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

JOURNAL OF HAZARDOUS MATERIALS

卷:381

Article

Otero-Gonzalez, Lila¹  Mikhalovsky, Sergey V.^2,3  Vaclavikova, Miroslava⁴  Trenikhin, Mikhail V.⁵  Cundy, Andrew B.^1,7  Savina, Irina N.⁶ 

[1] Univ Brighton, Sch Environm & Technol, Brighton BN2 4GJ, E Sussex, England

[2] ANAMAD Ltd, Sussex Innovat Ctr Sci Pk Sq, Brighton BN1 9SB, E Sussex, England

[3] Chuiko Inst Surface Chem, 17 Gen Naumov St, UA-03164 Kiev, Ukraine

[4] Slovak Acad Sci, Inst Geotech, Kosice 04001, Slovakia

[5] Russian Acad Sci, Ctr New Chem Technol, Fed Res Ctr Boreskov, Inst Catalysis,Siberian Branch, Omsk 644040, Russia

[6] Univ Brighton, Sch Pharm & Biomol Sci, Brighton BN2 4GJ, E Sussex, England

[7] Univ Southampton, Natl Oceanog Ctr Southampton, Ocean & Earth Sci, Southampton SO14 3ZH, Hants, England

关键词: Iron oxide nanoparticles;    Adsorbent;    Arsenic;    Water remediation;    Polymer cryogel;   

DOI  :  10.1016/j.jhazmat.2019.120996

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

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