Authors: G Kumaravel Dinesh Sambandam Anandan Thirugnanasambandam Sivasankar
Publish Date: 2016/01/20
Volume: 23, Issue: 20, Pages: 20100-20110
Abstract
The catalysts such as Fe Bi2O3 and Fedoped Bi2O3 were synthesized for the sonophotocatalytic treatment of synthetic dye and real textile wastewater The resultant catalysts were characterized for its size and uniform shape using xray diffractogram XRD and scanning electron microscopy SEM which signified the nanorod shape formed Bi2O3 The higher ultraviolet light absorbance capacity of the catalysts was also evident using diffuse reflectance spectroscopy DRS Initially the effect of conventional parameters such as initial pH gas bubbling argon oxygen air and nitrogen and oxidant addition H2O2 and peroxymonosulfate in the presence of sonolysis 22 and 37 kHz frequency and photolysis UVC light on 10 ppm Basic Brown 1 dye was studied The results showed that highest decolorization of 62 was attained for 3 g/L peroxymonosulfate under 37 kHz frequency sonolysis treatment Secondly with the catalyst study highest of 46 dye color removal was obtained with 4 g/L Fe under 37 kHz frequency sonolysis treatment The sonophotocatalytic treatment of dye with Fedoped Bi2O3 catalyst in combination with peroxymonosulfate showed highest color removal of 99 Finally the sonophotocatalytic treatment of real textile wastewater in the presence of 3 g/L Fedoped Bi2O3 and 6 g/L peroxymonosulfate reduced the total organic carbon TOC and chemical oxygen demand COD level to 77 and 91 respectively in 180 min The reported treatment process was found to treat the synthetic dye and real textile wastewater effectivelyThe authors would like to thank the Ministry of Environment and Forest MoEF Government of India for the financial funding of the project The authors also wish to thank the Environmental Engineering Laboratory Department of Civil Engineering NIT Tiruchirappalli for assisting in analyzing real textile wastewater characterization The comments and the valuable suggestions provided by the unanimous reviewers were greatly acknowledged
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