Zhang,L., Liu,J., Wan,L., Zhou,Q. and Wang,X.(2012): Batch and fixed-bed column performance of phosphate adsorption by lanthanum-doped activated carbon fiber. Water Air Soil Pollut., 223, 5893-5902.

『ランタンをドープした活性化炭素繊維によるリン酸塩吸着のバッチと固定層カラム成績』


Abstract
 Phosphate removal from water is crucial to the prevention of eutrophication. The phosphate adsorption performance from aqueous solutions by using lanthanum-doped activated carbon fiber (ACF-La) was developed by batch and continuous column adsorption method. The batch sorption condition with respect to interfering ions was tested, and the pseudo second-order and intraparticle diffusion models were used to evaluate the adsorption kinetics of phosphate onto ACF-La in the presence of interfering ions, with the second-order model to fit the experimental data better. Moreover, three factors (phosphate concentration, flow rate, and interfering ions) were examined at column run method to evaluate the practical application of ACF-La to the continuous removal phosphate from solution. Furthermore, how the factors (eluted solution concentration, eluted time, and regeneration number) affect the regeneration efficiency of ACF-La was also investigated. These findings suggest that ACF-La has a considerable potential for the application of phosphate removal from contaminated waters.

Keywords: Phosphate removal; Activated carbon fiber; Lanthanum; Column adsorption』

1. Introduction
2. Materials and methods
 2.1. Materials
 2.2. Preparation and characterization of adsorbent
 2.3. Adsorption of phosphate and the stability of ACF-La
 2.4. Effect of interfering ions on phosphate adsorption
 2.5. Column adsorption of ACF-La
 2.6. Regeneration of ACF-La
 2.7. Data analysis
3. Results and discussion
 3.1. SEM and BET studies of ACF and ACF-La
 3.2. Phosphate adsorption of ACF and ACF-La
 3.3. The stability of ACF-La
 3.4. Effect of the interfering ions on phosphate removal of ACF-La
  3.4.1. Effect of interfering ions on phosphate adsorption
  3.4.2. Effect of interfering ions on kinetic adsorption
 3.5. The column adsorption of ACF-La
  3.5.1. Effect of the phosphate concentration on column adsorption of ACF-La
  3.5.2. Effect of flow rate on column adsorption of ACF-La
  3.5.3. Effect of the interfering ions on column adsorption of ACF-La
 3.6. The regeneration of ACF-La
  3.6.1. Effect of concentration of eluted solution on regeneration of ACF-La
  3.6.2. Effect of eluted time on regeneration of ACF-La
4. Conclusion
Acknowledgments
References


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