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

V. J. Inglezakis; Helen 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, Helen Grigoropoulou

Department of Chemical and Materials 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⁺>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	https://doi.org/10.1016/j.jhazmat.2004.02.052
Publication status	Published - Aug 9 2004

Keywords

Clinoptilolite
Fixed bed
Heavy metals
Ion exchange
Selectivity

ASJC Scopus subject areas

Environmental Engineering
Environmental Chemistry
Waste Management and Disposal
Pollution
Health, Toxicology and Mutagenesis

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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.",

keywords = "Clinoptilolite, Fixed bed, Heavy metals, Ion exchange, Selectivity",

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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.

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KW - Selectivity

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