of Aspergillus tamarii biomass using combined chemical and physical methods; The optimum treatment was immobilization of Aspergillus tamarii biomass with gamma irradiation dose 10 kGy and 5% formaldehyde on loofa sponge in batch and packed bed column reactor; The residual dye concentration was 16.29 mg/l in batch system after 12 hrs and 22.5 mg/l in reactor mode using real textile dye effluent from one of textile dye facilities in Shobra El Khema, Cairo, Egypt, composed of three different dyes at concentration of 150 mg/l in both experiments. The experimental data fit both Langmuir and Freundlich adsorption isotherm. © IDOSI Publications, 2012.

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