4.7 Article

Porous and biofouling-resistant amidoxime-based hybrid hydrogel with excellent interfacial compatibility for high-performance recovery of uranium from seawater

期刊

出版社

ELSEVIER
DOI: 10.1016/j.seppur.2022.120571

关键词

Uranium recovery; Amidoxime; Freeze-thawing; Hydrogel; Anti-biofouling

资金

  1. Foundation of NSFC-CONICFT Joint Project [51961125207]
  2. National Natural Science Foundation of China [22008018]
  3. China Postdoctoral Science Foundation [2020 M670716]
  4. Liaoning Province Xingliao Talent Plan Outstanding Talent Project [XLYC1901004]
  5. Natural Science Foundation of Liaoning Province [2020-MS-272]
  6. Innovation Support Program for High-level Talents of Dalian (Top and Leading Talents) [201913]
  7. Foundation of Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, College of Light Industry and Food Engineering, Guangxi University [2021KF08]
  8. Dalian City Outstanding Talent Project [2019RD13]
  9. Start-up Fund for Doctoral Research of Dalian Polytechnic University [2020-07]
  10. Foundation of State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences [KF201914]
  11. Foundation of Key Laboratory of State Forestry and Grassland Administration for Plant Fiber Functional Materials [2020KFJJ06]

向作者/读者索取更多资源

In this study, a facile and eco-friendly freeze-thawing strategy was used to create a physically crosslinked poly(amidoxime)-chitosan hybrid hydrogel with excellent uranium uptake capacity and good biofouling-resistant activity. The hydrogel showed superior uranium uptake capacity and antibacterial property, making it an efficient adsorbent for uranium recovery from seawater.
For a massive uranium recovery from seawater, designing an adsorbent with ultrahigh uranium uptake capacity and good biofouling-resistant activity is crucial, but difficult. Here, a facile and eco-friendly freeze-thawing strategy was explored for the first time to create a physically crosslinked poly(amidoxime) (PAO)-chitosan (CS) hybrid hydrogel (PAO@CHM) with excellent interfacial compatibility, superior uranium uptake capacity and good anti-biofouling activity. The porous 3D network architecture of PAO@CHM, combined with its good hydrophilicity as well as antibacterial property, synergistically constructs numerous hydrophilic and biofoulingresistant ion channels for the rapid diffusion of uranyl ions into the interior of the hydrogel, achieving maximum use of adsorption active sites on PAO@CHM. Consequently, superior uranium uptake capacities (743.87, 865.27, and 1091.53 mg g(-1) for PAO fixed on hydrogel) were obtained in 8, 16, and 32 ppm U-spiked water, respectively. Benifiting from the enhanced uranium adsorption activity and good antibacterial property, the uranium extraction capacity of PAO@CHM reached 7.46 mg g(-1) after 28 days of exposure in 500 L of natural seawater, which is significantly higher than that of most of adsorbents. The O and N atoms in amidoxime group act as main bonding sites for uranium uptake. The finding of this study provides a facile and eco-friendly strategy to construct hydrophilic and biofouling-resistant amidoxime-based adsorbent for efficient uranium recovery from seawater.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据