Superparamagnetic nanoadsorbents for the removal of trace As(III) in drinking water

Mariana Marcos-Hernández, Roy A. Arrieta, Karen Ventura, José Hernández, Camilah D. Powell, Ariel J. Atkinson, Jasmina S. Markovski, Jorge Gardea-Torresdey, Kiril D. Hristovski, Paul Westerhoff, Michael S. Wong, Dino Villagrán

Research output: Contribution to journalArticlepeer-review

Abstract

A series of novel zeolitic imidazolate framework (ZIF) decorated superparamagnetic graphene oxide hybrid nanoadsorbents were synthesized, characterized, and tested for their As(III) adsorbed amount in simulated drinking water. The three composite nanomaterials are based each on three isostructural and water stable ZIFs, (C-1 based on ZIF-8, C-2 based on ZIF-67, and C-3 based on ZIF-Zn/Co). The composite nanomaterials and there parent materials were characterized through pXRD, TEM, FTIR, BET and magnetometry methods (SQUID), and were tested as adsorbents in a representative drinking water matrix containing arsenite (As(III)) at an initial trace concentration (realistic in some natural drinking water sources) of 35 µg/L. The nanoadsorbents were magnetically captured and removed after adsorption in batch conditions. Out of the three composites, C-2 shows the highest As(III) adsorbed amount at an initial concentration of 35 µg/L (q0) of 202 µg/g, followed by C-3 with 102 µg/g and C-1 with 82 µg/g.

Original languageEnglish (US)
Article number100046
JournalEnvironmental Advances
Volume4
DOIs
StatePublished - Jul 2021

Keywords

  • Composite nanoadsorbents
  • Superparamagnetic
  • Trace arsenic removal
  • Zeolitic imidazolate frameworks

ASJC Scopus subject areas

  • Environmental Chemistry
  • Global and Planetary Change
  • Environmental Science (miscellaneous)

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