| Removal of Lead, Copper, Zinc and Cadmium from Water Using Phosphate Rock |
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| 作者姓名： | Alessia CORAMI Silvano MIGNARDI Vincenzo FERRINI |
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| 作者单位： | Department of Earth Sciences, University “La Sapienza”, P.le A. Moro 5, 00185 Rome, Italy;Department of Earth Sciences, University “La Sapienza”, P.le A. Moro 5, 00185 Rome, Italy; IGG-CNR (Sezione di Roma), c/o Department of Earth Sciences, University “La Sapienza”, P.le A. Moro 5, 00185 Rome, Italy;Department of Earth Sciences, University “La Sapienza”, P.le A. Moro 5, 00185 Rome, Italy; IGG-CNR (Sezione di Roma), c/o Department of Earth Sciences, University “La Sapienza”, P.le A. Moro 5, 00185 Rome, Italy |
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| 基金项目： | This study corresponds partly to the Ph.D. research of A. Corami. Financial support was partially from the CNR-IGG-Roman Branch. |
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| 摘 要： | Removal of Pb^2＋, Cu^2＋, Zn^2＋ and Cd^2＋ from aqueous solutions by sorption on a natural phosphate rock （FAP） was investigated. The effects of the contact time and initial metal concentration were examined in the batch method. The percentage sorption of heavy metals from solution ranges generally between 50% and 99%. The amount of sorbed metal ions follows the order Cu〉Pb〉Cd〉Zn. Heavy metal immobilization was attributed to both surface complexation of metal ions on the surface of FAP grains and partial dissolution and precipitation of a heavy metal-containing phosphate. The very low desorption ratio of heavy metals further supports the effectiveness of FAP as an alternative and low-cost material to remove toxic Pb^2＋, Cu^2＋, Zn^2＋ and Cd^2＋ from polluted waters.
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| 关 键 词： | 重金属离子 磷盐岩 吸附作用 铜 |
| 收稿时间： | 7/9/2007 12:00:00 AM |
| 修稿时间： | 2008/1/10 0:00:00 |
Removal of Lead,Copper, Zinc and Cadmium from Water Using Phosphate Rock |
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| Authors: | Alessia CORAMI ;Silvano MIGNARDI ;Vincenzo FERRINI |
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| Institution: | 1. Department of Earth Sciences, University “La Sapienza”, P.le A. Moro 5, 00185 Rome, Italy;2. IGG‐CNR (Sezione di Roma), c/o Department of Earth Sciences, University “La Sapienza”, P.le A. Moro 5,00185 Rome, Italy |
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| Abstract: | Abstract: Removal of Pb2+, Cu2+, Zn2+and Cd2+from aqueous solutions by sorption on a natural phosphate rock (FAP) was investigated. The effects of the contact time and initial metal concentration were examined in the batch method. The percentage sorption of heavy metals from solution ranges generally between 50% and 99%. The amount of sorbed metal ions follows the order Cu>Pb>Cd>Zn. Heavy metal immobilization was attributed to both surface complexation of metal ions on the surface of FAP grains and partial dissolution and precipitation of a heavy metal‐containing phosphate. The very low desorption ratio of heavy metals further supports the effectiveness of FAP as an alternative and low‐cost material to remove toxic Pb2+, Cu2+, Zn2+and Cd2+from polluted waters. |
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| Keywords: | heavy metal ions phosphate rock sorption |
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