Isfahan University of Medical Sciences

Science Communicator Platform

Stay connected! Follow us on X network (Twitter):
Share this content! On (X network) By
Combination of Hydrodynamic Cavitation With Oxidants for Efficient Treatment of Synthetic and Real Textile Wastewater Publisher



Khajeh M1, 2 ; Taheri E1, 3 ; Amin MM1, 3 ; Fatehizadeh A1, 3 ; Bedia J4
Authors
Show Affiliations
Authors Affiliations
  1. 1. Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
  2. 2. Student Research Committee, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
  3. 3. Environment Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
  4. 4. Chemical Engineering Department, Facultad de Ciencias, Universidad Autonoma de Madrid, Campus Cantoblanco, Madrid, E-28049, Spain

Source: Journal of Water Process Engineering Published:2022


Abstract

In this study, the degradation of direct red 89 (DR89) dye from synthetic wastewater was assessed by lab-scaled hydrodynamic cavitation (HC) combined with different oxidants such as periodate (PI), persulfate (PS), and oxalic acid (OA). The degradation tests were carried out by combining the three oxidants in the absence of HC, and using HC with only one of the oxidants (HC/OA, HC/PS, and HC/PI) or with all combined (HC/PS/OA/PI). In all processes, the degradation constants followed first-order reaction kinetics, being the highest one that of the HC/PS/OA/PI process, equal to 2.01 × 10−1 min−1. The degradation of DR89 was affected by pH, initial dye concentration, and reaction time. The degradation efficiency increased when pH decreased obtaining the best results at pH 3.0 due to favorable conditions for the generation and persistence of radical species. The degradation of the dye improved with increasing dose of OA, PS and PI. The best results were achieved using dosages of OA, PS, and PI of 100.0, 125.0, and 150.0 mg L−1, respectively. The quenching experiments revealed the presence of [rad]OH, SO4[rad]−, IO3[rad], O2[rad]–, and 1O2 in the HC/PS/OA/PI process, while [rad]OH, SO4[rad]− and IO3[rad] were the dominant responsible radicals. The rate constants of the individual processes were used to calculate the value of the synergetic coefficient of HC/PS/OA/PI process. At the optimum conditions, the calculated synergetic coefficient was 15.39. The effectiveness of the HC/PS/OA/PI process in the removal of color and COD from real textile wastewater was also investigated and exhibited the 96.23 ± 1.92 % and 93.84 ± 0.94 % reduction of color and COD after 70 min reaction time, respectively. The results showed that the combined process can be a useful technology for the treatment of textile wastewater. © 2022 The Authors
Experts (# of related papers)
Other Related Docs
24. Decolorization and Biological Degradation of Azo Dye Reactive Red2 by Anaerobic/Aerobic Sequential Process, Iranian Journal of Environmental Health Science and Engineering (2009)
26. Application of Coagulation Process Reactive Blue 19 Dye Removal From Textile Industry Wastewater, International Journal of Environmental Health Engineering (2012)
27. Intensification of Fenton Process by Ultrasonic Waves in Humic Acid Degradation From Aqueous Solutions, International Journal of Environmental Health Engineering (2023)
35. Decolorization of Synthetic Wastewaters by Nickel Oxide Nanoparticle, International Journal of Environmental Health Engineering (2012)
40. Removal of Acid Red 14 by Pumice Stone As a Low Cost Adsorbent: Kinetic and Equilibrium Study, Iranian Journal of Chemistry and Chemical Engineering (2012)
41. Decolorization of Direct Poly Azo Dye With Nanophotocatalytic Uv/Nio Process, International Journal of Environmental Health Engineering (2012)