Abstract
An investigation, in the form of dynamic experiments, was designed to investigate equilibrium and kinetic information for the ammonium ion-exchange of clinoptilolite. The process consisted of a packed-bed column operated in up-flow mode. A number of experiments were carried out at laboratory scale. The total ionic strength was kept constant in all runs, and made to resemble the ionic environment of the effluent from the landfill assisted froth flotation (LLAFF) process, in order to validate the feasibility of using clinoptilolite to remove NH4 + ion from that wastewater. Breakthrough curves and reduced data of the Thomas equation were constructed from a range of experimental tests in order to determine maximum exchange capacity (q) and design reaction constant (k). Feed rate and packing techniques have a major effect on the dynamic condition inside the column. The influence of multi-component ions on the NH+ 4 ion-exchange performance of clinoptilolite was also studied in order to determine the negative effect of competing cations, i.e., K+, Ca2+, and Na+. The results of the study show that the column system gives an acceptable response to variable influent NH4 + loads. Desorption phenomena were also investigated when the influent was shifted to very low concentrations of NH+ 4 loads. Overall, a fixed-bed system of clinoptilolite shows high potential to remove Ma ion from the effluent of the LLAFF process.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1347-1364 |
| Number of pages | 18 |
| Journal | Separation Science and Technology |
| Volume | 39 |
| Issue number | 6 |
| DOIs | |
| State | Published - May 10 2004 |
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Keywords
- Ammonium removal
- Clinoptilolite
- Constant ionic strength
- Dynamic study
- Ion-exchange
- Up-flow
ASJC Scopus subject areas
- Chemistry(all)
- Process Chemistry and Technology
- Chemical Engineering(all)
- Filtration and Separation
Cite this
Removal of NH4 + Ion from NH4Cl Solution Using Clinoptilolite : A Dynamic Study Using a Continuous Packed-Bed Column in Up-Flow Mode. / Hankins, N. P.; Pliankarom, S.; Hilal, Nidal.
In: Separation Science and Technology, Vol. 39, No. 6, 10.05.2004, p. 1347-1364.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Removal of NH4 + Ion from NH4Cl Solution Using Clinoptilolite
T2 - A Dynamic Study Using a Continuous Packed-Bed Column in Up-Flow Mode
AU - Hankins, N. P.
AU - Pliankarom, S.
AU - Hilal, Nidal
PY - 2004/5/10
Y1 - 2004/5/10
N2 - An investigation, in the form of dynamic experiments, was designed to investigate equilibrium and kinetic information for the ammonium ion-exchange of clinoptilolite. The process consisted of a packed-bed column operated in up-flow mode. A number of experiments were carried out at laboratory scale. The total ionic strength was kept constant in all runs, and made to resemble the ionic environment of the effluent from the landfill assisted froth flotation (LLAFF) process, in order to validate the feasibility of using clinoptilolite to remove NH4 + ion from that wastewater. Breakthrough curves and reduced data of the Thomas equation were constructed from a range of experimental tests in order to determine maximum exchange capacity (q) and design reaction constant (k). Feed rate and packing techniques have a major effect on the dynamic condition inside the column. The influence of multi-component ions on the NH+ 4 ion-exchange performance of clinoptilolite was also studied in order to determine the negative effect of competing cations, i.e., K+, Ca2+, and Na+. The results of the study show that the column system gives an acceptable response to variable influent NH4 + loads. Desorption phenomena were also investigated when the influent was shifted to very low concentrations of NH+ 4 loads. Overall, a fixed-bed system of clinoptilolite shows high potential to remove Ma ion from the effluent of the LLAFF process.
AB - An investigation, in the form of dynamic experiments, was designed to investigate equilibrium and kinetic information for the ammonium ion-exchange of clinoptilolite. The process consisted of a packed-bed column operated in up-flow mode. A number of experiments were carried out at laboratory scale. The total ionic strength was kept constant in all runs, and made to resemble the ionic environment of the effluent from the landfill assisted froth flotation (LLAFF) process, in order to validate the feasibility of using clinoptilolite to remove NH4 + ion from that wastewater. Breakthrough curves and reduced data of the Thomas equation were constructed from a range of experimental tests in order to determine maximum exchange capacity (q) and design reaction constant (k). Feed rate and packing techniques have a major effect on the dynamic condition inside the column. The influence of multi-component ions on the NH+ 4 ion-exchange performance of clinoptilolite was also studied in order to determine the negative effect of competing cations, i.e., K+, Ca2+, and Na+. The results of the study show that the column system gives an acceptable response to variable influent NH4 + loads. Desorption phenomena were also investigated when the influent was shifted to very low concentrations of NH+ 4 loads. Overall, a fixed-bed system of clinoptilolite shows high potential to remove Ma ion from the effluent of the LLAFF process.
KW - Ammonium removal
KW - Clinoptilolite
KW - Constant ionic strength
KW - Dynamic study
KW - Ion-exchange
KW - Up-flow
UR - http://www.scopus.com/inward/record.url?scp=2142810116&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=2142810116&partnerID=8YFLogxK
U2 - 10.1081/SS-120030487
DO - 10.1081/SS-120030487
M3 - Article
VL - 39
SP - 1347
EP - 1364
JO - Separation Science and Technology
JF - Separation Science and Technology
SN - 0149-6395
IS - 6
ER -