Abstract

The goal of this study was to develop an inexpensive and easy to fabricate titanium dioxide-based hybrid ion-exchange media (Ti-HIX) and assess its potential to remove arsenic and nitrate from water. Different Ti-HIX media were fabricated via in-situ formation of TiO2 nanoparticles within the pores of three different commercially IX resins; the Ti-HIX media were characterized; and the arsenic and nitrate removal potential of the most economically feasible Ti-HIX media was assessed in model water under batch pseudo-equilibrium conditions. The Ti-HIX media were characterized with content ranging between 11% and 21% TiO2 per media dry mass. The TiO 2 exhibited form of anatase nanoparticles. The Freundlich adsorption intensity parameters (1/n) for all the Ti-HIX media were < 1 implying favorable adsorption for arsenic. The estimated maximum adsorption capacity for arsenic expressed per mass of titanium ranged between 16.6 mgAs g-1 Ti, 24.9 mgAs g-1Ti, and 27.3 for different types of tested Ti-HIX media, and was several fold higher than similar reported values in the literature. Nitrate removal performance of the base ion-exchange resins used in synthesis of the Ti-HIX media was not adversely impacted by the synthesis process.

Original languageEnglish (US)
Title of host publicationNovel Solutions to Water Pollution
PublisherAmerican Chemical Society
Pages223-236
Number of pages14
ISBN (Print)9780841227545
DOIs
StatePublished - Mar 18 2013

Publication series

NameACS Symposium Series
Volume1123
ISSN (Print)0097-6156
ISSN (Electronic)1947-5918

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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    Elton, J., Hristovski, K., & Westerhoff, P. (2013). Titanium dioxide-based hybrid ion-exchange media for simultaneous removal of arsenic and nitrate. In Novel Solutions to Water Pollution (pp. 223-236). (ACS Symposium Series; Vol. 1123). American Chemical Society. https://doi.org/10.1021/bk-2013-1123.ch013