Construction of Deino-flr-2 radiation-tolerant genetically engineered strain containing flr-2 fluoride-tolerant gene and its enrichment behavior for U(VI)

Luo, Jiaqi; Zhu, Qiqi; Li, Shanshan; Chen, Fang; Xiao, Fangzhu; Peng, Guowen

doi:10.1007/s10967-021-07697-w

Cited by 5 publications

(1 citation statement)

References 36 publications

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“…[ 7 ] Moreover, uranium extraction from natural seawater suffers from numerous competing ions, biological fouling, and harsh marine environments. [ 8 ] In response to these difficulties, different methods, including ion exchange, [ 9 ] adsorption, [ 10 ] chemical precipitation, [ 11 ] and biological capture, [ 12 ] have been developed to realize marine uranium uptake. Among them, adsorption has been identified as the most promising approach for industrial application in terms of economic feasibility and simple operation.…”

Section: Introductionmentioning

confidence: 99%

Yeast‐Raised Polyamidoxime Hydrogel Prepared by Ice Crystal Dispersion for Efficient Uranium Extraction from Seawater

Wang,

Yao,

Yuan

et al. 2024

Advanced Science

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Uranium extraction from seawater has attracted worldwide attention due to the massive reserves of uranium. Due to the straightforward synthesis and strong affinity toward uranyl ions (UO22+), the amidoxime group shows promise for use in highly efficient uranium capture. However, the low mass transfer efficiency within traditional amidoxime‐based adsorbents severely limits the adsorption rate and the utilization of adsorption sites. In this work, a macroporous polyamidoxime (PAO) hydrogel is prepared by yeast‐based biological foaming combined with ice crystal dispersion that effectively maintained the yeast activity. The yeast‐raised PAO (Y‐PAO) adsorbent has numerous bubble‐like holes with an average pore diameter >100 µm. These macropores connected with the intrinsic micropores of PAO to construct efficient diffusion channels for UO22+ provided fast mass transporting channels, leading to the sufficient exposure of hidden binding sites. The maximum adsorption capacity of Y‐PAO membrane reached 10.07 mg‐U/g‐ads, ≈1.54 times higher than that of the control sample. It took only eight days for Y‐PAO to reach the saturation adsorption capacity of the control PAO (6.47 mg‐U/g‐ads, 28 days). Meanwhile, Y‐PAO possessed excellent ion selectivity, good reusability, and low cost. Overall, the Y‐PAO membrane is a highly promising adsorbent for use in industrial‐scale uranium extraction from seawater.

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