Novel nanostructured iron oxide cryogels for arsenic (As(III)) removal

Lila Otero-González, Sergey V. Mikhalovsky, Miroslava Václavíková, Mikhail V. Trenikhin, Andrew B. Cundy, Irina N. Savina

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Novel macroporous iron oxide nanocomposite cryogels were synthesized and assessed as arsenite (As(III)) adsorbents. The two-step synthesis method, by which a porous nanonetwork of iron oxide is firstly formed, allowed a homogeneous dispersion of the iron oxide in the cryogel reaction mixture, regardless of the nature of the co-polymer forming the cryogel structure. The cryogels showed excellent mechanical properties, especially the acrylamide-based cryogel. This gel showed the highest As(III) adsorption capacity, with the maximum value estimated at 118 mg/g using the Langmuir model. The immobilization of the nanostructured iron oxide gel into the cryogel matrix resulted in slower adsorption kinetics, however the cryogels offer the advantage of a stable three-dimensional structure that impedes the release of the iron oxide nanoparticles into the treated effluent. A preliminary toxicity evaluation of the cryogels did not indicate any apparent inhibition of human hepatic cells activity, which together with their mechanical stability and high adsorption capacity for As(III) make them excellent materials for the development of nanoparticle based adsorption devices for drinking water treatment.

    Original languageEnglish
    Article number120996
    JournalJournal of Hazardous Materials
    Volume381
    DOIs
    Publication statusPublished - 12 Aug 2019

    Keywords

    • Adsorbent
    • Arsenic
    • Iron oxide nanoparticles
    • Polymer cryogel
    • Water remediation

    Fingerprint

    Dive into the research topics of 'Novel nanostructured iron oxide cryogels for arsenic (As(III)) removal'. Together they form a unique fingerprint.

    Cite this