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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. 1, 2016, pp. 47-54
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Bioline Code: st16005
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. 1, 2016, pp. 47-54
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Study on the adsorption behavior of modified persimmon powder biosorbent on Pt(IV)
Gong, Q.Q.; Guo, X.Y.; Liang, S.; Wang, C. & Tian, Q.H.
Abstract
A glycine-modified persimmon powder was
used as biosorbent for platinum adsorption in aqueous solution.
The combined effects of modifying agent amount,
modifying time and temperature on Pt(IV) adsorption by
persimmon biosorbent were investigated, from which the
optimum modification conditions with modifying agent
amount of 50 %, temperature of 333 K and contact time of
4.0 h were determined. The influences of solution initial
pH, solid-to-liquid ratio, contact time, temperature and
initial concentration on the Pt(IV) adsorption were studied
systematically by batch experiments. The optimum
modification conditions were determined as follows: chemical
reagent amount of 50 %, temperature of 333 K and
contact time of 4.0 h. From the adsorption kinetic analysis,
it was found that the adsorption kinetics of glycine-modified
persimmon powder followed a pseudo-second-order
kinetic model. The adsorption isotherms of the crude persimmon
powder and glycine-modified persimmon powder
were analyzed with the BET-type adsorption isotherm. The
adsorption mechanism of Pt(IV) on the glycine-modified
persimmon was considered to be adsorption-reduction
mechanism. The results achieved from this study indicated
that the novel persimmon adsorbent could be applied to
recover trace Pt(IV) ions from a concentrated chloride
solution.
Keywords
Persimmon; Glycine; Platinum; Biosorption; BET isotherm
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