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

Journal of Hazardous Materials
V J Inglezakis, H P Grigoropoulou

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+ > or = Cu2+. Finally, the operation is influenced by the studied parameters, following the order: concentration > volumetric flow > rate > particle size > modification of the material.

References

Jun 11, 1999·Journal of Colloid and Interface Science·V J InglezakisH P Grigoropoulou
Apr 5, 2001·Environmental Technology·V J InglezakisH P Grigoropoulou
May 19, 2001·Water Research·V J InglezakisH P Grigoropoulou

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Citations

Feb 1, 2011·Journal of Hazardous Materials·Xuegang LuoChi Zhang
Jun 10, 2008·Journal of Colloid and Interface Science·Lu LvX S Zhao
Feb 19, 2008·Journal of Environmental Sciences (China)·Heung Jai ParkSeung Mok Lee
Nov 23, 2006·Journal of Hazardous Materials·Marinos A StylianouMaria D Loizidou
Apr 7, 2016·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·D Thushari N WijesingheDeli Chen
Jan 24, 2007·Journal of Hazardous Materials·Yong Sik OkDoug-Young Chung
Feb 8, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Alain WalcariusJacques Bessiere

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