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Selective and Efficient Removal of Fluoride from Water: In Situ Engineered Amyloid Fibril/ZrO 2 Hybrid Membranes
Author(s) -
Zhang Qingrui,
Bolisetty Sreenath,
Cao Yiping,
Handschin Stephan,
Adamcik Jozef,
Peng Qiuming,
Mezzenga Raffaele
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201901596
Subject(s) - membrane , fluoride , selectivity , chemical engineering , water treatment , nanoparticle , chemistry , ion , fibril , carbon fibers , tap water , ion exchange , materials science , nuclear chemistry , inorganic chemistry , nanotechnology , environmental engineering , organic chemistry , catalysis , composite material , environmental science , biochemistry , composite number , engineering
We report a new strategy for efficient removal of F − from contaminated water streams, and it relies on carbon hybrid membranes made of amyloid fibril/ZrO 2 nanoparticles (<10 nm). These membranes exhibit superior selectivity for F − against various competitive ions, with a distribution coefficient ( K d ) as high as 6820 mL g −1 , exceeding commercial ion‐exchange resins (IRA‐900) by 180 times and outdoing the performance of most commercial carbon‐activated aluminum membranes. At both low and high (ca. 200 mg L −1 ) F − concentrations, the membrane efficiency exceeds 99.5 % removal. For real untreated municipal tap water (ca. 2.8 mg L −1 ) under continuous operating mode, data indicates that about 1750 kg water m −2 membrane can be treated while maintaining drinking water quality, and the saturated membranes can be regenerated and reused several times without decrease in performance. This technology is promising for mitigating the problem of fluoride water contamination worldwide.