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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. 13, No. 8, 2016, pp. 1933-1940
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Bioline Code: st16178
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. 13, No. 8, 2016, pp. 1933-1940
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Separation of Cu2+ and Pb2+ by tetraethylenepentamine-modified sugarcane bagasse fixed-bed column: selective adsorption and kinetics
Yu, J.; Xiong, W.; Zhu, J. & Chi, R.
Abstract
Tetraethylenepentamine-modified sugarcane
bagasse (SCB) was prepared to improve its adsorption
capacity and selectivity toward Cu2+. Adsorption performances of the modified sorbent for Cu2+ were studied in
batch system. Separation of Cu2+ from Pb2+ by the modified
sorbent fixed-bed column were studied under dynamic system with initial molar concentration ratio (C0Cu/C0Pb) ranging from 1:1 to 1:100. The amount of Cu2+ and Pb2+
adsorbed on the saturated column was calculated by the
elution curve. Batch experimental results showed that the
adsorption capacity of the sorbent for Cu2+ increased from
0.12 to 0.21 mmol g-1 after modification. Dynamic
adsorption results showed that the modified SCB had higher
adsorption affinity toward Cu2+ than Pb2+. 0.07 mmol g-1
of adsorbed Pb2+ was pushed off by Cu2+ during the
competitive adsorption process at C0Cu/C0Pb = 1:1. The
breakthrough curves and adsorption kinetics of Cu2+ in the
column could be fitted well by the Yoon–Nelson and
modified Yoon–Nelson model, respectively. According to
the elution curve, the amount of Cu2+ adsorbed on the fixed-bed column were 0.16, 0.16 and 0.15 mmol g-1, while that
of Pb2+ were 0.0016, 0.0051 and 0.0094 mmol g-1 when
C0Cu/C0Pb increased from 1:1 to 1:10 and 1:100. Cu2+ could
be selectively adsorbed and separated from Pb2+ by using
the modified sorbent fixed-bed column.
Keywords
Amination; Sugarcane bagasse; Dynamic adsorption; Cu2+; Pb2+
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