Microscopic and macroscopic approaches of Cu(II) removal by FSM-16

Jinho Jung, Jong An Kim, Jeong Kwon Suh, Jung Min Lee, Sung Kon Ryu

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

The removal of Cu(II) by a mesoporous material, FSM-16, was studied using electron paramagnetic resonance (EPR) spectroscopy and surface complexation modeling (SCM). Free copper ions, adsorbed and precipitated Cu(II) species were qualitatively identified by in situ EPR spectroscopy of Cu-FSM-16 suspensions at room temperature and at 77K. In addition, the adsorbed species was identified as a Cu(II) species with an axial symmetry from an analysis of the EPR spectra of "dry" Cu-FSM-16 at 77K. On the basis of the EPR results, the removal of Cu(II) as a function of pH under various experimental conditions was successfully simulated by assuming two removal mechanisms such as surface complexation and surface precipitation. In the acidic pH range (<pH 6), free copper ions were predominant, and surface complexed then surface precipitated species became dominant as the pH increased.

Original languageEnglish
Pages (from-to)937-942
Number of pages6
JournalWater Research
Volume35
Issue number4
DOIs
Publication statusPublished - 2001 Jan 1
Externally publishedYes

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Keywords

  • Copper
  • EPR
  • FSM-16
  • SCM

ASJC Scopus subject areas

  • Ecological Modelling
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution

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