Abstract
Excessive discharge of phosphate into water bodies may cause eutrophication and affect the natural water quality. The adsorption behavior of phosphate from aqueous solution on fly ash was investigated by a medium calcium fly ash in weak acid solution. Experimental findings showed that removal of phosphate was pH-dependent with the maximum adsorption capacity at the initial solution pH of 5.0–7.0. The increment in the initial phosphate concentration and temperature enhanced the adsorption capacity. Kinetic studies of phosphate followed the pseudo-second-order model. The predominant removal mechanism was ligand exchange reaction on the basis of desorption experiment. The adsorbed phosphate was difficult to leach to the environment from the waste fly ash.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
R. Chitrakar, S. Tezuka, A. Sonoda, K. Sakane and T. Hirotsu, J. Colloid Interface Sci., 298, 602 (2006).
J. Chen, H. Kong and D. Wu, J. Hazard. Mater., B139, 293 (2007).
L. Johansson and J. P. Gustafsson, Water Res., 34, 259 (2000).
Y. Li, C. Liu and Z. Luan, J. Hazard. Mater., B137, 374 (2006).
K. S. Kim, J. O. Park and S. C. Nam, Environ. Eng. Res., 18, 267 (2013).
S. G. Lu, S. Q. Bai, L. Zhu and H. D. Shan, J. Hazard. Mater., 161, 95 (2009).
K. Xu, T. Deng, J. Liu and W. Peng, Fuel, 89, 3668 (2010).
X. Xu, Q. Li, H. Cui, J. Pang, L. Sun, H. An and J. Zhai, Desalination, 272, 233 (2011).
T. J. Hsu, Fuel, 87, 3040 (2008).
D. Sun, X. Zhang, Y. Wu and X. Liu, J. Hazard. Mater., 181, 335 (2010).
D. Sun, X. Zhang, Y. Wu and T. Liu, Int. J. Environ. Sci. Technol., 10, 799 (2013).
E. Oguz, Colloids Surf., A: Physicochem., 262, 113 (2005).
Z. He and C. W. Honeycutt, A modified molybdenum blue method for orthophosphate determination suitable for investigating enzymatic hydrolysis of organic phosphates, Publications from USDA-ARS/UNL Faculty (2005).
V. S. Mane, I. D. Mall and V. C. Srivastava, J. Environ. Manage., 84, 390 (2007).
B. Saha, S. Chakraborty and G. Das, J. Colloid Interface Sci., 331, 21 (2009).
B. Acemiǒglu, J. Colloid Interface Sci., 274, 371 (2004).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Wang, Y., Sun, D. Phosphate removal from aqueous solutions on fly ash with medium calcium content. Korean J. Chem. Eng. 32, 1323–1326 (2015). https://doi.org/10.1007/s11814-014-0342-6
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11814-014-0342-6