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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. 6, 2014, pp. 1759-1770
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Bioline Code: st14172
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. 6, 2014, pp. 1759-1770
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Removal of lead (II) from synthetic and batteries wastewater using agricultural residues in batch/column mode
Singh, J.; Ali, A. & Prakash, V.
Abstract
The present article explores the ability of five
different combinations of two adsorbents (Arachis hypogea
shell powder and Eucalyptus cameldulensis saw dust) to
remove Pb(II) from synthetic and lead acid batteries
wastewater through batch and column mode. The effects of
solution pH, adsorbent dose, initial Pb(II) concentration
and contact time were investigated with synthetic solutions
in batch mode. The Fourier transform infrared spectroscopy
study revealed that carboxyl and hydroxyl functional
groups were mostly responsible for the removal of Pb(II)
ions from test solutions. The kinetic data were found to
follow pseudo-second-order model with correlation coefficient
of 0.99. Among Freundlich and Langmuir adsorption
models, the Langmuir model provided the best fit to
the equilibrium data with maximum adsorption capacity of
270.2 mg g-1. Column studies were carried out using lead
battery wastewater at different flow rates and bed depths.
Two kinetic models, viz. Thomas and Bed depth service
time model, were applied to predict the breakthrough
curves and breakthrough service time. The Pb(II) uptake
capacity (qe = 540.41 mg g-1) was obtained using bed
depth of 35 cm and a flow rate of 1.0 mL min-1 at 6.0 pH.
The results from this study showed that adsorption capacity
of agricultural residues in different combinations is much
better than reported by other authors, authenticating that
the prepared biosorbents have potential in remediation of
Pb-contaminated waters.
Keywords
Lead acid batteries wastewater; Arachis hypogea; Eucalyptus cameldulensis; Biosorbents; Bed depth service model; Thomas model
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