β‑Cyclodextrin Polymerized in Cross-Flowing Channels of Biomass Sawdust for Rapid and Highly Efficient Pharmaceutical Pollutants Removal from Water
Posted on 2020-07-08 - 11:05
Water
pollution arising from pharmaceuticals has raised great concerns
about the potential risks for biosphere and human health. However,
rapid and efficient removal of pharmaceutical contaminants from water
remains challenging. Wood sawdust, a byproduct of the wood-processing
industry, is an abundant, cost-effective, and sustainable material
with a unique hierarchically porous microstructure. These features
make wood sawdust quite interesting as a filtration material. Here,
we report a novel cross-flow filtration composite based on β-cyclodextrin-polymer-functionalized
wood sawdust (β-CD/WS) in which the pharmaceutical contaminant
water flows through the sawn-off vessel channels and the micropores
on the surface of the cell walls, generating the turbulence. Such
water flow characteristics ensure full contact between pharmaceutical
pollutants and β-CD grafted on the cellulose backbone of wood
sawdust, thereby enhancing the water treatment efficiency. Consequently,
the β-CD/WS filter device shows a high removal efficiency of
over 97.5% within 90 s for various pharmaceutical contaminants including
propranolol, amitriptyline, chlortetracycline, diclofenac, and levofloxacin,
and a high saturation uptake capacity of 170, 156, 257, 159, and 185
mg g–1, respectively. The high-performance wood-sawdust-based
cross-flow filtration opens new avenues for solving the global water
pollution issues, especially those caused by pharmaceutical contaminants.
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Guo, Ruixue; Liu, Hanwen; Yang, Ke; Wang, Shutao; Sun, Panpan; Gao, Hong; et al. (2020). β‑Cyclodextrin Polymerized in Cross-Flowing Channels of Biomass Sawdust for Rapid and Highly Efficient Pharmaceutical Pollutants Removal from Water. ACS Publications. Collection. https://doi.org/10.1021/acsami.0c08729