Effects of operating conditions on the removal of heavy metals by zeolite in fixed bed reactors

V.J. Inglezakis; H. Grigoropoulou

doi:10.1016/j.jhazmat.2004.02.052

Effects of operating conditions on the removal of heavy metals by zeolite in fixed bed reactors

V.J. Inglezakis, H. Grigoropoulou

Chemical And Process Engineering

Research output: Contribution to journal › Article › peer-review

75 Citations (Scopus)

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+>Cr3+>Fe3+≥Cu2+. Finally, the operation is influenced by the studied parameters, following the order: concentration>volumetric flow rate>particlesize>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	https://doi.org/10.1016/j.jhazmat.2004.02.052
Publication status	Published - 9 Aug 2004

Keywords

heavy metals
clinoptilolite
fixed bed
ion exchenge
selectivity

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title = "Effects of operating conditions on the removal of heavy metals by zeolite in fixed bed reactors",

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+>Cr3+>Fe3+≥Cu2+. Finally, the operation is influenced by the studied parameters, following the order: concentration>volumetric flow rate>particlesize>modification of the material.",

keywords = "heavy metals, clinoptilolite, fixed bed, ion exchenge, selectivity",

author = "V.J. Inglezakis and H. Grigoropoulou",

year = "2004",

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doi = "10.1016/j.jhazmat.2004.02.052",

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T1 - Effects of operating conditions on the removal of heavy metals by zeolite in fixed bed reactors

AU - Inglezakis, V.J.

AU - Grigoropoulou, H.

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+>Cr3+>Fe3+≥Cu2+. Finally, the operation is influenced by the studied parameters, following the order: concentration>volumetric flow rate>particlesize>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+>Cr3+>Fe3+≥Cu2+. Finally, the operation is influenced by the studied parameters, following the order: concentration>volumetric flow rate>particlesize>modification of the material.

KW - heavy metals

KW - clinoptilolite

KW - fixed bed

KW - ion exchenge

KW - selectivity

U2 - 10.1016/j.jhazmat.2004.02.052

DO - 10.1016/j.jhazmat.2004.02.052

M3 - Article

VL - 112

SP - 37

EP - 43

JO - Journal of Hazardous Materials

JF - Journal of Hazardous Materials

SN - 0304-3894

IS - 1-2

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