Synthesis and characterization of LIX-84 noncovalently bound silica sorbents for metal-ion recovery

C. Cooper, Y. S. Lin, M. Gonzalez

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

Mesoporous silica particles were modified with LIX-84 (2-hydroxy-5-nonylacetophenome oxime). LIX-84 was attached to the surface of silica via noncovalent forces. The effects of silica particle size, pore size, temperature, and pH on metal-ion-exchange properties were studied to characterize metal ion adsorption properties for chelating groups noncovalently bound to the surface of silica. The adsorbent had a capacity of 0.6 mmol of Cu2+/g of adsorbent at room temperature and a capacity of 1.1 mmol of Cu2+/g of adsorbent at 60 °C. Depending on the solution pH, the adsorbent had varying capacity for Cu2+, Ni2+, and Pb2+. The adsorbent was found to have good stability and gave high metal recovery when regenerated with 2 vol % nitric acid. An increased ion-exchange rate was achieved and was attributed to the use of larger pore size silica. The silica was found to contain from 5 to 7 wt % LIX-84.

Original languageEnglish (US)
Pages (from-to)1253-1260
Number of pages8
JournalIndustrial and Engineering Chemistry Research
Volume42
Issue number6
DOIs
StatePublished - Mar 19 2003
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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