Autor(es):
Sartaj, Seema ; Ali, Nisar ; Khan, Adnan ; Malik, Sumeet ; Bilal, Muhammad ; Khan, Menhad ; Ali, Nauman ; Hussain, Sajjad ; Khan, Hammad ; Khan, Sabir [UNESP]
Data: 2020
Identificador Persistente: http://hdl.handle.net/11449/200619
Origem: Oasisbr
Assunto(s): Allura red; Electrochemical degradation; Environmental pollution; Erythrosine; Optimization; Photolysis; Allura red; Allura red; Electrochemical degradation; Electrochemical degradation; Environmental pollution; Environmental pollution; Erythrosine; Erythrosine; Optimization; Optimization; Photolysis; Photolysis
Descrição
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Wastewater containing dyes is considered as the top-priority pollutant when discharged into the environment. Herein, we report for the applicability of 254 nm ultraviolet light and electrochemical process using a titanium ruthenium oxide anode for the degradation of Allura red and erythrosine dyes. During the photolytic process, 95% of Allura red dye (50 ppm) was removed after 1 h at pH 12 and 35 °C, whereas 90% color removal of erythrosine dye (50 ppm) was achieved after 6 h of treatment at pH 6.0 and 30 °C. On the other hand, 99.60% of Allura red dye (200 ppm) was removed within 5 min by the electrochemical process applying a current density (5 mA cmr2) at pH 5.0 and 0.1 mol L~1 sodium chloride (NaCl) electrolytic medium. Similarly, 99.61% of erythrosine dye (50 ppm) degradation was achieved after 10 min at a current density of 8 mA cmr2, pH 6.0, and 0.1 mol L~1 of NaCl electrolyte. The minimum energy consumption value for Allura red and erythrosine dyes (0.196 and 0.941 kWh m 3, respectively) was calculated at optimum current densities of 5 and 8 mA cmr2 The resultsdemonstrated that the electrochemical process is more efficient at removing dyes in a shorter time than the photolytic process since it generates powerful oxidants like the chlorine molecule, hypochlorous acid, and hypochlorite on the surface of the anode and initiates a chain reaction to oxidize the dyes molecules.
Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province National and Local Joint Engineering Research Center for Deep Utilization Technology of Rock-salt Resource Faculty of Chemical Engineering Huaiyin Institute of Technology
Institute of Chemical Sciences University of Peshawar
School of Life Science and Food Engineering Huaiyin Institute of Technology
Faculty of Materials and Chemical Engineering GIK Institute of Engineering Sciences and Technology
Department of Analytical Chemistry Institute of Chemistry State University of São Paulo (UNESP)
Department of Analytical Chemistry Institute of Chemistry State University of São Paulo (UNESP)
