Removal of Heavy-Metal Ions from Aqueous Solutions Using Activated Carbons: Effect of Adsorbent Surface Modification with Carbon Nanotubes
This paper describes the effect of surface nanomodification of porous adsorbents. Two commercial activated carbons (ACs), AG-5 and NWC coconut shell based, were used as adsorbents. The adsorbents were modified with carbon nanotubes (CNTs) by chemical vapour deposition. The CNTs were synthesized in t...
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2014-09-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263-6174.32.9.737 |
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| author | A. Burakov I. Romantsova A. Kucherova A. Tkachev |
| author_facet | A. Burakov I. Romantsova A. Kucherova A. Tkachev |
| author_sort | A. Burakov |
| collection | DOAJ |
| description | This paper describes the effect of surface nanomodification of porous adsorbents. Two commercial activated carbons (ACs), AG-5 and NWC coconut shell based, were used as adsorbents. The adsorbents were modified with carbon nanotubes (CNTs) by chemical vapour deposition. The CNTs were synthesized in the presence of a metal-oxide catalyst prepared using a citrate solgel method. The concentration of metal ions was evaluated by a spectrophotometric method. Experimental results show that the nanomodification of ACs increased their equilibrium adsorption of heavy metals (Ni 2+ and Co 2+ ) by 10–30%. Besides, the adsorption behaviour of these metal ions on the standard and nanomodified ACs was determined based on adsorption isotherms. A theoretical description of the adsorption mechanism is presented, and equilibrium constants were calculated. Experimental data on the adsorption of the heavy-metal ions on the nanomodified carbons were successfully fitted to the Langmuir and Freundlich models. |
| format | Article |
| id | doaj-art-72e9b1dd3d204a5abfe5f2bc4fc5e69e |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2014-09-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-72e9b1dd3d204a5abfe5f2bc4fc5e69e2025-01-02T22:37:59ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382014-09-013210.1260/0263-6174.32.9.737Removal of Heavy-Metal Ions from Aqueous Solutions Using Activated Carbons: Effect of Adsorbent Surface Modification with Carbon NanotubesA. BurakovI. RomantsovaA. KucherovaA. TkachevThis paper describes the effect of surface nanomodification of porous adsorbents. Two commercial activated carbons (ACs), AG-5 and NWC coconut shell based, were used as adsorbents. The adsorbents were modified with carbon nanotubes (CNTs) by chemical vapour deposition. The CNTs were synthesized in the presence of a metal-oxide catalyst prepared using a citrate solgel method. The concentration of metal ions was evaluated by a spectrophotometric method. Experimental results show that the nanomodification of ACs increased their equilibrium adsorption of heavy metals (Ni 2+ and Co 2+ ) by 10–30%. Besides, the adsorption behaviour of these metal ions on the standard and nanomodified ACs was determined based on adsorption isotherms. A theoretical description of the adsorption mechanism is presented, and equilibrium constants were calculated. Experimental data on the adsorption of the heavy-metal ions on the nanomodified carbons were successfully fitted to the Langmuir and Freundlich models.https://doi.org/10.1260/0263-6174.32.9.737 |
| spellingShingle | A. Burakov I. Romantsova A. Kucherova A. Tkachev Removal of Heavy-Metal Ions from Aqueous Solutions Using Activated Carbons: Effect of Adsorbent Surface Modification with Carbon Nanotubes Adsorption Science & Technology |
| title | Removal of Heavy-Metal Ions from Aqueous Solutions Using Activated Carbons: Effect of Adsorbent Surface Modification with Carbon Nanotubes |
| title_full | Removal of Heavy-Metal Ions from Aqueous Solutions Using Activated Carbons: Effect of Adsorbent Surface Modification with Carbon Nanotubes |
| title_fullStr | Removal of Heavy-Metal Ions from Aqueous Solutions Using Activated Carbons: Effect of Adsorbent Surface Modification with Carbon Nanotubes |
| title_full_unstemmed | Removal of Heavy-Metal Ions from Aqueous Solutions Using Activated Carbons: Effect of Adsorbent Surface Modification with Carbon Nanotubes |
| title_short | Removal of Heavy-Metal Ions from Aqueous Solutions Using Activated Carbons: Effect of Adsorbent Surface Modification with Carbon Nanotubes |
| title_sort | removal of heavy metal ions from aqueous solutions using activated carbons effect of adsorbent surface modification with carbon nanotubes |
| url | https://doi.org/10.1260/0263-6174.32.9.737 |
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