Acid‐activated spent bleaching earth as a sorbent for chromium (vi) in aqueous solution
Spent bleaching earth, an industrial waste produced after the bleaching of crude palm oil, was investigated for its potential in removing Cr(VI) from aqueous solution. The earth was treated with different amounts of sulfuric acid and under different activation temperatures. Results show that the opt...
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Informa UK Limited
2003
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my.upm.eprints.1153702025-03-03T08:14:17Z http://psasir.upm.edu.my/id/eprint/115370/ Acid‐activated spent bleaching earth as a sorbent for chromium (vi) in aqueous solution Low, K.S. Lee, C.K. Lee, T.S. Spent bleaching earth, an industrial waste produced after the bleaching of crude palm oil, was investigated for its potential in removing Cr(VI) from aqueous solution. The earth was treated with different amounts of sulfuric acid and under different activation temperatures. Results show that the optimum treatment process involved 10% sulfuric acid at 350° C. The effects of contact time, pH, initial concentration, sorbent dosage, temperature, sorption isotherms and the presence of other anions on its sorption capacity were studied. Isotherm data could be fitted into a modified Langmuir isotherm model implying monolayer coverage of Cr(VI) on acid activated spent bleaching earth. The maximum sorption capacity derived from the Langmuir isotherm was 21.2 mg g‐1. This value was compared with those of some other low cost sorbents. Studies of anion effect on the uptake of Cr(VI) on acid activated spent bleaching earth provided the following order of suppression: EDTA >PO43‐>SSO42‐ >NO3>Cl‐. Informa UK Limited 2003 Article PeerReviewed Low, K.S. and Lee, C.K. and Lee, T.S. (2003) Acid‐activated spent bleaching earth as a sorbent for chromium (vi) in aqueous solution. Environmental Technology, 24 (2). pp. 197-204. ISSN 0959-3330; eISSN: 1479-487X https://www.tandfonline.com/doi/abs/10.1080/09593330309385551 10.1080/09593330309385551 |
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Spent bleaching earth, an industrial waste produced after the bleaching of crude palm oil, was investigated for its potential in removing Cr(VI) from aqueous solution. The earth was treated with different amounts of sulfuric acid and under different activation temperatures. Results show that the optimum treatment process involved 10% sulfuric acid at 350° C. The effects of contact time, pH, initial concentration, sorbent dosage, temperature, sorption isotherms and the presence of other anions on its sorption capacity were studied. Isotherm data could be fitted into a modified Langmuir isotherm model implying monolayer coverage of Cr(VI) on acid activated spent bleaching earth. The maximum sorption capacity derived from the Langmuir isotherm was 21.2 mg g‐1. This value was compared with those of some other low cost sorbents. Studies of anion effect on the uptake of Cr(VI) on acid activated spent bleaching earth provided the following order of suppression: EDTA >PO43‐>SSO42‐ >NO3>Cl‐. |
| format |
Article |
| author |
Low, K.S. Lee, C.K. Lee, T.S. |
| spellingShingle |
Low, K.S. Lee, C.K. Lee, T.S. Acid‐activated spent bleaching earth as a sorbent for chromium (vi) in aqueous solution |
| author_facet |
Low, K.S. Lee, C.K. Lee, T.S. |
| author_sort |
Low, K.S. |
| title |
Acid‐activated spent bleaching earth as a sorbent for chromium (vi) in aqueous solution |
| title_short |
Acid‐activated spent bleaching earth as a sorbent for chromium (vi) in aqueous solution |
| title_full |
Acid‐activated spent bleaching earth as a sorbent for chromium (vi) in aqueous solution |
| title_fullStr |
Acid‐activated spent bleaching earth as a sorbent for chromium (vi) in aqueous solution |
| title_full_unstemmed |
Acid‐activated spent bleaching earth as a sorbent for chromium (vi) in aqueous solution |
| title_sort |
acid‐activated spent bleaching earth as a sorbent for chromium (vi) in aqueous solution |
| publisher |
Informa UK Limited |
| publishDate |
2003 |
| url |
http://psasir.upm.edu.my/id/eprint/115370/ https://www.tandfonline.com/doi/abs/10.1080/09593330309385551 |
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