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Document Type |
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Article In Journal |
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Document Title |
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Removal of heavy metals from aqueous solutions by multi-walled carbon nanotubes modified with 8-hydroxyquinoline إزالة المعادن الثقيلة من المحاليل المائية بواسطة الأنابيب النانومترية الكربونية متعددة الجدران والمعدلة مع هيدروكسي قينون-8 |
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Subject |
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Environmental Science |
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Document Language |
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English |
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Abstract |
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Multi-walled carbon nanotubes (MWCNTs) were modified with 8-hydroxyquinoline and used for the
removal of Cu(II), Pb(II), Cd(II) and Zn(II) from aqueous solutions. Fourier transform infrared spectroscopy,
and X-ray photoelectron spectroscopy showed the successful modification of the MWCNTs
with 8-hydroxyquinoline. The adsorption parameters, such as the amount of MWCNTs used, temperature,
pH, ionic strength, metal ion concentration, and competition among metal ions, were studied and
optimized. The results showed that most of the metals were removed from aqueous solution using 250 mg
of MWCNTs at pH 7.0 and 298 K in 0.01 M KNO3 after 10 min of adsorption. The results also showed that
the competition between the target heavy metals was in the order of Cu(II) > Pb(II)
≈
Zn(II) > Cd(II) for %
adsorption. The recycling, desorption and regeneration of the MWCNTs were evaluated and the results
demonstrated that most of the metal ions desorbed at pH values lower than 2.0, and the MWCNTs could be
used for up to three cycles of adsorption/desorption without losing efficiency. The pristine and modified
MWCNTs were used to remove the target heavy metals from two real samples collected from the Red Sea
and a wastewater treatment plant. Both pristine and modified MWCNTs were capable of removing the
heavy metals from the real samples. In general, the modification of MWCNTs with 8-hydroxyquinoline
significantly enhanced the removal of heavy metals from aqueous solution. |
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ISSN |
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1385-8947 |
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Journal Name |
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Chemical Engineering Journal |
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Volume |
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181 |
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Issue Number |
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0 |
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Publishing Year |
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1433 AH
2012 AD |
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Article Type |
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Article |
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Added Date |
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Saturday, September 15, 2012 |
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Researchers
| سامية كوسا | Kosa, Samia | Researcher | | |
| غالية الزهراني | Al-Zhrani, Ghalia | Researcher | | |
| محمد عادل سلام | Salam, Mohamed Abdel | Researcher | | masalam16@hotmail.com |
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Files
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34172.pdf
| pdf | Removal of heavy metals from aqueous solutions by multi-walled carbon
nanotubes modified with 8-hydroxyquinoline |
|