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Title
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Multicomponent isotherms for biosorption of Ni2+ and Zn2+
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Sub-Title |
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Subject |
Nickel Zinc Biosorption multicomponent isotherms SEM and EDS
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Sub-Subject |
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Author |
Dr. K. S. Baig
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Publish Year |
2009 |
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Supervisor |
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Diss#. |
doi:10.1016/j.desal.2009.06.052 |
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Pages |
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Text Language |
English |
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Accession |
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Library Section |
Research Article |
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Abstract |
The capability of wheat straw to adsorb Ni2+ and Zn2+ was investigated using a batch system. The equilibrium
removal of metal ions was obtained between 2.5 and 5h for Ni2+ and about 3h for Zn2+ over the initial
concentration range from 5 to 150 ppm. Of the total amount of metal uptake by wheat straw, about 50% was
adsorbed in the first 30 min. At a lowinitial concentration of 5 ppm,wheat strawwas capable to reduce themetal
concentration down to less than 1 ppm. For single-metal solutions, among the three models tested, namely the
Langmuir, the Freundlich and the Temkin isotherms, the Freundlich model was suitable to describe the
adsorption equilibriumfor Ni2+ and Zn2+. For bimetal solutions, the IAST-Freundlich multicomponent isotherm
best fitted the experimental data, among the four isotherm models investigated, the modified Langmuir
multicomponent model, the Langmuir partially competitive model, the Freundlich multicomponent model and
the IAST-Freundlich multicomponent model. The neg
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