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Evaluation of Loess Capability for Adsorption of Total Nitrogen (T-N) and Total Phosphorous (T-P) in Aqueous Solution.
- Source :
-
Bulletin of the Korean Chemical Society . 2014, Vol. 35 Issue 8, p2471-2476. 6p. - Publication Year :
- 2014
-
Abstract
- The aim of the present study is to explore the possibility of utilizing loess for the adsorption of total phosphorous (T-P) and total nitrogen (T-N) in water. Batch adsorption studies were performed to evaluate the influences of various factors like initial concentration, contact time and temperature on the adsorption of T-P and T-N. The adsorption data showed that loess is not effective for the adsorption of T-N. However, loess exhibited much higher adsorption capacity for T-P. At concentration of 1.0 mg L-1, approximately 97% of T-P adsorption was achieved by loess. The equilibrium data were fitted well to the Langmuir isotherm model. The pseudo-second-order kinetic model appeared to be the better-fitting model because it has higher R² compared with the pseudo-first-order and intra-particle kinetic model. The theoretical adsorption equilibrium qe,cal from pseudo-second-order kinetic model was relatively similar to the experimental adsorption equilibrium qe,exp. The thermodynamic parameters such as free energy ρG, the enthalpy ρH and the entropy ρS were also calculated. [ABSTRACT FROM AUTHOR]
- Subjects :
- *LOESS
*ADSORPTION (Chemistry)
*NITROGEN
*PHOSPHORUS
*AQUEOUS solutions
Subjects
Details
- Language :
- English
- ISSN :
- 02532964
- Volume :
- 35
- Issue :
- 8
- Database :
- Academic Search Index
- Journal :
- Bulletin of the Korean Chemical Society
- Publication Type :
- Academic Journal
- Accession number :
- 108750250
- Full Text :
- https://doi.org/10.5012/bkcs.2014.35.8.2471