Title :
Phosphorus Adsorption by Dewatered and Activated Alum Sludge
Author :
Tie, Jingxi ; Zhao, Lei ; Guo, Hongcao
Author_Institution :
Sch. of Environ. & Municipal Eng., North China Univ. of Water Resources & Electr. Power, Zhengzhou, China
Abstract :
In this study, a series of batch experiments were conducted to investigate the phosphorus (P) adsorption properties of alum sludge dried at 100°C (AS100) and activated at 300 (AS300), 500 (AS500) and 900°C (AS900). In the adsorption test, the adsorption isotherms, kinetics, pH and temperature effect were examined. The results indicated that the Langmuir adsorption isotherm is fit for the description of the phosphorus adsorption on the four adsorbents, and the adsorption capacities is ordered as follows: AS300 >; AS500 >; AS100 >; AS900. Both the double-constant rate equation and the simple Elovich equation are fit for the description of adsorption processes of AS100, AS300 and AS500, the double constant rate equation is fit for AS900. Lower pH and higher temperature are favorable for increase of phosphorus adsorption on four adsorbents.
Keywords :
adsorption; pH; phosphorus; sludge treatment; water treatment; Elovich equation; Langmuir adsorption isotherm; P; activated alum sludge; adsorbents; adsorption processes; dewatered alum sludge; double- constant rate equation; double-constant rate equation; drinking- water treatment industry; pH; phosphorus adsorption; temperature 100 C; temperature 300 C; temperature 500 C; temperature 900 C; Automation; alum sludge; phosphorus adsorption;
Conference_Titel :
Intelligent Computation Technology and Automation (ICICTA), 2011 International Conference on
Conference_Location :
Shenzhen, Guangdong
Print_ISBN :
978-1-61284-289-9
DOI :
10.1109/ICICTA.2011.496
