Abstract
This work investigates the effects of flow rate (5-15 Bed Volumes/h), particle size (0.8-1.7 mm), concentration (0.005-0.02 N) and Na +-enrichment of natural clinoptilolite on the removal efficiency of Pb2+, Cu2+, Fe3+ and Cr3+ in aqueous solutions. Ion exchange is performed in an upflow fixed bed reactor. The removal efficiency is increased with decreasing flow rate, particle size and concentration and is improved by a factor of 2-10, depending on the specific metal. The modification of the natural sample is favorable, leading to an increase of removal efficiency by 32-100%. For the experimental conditions examined, removal efficiency order is the following: Pb2+>Cr 3+>Fe3+≥Cu2+. Finally, the operation is influenced by the studied parameters, following the order: concentration> volumetric flow rate>particle size>modification of the material.
| Original language | English |
|---|---|
| Pages (from-to) | 37-43 |
| Number of pages | 7 |
| Journal | Journal of Hazardous Materials |
| Volume | 112 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - Aug 9 2004 |
| Externally published | Yes |
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Keywords
- Clinoptilolite
- Fixed bed
- Heavy metals
- Ion exchange
- Selectivity
ASJC Scopus subject areas
- Chemical Health and Safety
- Process Chemistry and Technology
- Safety, Risk, Reliability and Quality
- Environmental Engineering
Cite this
Effects of operating conditions on the removal of heavy metals by zeolite in fixed bed reactors. / Inglezakis, V. J.; Grigoropoulou, Helen.
In: Journal of Hazardous Materials, Vol. 112, No. 1-2, 09.08.2004, p. 37-43.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effects of operating conditions on the removal of heavy metals by zeolite in fixed bed reactors
AU - Inglezakis, V. J.
AU - Grigoropoulou, Helen
PY - 2004/8/9
Y1 - 2004/8/9
N2 - This work investigates the effects of flow rate (5-15 Bed Volumes/h), particle size (0.8-1.7 mm), concentration (0.005-0.02 N) and Na +-enrichment of natural clinoptilolite on the removal efficiency of Pb2+, Cu2+, Fe3+ and Cr3+ in aqueous solutions. Ion exchange is performed in an upflow fixed bed reactor. The removal efficiency is increased with decreasing flow rate, particle size and concentration and is improved by a factor of 2-10, depending on the specific metal. The modification of the natural sample is favorable, leading to an increase of removal efficiency by 32-100%. For the experimental conditions examined, removal efficiency order is the following: Pb2+>Cr 3+>Fe3+≥Cu2+. Finally, the operation is influenced by the studied parameters, following the order: concentration> volumetric flow rate>particle size>modification of the material.
AB - This work investigates the effects of flow rate (5-15 Bed Volumes/h), particle size (0.8-1.7 mm), concentration (0.005-0.02 N) and Na +-enrichment of natural clinoptilolite on the removal efficiency of Pb2+, Cu2+, Fe3+ and Cr3+ in aqueous solutions. Ion exchange is performed in an upflow fixed bed reactor. The removal efficiency is increased with decreasing flow rate, particle size and concentration and is improved by a factor of 2-10, depending on the specific metal. The modification of the natural sample is favorable, leading to an increase of removal efficiency by 32-100%. For the experimental conditions examined, removal efficiency order is the following: Pb2+>Cr 3+>Fe3+≥Cu2+. Finally, the operation is influenced by the studied parameters, following the order: concentration> volumetric flow rate>particle size>modification of the material.
KW - Clinoptilolite
KW - Fixed bed
KW - Heavy metals
KW - Ion exchange
KW - Selectivity
UR - http://www.scopus.com/inward/record.url?scp=3042613717&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=3042613717&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2004.02.052
DO - 10.1016/j.jhazmat.2004.02.052
M3 - Article
C2 - 15225928
AN - SCOPUS:3042613717
VL - 112
SP - 37
EP - 43
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
SN - 0304-3894
IS - 1-2
ER -