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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472 EISSN: 1735-1472
Vol. 11, No. 4, 2014, pp. 1093-1100
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Bioline Code: st14108
Full paper language: English
Document type: Research Article
Document available free of charge
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International Journal of Environment Science and Technology, Vol. 11, No. 4, 2014, pp. 1093-1100
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Evaluation of adsorption potential of bamboo biochar for metal-complex dye: equilibrium, kinetics and artificial neural network modeling
Yang, Y.; Lin, X.; Wei, B.; Zhao, Y. & Wang, J.
Abstract
Metal-complex dyes are widely used in textile
industry, but harmful to the environment and human health
due to aromatic structure and heavy metal ions. The
objective of this work was to evaluate the adsorption
potential of bamboo biochar for the removal of metalcomplex
dye acid black 172 from solutions. Freundlich
model was more suitable for the adsorption process of
bamboo biochar than Langmuir isotherm, indicating multilayer
adsorption of acid black 172 on a heterogeneous
bamboo biochar surface. Adsorption kinetics analysis of
pseudo-second-order and Weber–Morris models revealed
that intraparticle transport was not the only rate-limiting
step. The bamboo biochar exhibited a good adsorption
performance even at high ionic strength. Analysis based on
the artificial neural network indicated that the temperature
with a relative importance of 29 % appeared to be the most
influential parameter in the adsorption process for dye
removal, followed by time, ionic strength, pH and dye
concentration.
Keywords
Bamboo biochar; Metal-complex dye; Artificial neural network; Adsorption equilibrium; Ionic strength
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