Journal
METALS
Volume 8, Issue 11, Pages -Publisher
MDPI
DOI: 10.3390/met8110914
Keywords
carbon nanofibers; metal adsorption; carbon nanomaterials; copper adsorption; wastewater
Funding
- CSIC Agency (Spain)
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This research describes the adsorption of Cu2+ onto a helical ribbon carbon nanofiber. The characterization of carbon nanofiber by zeta potential showed an isoelectronic pH of 1.9. The influence of different adsorption factors, such as stirring speed, temperature, pH, adsorbent concentration, etc., on the Cu2+ adsorption capacity have been evaluated. The pH has a great influence on Cu2+ adsorption, with the maximum adsorption capacity reached at a pH of 10. The experimental data fit well to pseudo-second order kinetic and Langmuir isotherm models (q(m) = 8.80 mg.g(-1)) at T = 298 K and pH = 4. The Cu2+ adsorption could be explained by the particle diffusion model. Results showed that carbon nanofiber could be successfully used for the elimination of Cu2+ from wastewater.
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