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

Environmental Advances

Jasmina S. Markovski¹  Kiril D. Hristovski¹  Dino Villagrán¹  Roy A. Arrieta¹  Ariel J. Atkinson²  Karen Ventura³  Camilah D. Powell³  Mariana Marcos-Hernández³  José Hernández³  Michael S. Wong³  Jorge Gardea-Torresdey⁴  Paul Westerhoff⁵ 

[1] Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), USA;Department of Chemical and Biomolecular Engineering, Rice University, Houston, TX 77005-1892, USA;Department of Chemistry and Biochemistry, The University of Texas at El Paso, El Paso, TX 79968, USA;School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ 85287, USA;The Polytechnic School, Ira A. Fulton Schools of Engineering, Arizona State University, Mesa, AZ 85212, USA;

关键词: Superparamagnetic;    Composite nanoadsorbents;    Zeolitic imidazolate frameworks;    Trace arsenic removal;   

DOI  :  

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown