453499 Metal-Organic Framework/α-Alumina Composite Withnovel Geometry for Enhanced Adsorptive Separation

Tuesday, November 15, 2016: 1:24 PM
Golden Gate 5 (Hilton San Francisco Union Square)
Chenghong WANG, Department of Civil & Environmental Engineering, National University of Singapore, Singapore, Singapore

UiO-66, as a prototypical zirconium-based metal-organic framework
(MOF), provides a rapid uptake of arsenic from water when compared
to other typical adsorbents with the same order-of-magnitude particle
size. This fast kinetics allows an efficient adsorptive separation to be
realized within a micro-space. Moreover, α-alumina can be specifically
structured into a novel hollow fiber geometry: containing a plurality of
open radial micro-channels on the shell side and a very thin barrier
layer at the lumen. Through a facile vacuum filtration method, a
MOF/α-alumina composite with novel geometry is developed and
optimized in this study. The composite leads to a new concept for
enhanced adsorptive separation: efficient adsorption occurs within
numerous conical micro-channels with no loss of the active adsorbents
during the process. As a proof of concept, this composite can
effectively remediate arsenic contaminated water producing potable
water recovery, whereas the conventional fixed bed requires eight
times the amount of active adsorbents to achieve a similar
performance. Looking forward, different functional composites can be
prepared based on specific adsorptive applications, as a wide range of
adsorbents can be loaded into the α-alumina hollow fiber, of which the
micro-channel size and barrier layer pore size can be easily
manipulated during fabrication.

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See more of this Session: Composites for Environmental Applications
See more of this Group/Topical: Materials Engineering and Sciences Division