Chromium Removal from Tannery Wastewater by Electrocoagulation: Optimization and Sludge Characterization
The treatment of tannery effluent is of great interest as it contains a complex mixture of pollutants, primarily chromium. The disposal of this wastewater can have adverse effects on the environment and aquatic life, which is an emerging problem for the environment. In this work, electrocoagulation...
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| Veröffentlicht in: | Water (Basel) 2020-05, Vol.12 (5), p.1374 |
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| creator | Genawi, Nahid M Ibrahim, Mohamed H Naas, Muftah H. El Alshaik, Awad E |
| description | The treatment of tannery effluent is of great interest as it contains a complex mixture of pollutants, primarily chromium. The disposal of this wastewater can have adverse effects on the environment and aquatic life, which is an emerging problem for the environment. In this work, electrocoagulation is used to remove chromium from real tannery wastewater, focusing on performance optimization and sludge characterization. Electrocoagulation experiments were conducted using an electrochemical cell with iron electrodes immersed in a specific volume of tannery wastewater. Operating parameters, such as the initial chromium concentration, pH and current density as well as power consumption were evaluated to determine optimum chromium removal. The optimization was performed using Response Surface Methodology combined with central composite design. Analysis of variance (ANOVA) was used to determine the response, residual, probability, 3D surface and contour plots. The maximum chromium removal was 100% at the optimum values of 13 mA/cm2, 7 and 750 ppm for current density, pH and concentration, respectively. |
| doi_str_mv | 10.3390/w12051374 |
| format | Article |
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El ; Alshaik, Awad E</creator><creatorcontrib>Genawi, Nahid M ; Ibrahim, Mohamed H ; Naas, Muftah H. El ; Alshaik, Awad E</creatorcontrib><description>The treatment of tannery effluent is of great interest as it contains a complex mixture of pollutants, primarily chromium. The disposal of this wastewater can have adverse effects on the environment and aquatic life, which is an emerging problem for the environment. In this work, electrocoagulation is used to remove chromium from real tannery wastewater, focusing on performance optimization and sludge characterization. Electrocoagulation experiments were conducted using an electrochemical cell with iron electrodes immersed in a specific volume of tannery wastewater. Operating parameters, such as the initial chromium concentration, pH and current density as well as power consumption were evaluated to determine optimum chromium removal. The optimization was performed using Response Surface Methodology combined with central composite design. Analysis of variance (ANOVA) was used to determine the response, residual, probability, 3D surface and contour plots. The maximum chromium removal was 100% at the optimum values of 13 mA/cm2, 7 and 750 ppm for current density, pH and concentration, respectively.</description><identifier>ISSN: 2073-4441</identifier><identifier>EISSN: 2073-4441</identifier><identifier>DOI: 10.3390/w12051374</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Aluminum ; Aquatic environment ; Aquatic organisms ; Chemical oxygen demand ; Chromium ; Chromium (Metal) ; Current density ; Design of experiments ; Efficiency ; Effluents ; Electrochemical cells ; Electrochemistry ; Electrocoagulation ; Electrodes ; Environmental aspects ; Environmental effects ; Methods ; Optimization ; Pollutants ; Power consumption ; Power supply ; Raw materials ; Response surface methodology ; Sewage treatment ; Sludge ; Sludge treatment ; Specific volume ; Tannery wastes ; Tanning (Leather finishing) ; Textile industry wastewaters ; Variance analysis ; Waste management ; Wastewater ; Wastewater disposal ; Wastewater treatment</subject><ispartof>Water (Basel), 2020-05, Vol.12 (5), p.1374</ispartof><rights>COPYRIGHT 2020 MDPI AG</rights><rights>2020. 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The optimization was performed using Response Surface Methodology combined with central composite design. Analysis of variance (ANOVA) was used to determine the response, residual, probability, 3D surface and contour plots. 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Operating parameters, such as the initial chromium concentration, pH and current density as well as power consumption were evaluated to determine optimum chromium removal. The optimization was performed using Response Surface Methodology combined with central composite design. Analysis of variance (ANOVA) was used to determine the response, residual, probability, 3D surface and contour plots. The maximum chromium removal was 100% at the optimum values of 13 mA/cm2, 7 and 750 ppm for current density, pH and concentration, respectively.</abstract><cop>Basel</cop><pub>MDPI AG</pub><doi>10.3390/w12051374</doi><orcidid>https://orcid.org/0000-0002-6164-1421</orcidid><oa>free_for_read</oa></addata></record> |
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| source | MDPI - Multidisciplinary Digital Publishing Institute; EZB-FREE-00999 freely available EZB journals |
| subjects | Aluminum Aquatic environment Aquatic organisms Chemical oxygen demand Chromium Chromium (Metal) Current density Design of experiments Efficiency Effluents Electrochemical cells Electrochemistry Electrocoagulation Electrodes Environmental aspects Environmental effects Methods Optimization Pollutants Power consumption Power supply Raw materials Response surface methodology Sewage treatment Sludge Sludge treatment Specific volume Tannery wastes Tanning (Leather finishing) Textile industry wastewaters Variance analysis Waste management Wastewater Wastewater disposal Wastewater treatment |
| title | Chromium Removal from Tannery Wastewater by Electrocoagulation: Optimization and Sludge Characterization |
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