Amino functionalized hierarchically produced porous polyacrylamide microspheres for the removal of chromium(VI) from aqueous solution

作者：Karimi Mehdi; Nematollahzadeh Ali^*; Shojaei Akbar

来源：Journal of Porous Materials, 2017, 24(6): 1705-1715.

DOI：10.1007/s10934-017-0413-2

• Amino functionalized
• Polyacrylamide
• Porous particle
• Adsorption

Porous silica microspheres were used as hard template to produce porous polyacrylamide microspheres. The microspheres were modified with ethylenediamine and used for the removal of hexavalent chromium [Cr(VI)] from aqueous solution. Scanning electron microscopy, thermogravimetry analysis, and Fourier transform infrared spectroscopy were utilized to characterize the adsorbent. Adsorption of Cr(VI) was conducted in batch and dynamic modes, and effect of various parameters including solution pH, adsorbent dose, initial concentration of Cr(VI) and agitation time on the adsorption process was studied. The optimum pH for the maximum adsorption (124 mg Cr(VI)/g dry polymer) was found to be 3. Dynamic binding assay exhibited fast binding kinetics. The adsorption kinetics showed a good agreement with pseudo-second-order model. Meanwhile experimental data obtained from the batch binding assay could be well described by Langmuir isotherm model. The recovery of the adsorbent was successfully carried out by 0.2 M NaOH solution.

• 出版日期2017-12