Recovery of Chromium (III) from Tannery wastewater
Three aqueous oxidants, Hydrogen peroxide, Sodium Hypochlorite and Calcium Hypochlorite were employed independently in oxidizing Chromium (III) containing tannery wastewaters to soluble chromate (CrO42-) under alkaline conditions. The amount of chromate recovered was determined via spectrophotometry...
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| Format: | Article |
| Language: | English |
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Joint Coordination Centre of the World Bank assisted National Agricultural Research Programme (NARP)
2004-03-01
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| Series: | Journal of Applied Sciences and Environmental Management |
| Online Access: | https://www.ajol.info/index.php/jasem/article/view/17204 |
| _version_ | 1827296884526415872 |
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| author | M. ALI AWAN M.A. BAIG JAVED IQBAL M.R. ASLAM nAVEED IJAZ |
| author_facet | M. ALI AWAN M.A. BAIG JAVED IQBAL M.R. ASLAM nAVEED IJAZ |
| author_sort | M. ALI AWAN |
| collection | DOAJ |
| description | Three aqueous oxidants, Hydrogen peroxide, Sodium Hypochlorite and Calcium Hypochlorite were employed independently in oxidizing Chromium (III) containing tannery wastewaters to soluble chromate (CrO42-) under alkaline conditions. The amount of chromate recovered was determined via spectrophotometry. Hydrogen peroxide was potentially a suitable oxidant as it could recover chromate (CrO42-) up to 98% (from synthetic Cr3+ solution) and 88% (from effluent I). The percentage recoveries by the hypochlorites were lower than those by hydrogen peroxide i.e. for NaOCl the recoveries were up to 94% (from synthetic Cr3+ solution) and 67% (from effluent I), similarly for Ca(OCl)2 90% (from synthetic Cr3+ solution) and 49% (from effluent I). For all three oxidants complete (100%) recovery could not be achieved despite different experimental conditions (temperatures and oxidation time). The results clearly indicate that hydrogen peroxide is the most efficient among the three oxidants.
Journal of Applied Sciences and Environmental Management Vol. 7(2) 2003: 5-8 |
| first_indexed | 2024-04-24T14:47:18Z |
| format | Article |
| id | doaj.art-98662d9ea33e4e49b80b328330a657c1 |
| institution | Directory Open Access Journal |
| issn | 2659-1502 2659-1499 |
| language | English |
| last_indexed | 2024-04-24T14:47:18Z |
| publishDate | 2004-03-01 |
| publisher | Joint Coordination Centre of the World Bank assisted National Agricultural Research Programme (NARP) |
| record_format | Article |
| series | Journal of Applied Sciences and Environmental Management |
| spelling | doaj.art-98662d9ea33e4e49b80b328330a657c12024-04-02T19:55:04ZengJoint Coordination Centre of the World Bank assisted National Agricultural Research Programme (NARP)Journal of Applied Sciences and Environmental Management2659-15022659-14992004-03-017210.4314/jasem.v7i2.17204Recovery of Chromium (III) from Tannery wastewaterM. ALI AWAN0M.A. BAIG1JAVED IQBAL2M.R. ASLAM3nAVEED IJAZ4Institute of Environmental Science and Engineering (IESE), National University of Sciences & Technology (NUST), Rawalpindi, PakistanInstitute of Environmental Science and Engineering (IESE), National University of Sciences & Technology (NUST), Rawalpindi, PakistanPakistan Environmental Protection Agency (PEPA), Islamabad, PakistanInstitute of Environmental Science and Engineering (IESE), National University of Sciences & Technology (NUST), Rawalpindi, PakistanInstitute of Environmental Science and Engineering (IESE), National University of Sciences & Technology (NUST), Rawalpindi, PakistanThree aqueous oxidants, Hydrogen peroxide, Sodium Hypochlorite and Calcium Hypochlorite were employed independently in oxidizing Chromium (III) containing tannery wastewaters to soluble chromate (CrO42-) under alkaline conditions. The amount of chromate recovered was determined via spectrophotometry. Hydrogen peroxide was potentially a suitable oxidant as it could recover chromate (CrO42-) up to 98% (from synthetic Cr3+ solution) and 88% (from effluent I). The percentage recoveries by the hypochlorites were lower than those by hydrogen peroxide i.e. for NaOCl the recoveries were up to 94% (from synthetic Cr3+ solution) and 67% (from effluent I), similarly for Ca(OCl)2 90% (from synthetic Cr3+ solution) and 49% (from effluent I). For all three oxidants complete (100%) recovery could not be achieved despite different experimental conditions (temperatures and oxidation time). The results clearly indicate that hydrogen peroxide is the most efficient among the three oxidants. Journal of Applied Sciences and Environmental Management Vol. 7(2) 2003: 5-8https://www.ajol.info/index.php/jasem/article/view/17204 |
| spellingShingle | M. ALI AWAN M.A. BAIG JAVED IQBAL M.R. ASLAM nAVEED IJAZ Recovery of Chromium (III) from Tannery wastewater Journal of Applied Sciences and Environmental Management |
| title | Recovery of Chromium (III) from Tannery wastewater |
| title_full | Recovery of Chromium (III) from Tannery wastewater |
| title_fullStr | Recovery of Chromium (III) from Tannery wastewater |
| title_full_unstemmed | Recovery of Chromium (III) from Tannery wastewater |
| title_short | Recovery of Chromium (III) from Tannery wastewater |
| title_sort | recovery of chromium iii from tannery wastewater |
| url | https://www.ajol.info/index.php/jasem/article/view/17204 |
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