Using Lime to Remove Chromium from Tannery Factory Industrial Wastewater in Baghdad
A jar test experiment was conducted on tannery factory wastewater using hydrated lime Ca(OH)2 as a treatment material to remove chromium. The Saeeda factory in the Zaafaraniya area was the field for bringing models and applying this research content. The effluent characteristics were analyzed accor...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | Arabic |
| Published: |
Mustansiriyah University/College of Engineering
2025-01-01
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| Series: | Journal of Engineering and Sustainable Development |
| Subjects: | |
| Online Access: | https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1220 |
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| Summary: | A jar test experiment was conducted on tannery factory wastewater using hydrated lime Ca(OH)2 as a treatment material to remove chromium. The Saeeda factory in the Zaafaraniya area was the field for bringing models and applying this research content. The effluent characteristics were analyzed according to the American Public Health Association (APHA), the American Water Works Association (AWWA), and the Water Environment Federation (WEF). The results after analysis showed that calcium hydroxide (lime) removes chromium from industrial wastewater of tanning factories by up to 63.822%. The working conditions and parameters for performing the tests were based on axes, such as the gradient speed achieved at 480 s-1 for 30 minutes at 20°C. Experiments have shown that calcium concentration can remove chromium through multiple mechanisms. However, the presence of calcium also works together with chromium through the presence of chromium ions, which will lead to a reduction of calcium ions by 6.734%, but this does not mean risking adding chromium salts to achieve the best removal of chromium by hydrated lime.
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| ISSN: | 2520-0917 2520-0925 |