PREPARATION OF ANION-EXCHANGE CELLULOSE FOR THE REMOVAL OF CHROMATE
ABSTRACT The quaternary ammonium group containing cellulose was prepared by the one-pot method and applied for the removal of chromate (CrO42−) ions from aqueous solution. The prepared sorbent was characterized by using elemental analyzer and Fourier transform infrared (FTIR) spectroscopy....
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| Lenguaje: | English |
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Sociedad Chilena de Química
2019
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| Acceso en línea: | http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072019000204471 |
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| Sumario: | ABSTRACT The quaternary ammonium group containing cellulose was prepared by the one-pot method and applied for the removal of chromate (CrO42−) ions from aqueous solution. The prepared sorbent was characterized by using elemental analyzer and Fourier transform infrared (FTIR) spectroscopy. Its ion exchange behavior toward CrO42− ions was investigated as a function of sorbent dose and initial solution pH. The kinetic and sorption equilibrium experiments were also carried out in a batch system. Equilibrium data were best fitted with the Langmuir model and the maximum ion exchange capacity of the sorbent was found as 3.8 mg of CrO42−/g sorbent. Moreover, the removal of CrO42− is achieved within 5 minutes. Furthermore, the calculated thermodynamic parameters disclosed that the ion exchange reaction is feasible, spontaneous and exothermic. In addition, the CrO42− ions can be desorbed from the sorbent by 1.0 M HCl solution with 95% regeneration efficiency. |
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