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

V. J. Inglezakis, Helen Grigoropoulou

Research output: Contribution to journalArticle

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 languageEnglish
Pages (from-to)37-43
Number of pages7
JournalJournal of Hazardous Materials
Volume112
Issue number1-2
DOIs
Publication statusPublished - Aug 9 2004
Externally publishedYes

Fingerprint

Zeolites
Heavy Metals
Particle Size
zeolite
Heavy metals
heavy metal
Particle size
Flow rate
particle size
Ion Exchange
clinoptilolite
Metals
ion exchange
Ion exchange
aqueous solution
reactor
effect
removal
metal
rate

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 journalArticle

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