Decolourisation of textile dyeing Wastewater by modified solar Photo-Fenton Oxidation
Author(s)- Ganesan.R, Thanasekaran.K
In a laboratory study, decolourisation of real textile dyeing wastewater by modified solar photo-Fenton (Steel scrap/ H2O2 ) process under irradiation with sunlight was examined. Batch experiments were conducted to determine optimal operating conditions .The optimal doses of H2O2 and steel scrap were 15 mL/L and 1 g/L, respectively at pH 3.Colour removal of 89% was obtained under optimum conditions. These results suggest that, the modified solar photo-Fenton process proved to be efficient for decolourisation of the real textile dyeing wastewater. A simplified mechanism of hydroxyl radical production in the presence of steel scrap as a catalyst has been proposed. The morphologic analysis and mapping of the elementary composition of Steel scrap used as a catalyst was determined by scanning electronic microscopy.
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In this study, we have carried out the course of study on proteolytic treatment of fabric surface cotton based on Halophilic bacterial biopolymers. The halophilic bacteria Vibrio harveyi, Halomonas sp, Vibrio fluvialis, and Halobacterium sp., strains were isolated from soil samples collected from Pichavaram Mangrove forest, India. The crude extract of the biopolymers were separated from the cell free supernatant using the 95% cold ethanol and dialyzed. This biopolymer were studied soluble in water and insoluble in any organic solvents tested; gelation occurred under alkaline conditions in the presence of divalent cations in which as CuSo4 gave the best result, including stabilizing effects on oil-water emulsions with a variety of vegetable oils as well as flocculating effects against activated carbon powder after 5min and the highest flocculating activity was observed in biopolymer no-2. However, biopolymer no-1, 3 and 4 showed poor flocculating effects. Moreover, the proteins were isolated by protein electrophoresis and Laemmli assay. The biopolymers were applied to the textile fabric after dye bath. Biopolymer no.2 and 3 had good proteolytic activity and gave smoothness to the applied fabric. Biopolymer no. 1 and 4 gave not so much smoothness than the biopolymer no. 2 and 3.
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