Application of Phragmites australis to remove phenol from aqueous solutions by chemical activation in batch and fixed-bed columns
The ability of the agricultural residue of Phragmites australis to serve as an absorbent material used to remove phenol from aqueous solutions in batch and continuous fixed-bed columns was investigated. Prepared adsorbents were characterized by SEM, FTIR, and pHpzc methods. The equilibrium adsorptio...
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Veröffentlicht in: | Environmental science and pollution research international 2018-08, Vol.25 (24), p.23917-23928 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The ability of the agricultural residue of
Phragmites australis
to serve as an absorbent material used to remove phenol from aqueous solutions in batch and continuous fixed-bed columns was investigated. Prepared adsorbents were characterized by SEM, FTIR, and pHpzc methods. The equilibrium adsorption (qe) of phenol was increased from 9.61 to 29.40 mg/g when the initial phenol concentrations increased from 50 to 150 mg/L. The max adsorption capacity of
Phragmites australis
was found to be 29.60 mg/g at 30 °C. In column studies, a higher flow rate, higher initial concentration of phenol, and shorter packing layer height increase the column adsorption capacity of phenol. In a batch and continuous fixed-bed column studies, the experiment data was evaluated by some classic models. Fitting degree between the experimental results shows that the pseudo-second-order adsorption kinetics and Langmuir model were the best. Thomas and Yoon-Nelson models were in good agreement with the experimental breakthrough curve data. Both batch and continuous investigation indicated that
Phragmites australis
could be used as a fine adsorbent to remove phenol and that the adsorption efficiency improved significantly in the column experiment. |
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ISSN: | 0944-1344 1614-7499 |
DOI: | 10.1007/s11356-018-2457-5 |