Kinetic studies of heavy metals biosorption by acidogenic biomass immobilized in clinoptilolite

G. M. Figueroa-Torres*, M. T. Certucha-Barragán, E. Acedo-Félix, O. Monge-Amaya, F. J. Almendariz-Tapia, L. A. Gasca-Estefanía

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

The aim of this work was to establish the sorption equilibrium and kinetics of copper, Cu(II), and iron, Fe(II), removal by acidogenic biomass immobilized in clinoptilolite. The experimental methodology consisted of a series of batch studies in which immobilized acidogenic biomass was exposed to metallic solutions within a concentration range of: 0-300 mg/L Cu(II), 0-800 mg/L Fe(II) in single systems, and 0-1000 mg/L Cu(II)-Fe(II) in a binary system. It was found that copper and iron sorption by acidogenic biomass immobilized in clinoptilolite can be represented by the pseudo second-order type reaction. Data obtained from the equilibrium studies were adequately described by the Langmuir adsorption model. Although the predicted maximum biosorption capacity of copper increased from qmax = 28.23 mgCu(II)/gSSV in the single system to qmax = 35.46 mgCu(II)/gSSV in the binary system, it was found that co-existence of copper and iron ions decreased the actual biosorption capacity of the acidogenic biomass. The findings of this work indicate that acidogenic biomass immobilized in clinoptilolite is a promising low-cost biosorbent for the removal of copper and iron, but binary metal mixtures of copper and iron must be carefully selected to avoid low removal efficiencies during a biosorption-based wastewater treatment process.

Original languageEnglish
Pages (from-to)241-246
Number of pages6
JournalJournal of the Taiwan Institute of Chemical Engineers
Volume61
DOIs
StatePublished - 1 Apr 2016

Bibliographical note

Publisher Copyright:
© 2015 Taiwan Institute of Chemical Engineers.

Keywords

  • Acidogenic biomass
  • Biosorption
  • Clinoptilolite
  • Immobilization
  • Isotherm
  • Kinetics

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