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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
environmental science
Adsorption of Direct Blue 53 dye from aqueous solutions by multi-walled carbon nanotubes and activated carbon
Journal of Environmental Management, Volume 130, Year 2013
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Description
Multi-walled carbon nanotubes (MWCNT) and powder activated carbon (PAC) were used as adsorbents for adsorption of Direct Blue 53 dye (DB-53) from aqueous solutions. The adsorbents were characterised using Raman spectroscopy, N2 adsorption/desorption isotherms, and scanning and transmission electron microscopy. The effects of initial pH, contact time and temperature on adsorption capacity of the adsorbents were investigated. At pH 2.0, optimum adsorption of the dye was achieved by both adsorbents. Equilibrium contact times of 3 and 4h were achieved by MWCNT and PAC adsorbents, respectively. The general order kinetic model provided the best fit of the experimental data compared to pseudo-first order and pseudo-second order kinetic adsorption models. For DB-53 dye, the equilibrium data (298-323K) were best fitted to the Sips isotherm model. The maximum sorption capacity for adsorption of the dye occurred at 323K, with the values of 409.4 and 135.2mgg-1 for MWCNT and PAC, respectively. Studies of adsorption/desorption were conducted and the results showed that DB-53 loaded MWCNT could be regenerated (97.85%) using a mixture 50% acetone+50% of 3molL-1 NaOH. Simulated dye house effluents were used to evaluate the application of the adsorbents for effluent treatment (removal of 99.87% and 97.00% for MWCNT and PAC, respectively, were recorded). © 2013 Elsevier Ltd.
Authors & Co-Authors
Prola, Liziê D.T.
Brazil, Porto Alegre
Universidade Federal do Rio Grande do Sul
Machado, Fernando M.
Brazil, Porto Alegre
Universidade Federal do Rio Grande do Sul
Brazil, Santa Maria
Universidade Franciscana
Bergmann, Carlos Peŕez Peŕez
Brazil, Porto Alegre
Universidade Federal do Rio Grande do Sul
Gally, Caline Rodrigues
Brazil, Porto Alegre
Universidade Federal do Rio Grande do Sul
Lima, Eder C.
Brazil, Porto Alegre
Universidade Federal do Rio Grande do Sul
Adebayo, Matthew Ayorinde
Brazil, Porto Alegre
Universidade Federal do Rio Grande do Sul
Pereira Dias, Silvio Luis
Brazil, Porto Alegre
Universidade Federal do Rio Grande do Sul
Calvete, Tatiana
Brazil, Canoas
Universitary Center la Salle Unilasalle
Statistics
Citations: 157
Authors: 8
Affiliations: 3
Identifiers
Doi:
10.1016/j.jenvman.2013.09.003
ISSN:
03014797
Research Areas
Environmental