Removal of Lead,Copper,Zinc and Cadmium from Water Using Phosphate Rock |
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作者单位: | [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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摘 要: | Removal of Pb2 ,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 |
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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Abstract: | Removal of Pb2 ,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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Keywords: | heavy metal ions phosphate rock sorption |
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