Back to Search
Start Over
Continuous Fixed-Bed Column Study and Adsorption Modeling: Removal of Arsenate and Arsenite in Aqueous Solution by Organic Modified Spent Grains.
- Source :
-
Polish Journal of Environmental Studies . 2017, Vol. 26 Issue 4, p1847-1854. 8p. - Publication Year :
- 2017
-
Abstract
- The adsorption of arsenate (As(V)) and arsenite (As(III)) was conducted in a continuous fixed-bed column by using organic modified spent grains (OSGs). The column performances were evaluated by varying the influent flow rate (0.91, 1.36, and 2.72 ml/min) and arsenic ions initial concentration (1.0, 2.0, and 6.0 mg/l for As(V); 0.5, 1.0, and 3.0 mg/l for As(III)) in order to obtain experimental breakthrough curves. The maximum adsorption capacity was at 6.0 mg/l for As(V) and 3.0 mg/l for As(III) influent concentration and 1.36 ml/min flow rate. The Thomas model, Adams-Bohart model, and Yoon-Nelson kinetic models were used to analyze column performance. The value of rate constant for Thomas and Adams-Bohart models decreased with increase of influent concentration, but increased with increasing flow rate. The rate constant for the Yoon-Nelson model decreased with increases in both initial influent arsenic ions concentration and flow rate. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ARSENITES
*ARSENIC compounds
*AQUEOUS solutions
*COSMIC grains
*SURFACE chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 12301485
- Volume :
- 26
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Polish Journal of Environmental Studies
- Publication Type :
- Academic Journal
- Accession number :
- 124319016
- Full Text :
- https://doi.org/10.15244/pjoes/68869