Selective capture of cesium and thallium from natural waters and simulated wastes with copper ferrocyanide functionalized mesoporous silica

Thanapon Sangvanich, Vichaya Sukwarotwat, Robert J. Wiacek, Rafal M. Grudzien, Glen E. Fryxell, R. Shane Addleman, Charles Timchalk, Wassana Yantasee

Research output: Contribution to journalArticle

250 Scopus citations

Abstract

Copper(II) ferrocyanide on mesoporous silica (FC-Cu-EDA-SAMMS™) has been evaluated against iron(III) hexacyanoferrate(II) (insoluble Prussian Blue) for removing cesium (Cs+) and thallium (Tl+) from natural waters and simulated acidic and alkaline wastes. From pH 0.1-7.3, FC-Cu-EDA-SAMMS had greater affinities for Cs and Tl and was less affected by the solution pH, competing cations, and matrices. SAMMS also outperformed Prussian Blue in terms of adsorption capacities (e.g., 21.7 versus 2.6mgCs/g in acidic waste stimulant (pH 1.1), 28.3 versus 5.8mgTl/g in seawater), and rate (e.g., over 95wt% of Cs was removed from seawater after 2min with SAMMS, while only 75wt% was removed with Prussian Blue). SAMMS also had higher stability (e.g., 2.5-13-fold less Fe dissolved from 2 to 24h of contact time). In addition to environmental applications, SAMMS has great potential to be used as orally administered drug for limiting the absorption of radioactive Cs and toxic Tl in gastrointestinal tract.

Original languageEnglish (US)
Pages (from-to)225-231
Number of pages7
JournalJournal of Hazardous Materials
Volume182
Issue number1-3
DOIs
StatePublished - Oct 2010

Keywords

  • Cesium
  • Ferrocyanide
  • Mesoporous silica
  • Prussian Blue
  • Thallium

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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