Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 422, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2021.126872
Keywords
Adsorption; ZIF; Amidoxime; U (VI); Wastewater; Antimicrobial
Categories
Funding
- National Nat-ural Science Foundations of China [21576060, 21574033, 51373044]
- Decommissioning of Nuclear Facilities and Special Funds for Radioac-tive Waste Management, China [[2017] 955]
- Fundamental Research Funds for the Central Universities [3072021CFT1004]
- Foundation of Heilongjiang Postdoctoral Science Foundation [LBHZ17050]
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ZIF-90-AO is an efficient U(VI) adsorbent with high adsorption capacity, good selectivity and regeneration properties, as well as excellent antimicrobial activity.
Herein, a dual-function Zeolitic Imidazole Frameworks (ZIFs) ZIF-90 grafted with malononitrile by Knoevenagel reaction and following with an amidoximation reaction to form an efficient U (VI) adsorbent (ZIF-90-AO). The strong chelation power of amidoxime groups (AO) with uranium and ZIF-90's mesoporous structure afforded ZIF-90-AO high maximum uranium adsorption capacity of 468.3 mg/g (pH = 5). In addition, the factors affecting uranium adsorption process were investigated by a batch of adsorption tests under different adsorption conditions. ZIF-90-AO displayed good selectivity to UO22+ in the solution containing multiple co-existing ions and good regeneration property. More importantly, ZIF-90-AO showed excellent antimicrobial property against both E. coli and S. aureus. Therefore, ZIF-90-AO is a U-adsorbent with great application value for removing U (VI) from wastewater due to the high U (VI) adsorption capacity in weak acid condition and good anti-biofouling properties.
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