The present study aimed to assess and compare the ability to remediate synthetic textile and industrial wastewaters by Fenton treatment, a biological system and sequential treatments using Aspergillus niger (A. niger). All studied treatments were found to be effective in decolorization of the effluents under study. Fenton treatment followed by A. niger showed excellent potential for the maximum decolorization of the synthetic and industrial effluents under study. The effectiveness of sequential treatment was evaluated by water quality parameters such as total organic carbon (TOC), Biological Oxygen Demand (BOD5) and Chemical Oxygen Demand (COD) before and after each treatment. The results indicated that A. niger is an effective candidate for detoxification of textile wastewaters.
Our current study deals with the green synthesis of copper nanoparticles using extract of Labeo rohita fish scales. There is no need to add any external reducing and stabilizing agents as the gelatin found in fish scale extract possesses plenty of reducing and stabilizing properties. The synthesized copper nanoparticles (Cu-NPs) were characterized by Zeita sizer and SEM. Cu-NPs were applied to decolorize Reactive Blue 19 dye. Different experimental conditions like concentration of reactive Blue 19 dye, concentration of copper nanoparticles, pH and temperature were optimized. The degrading potential of copper nanoparticles increased their applicability for the decolorization of Reactive Blue 19 dye. Reactive Blue 19 dye was maximum decolorized (90.18%) at aconc. of 0.03%, 4 mg Cu-NPs, pH 10 at 50ºC. The effectiveness of the method was evaluated by water quality assurance parameters such as total organic carbon (TOC) and chemical oxygen demand (COD). The reaction products were characterized by FTIR spectral studies.
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