Selective uranium sorption from salt lake brines by amidoximated Saccharomyces cerevisiae

Bai, Jing; Yin, Xiaobin; Zhu, Yongfeng; Fan, Fangli; Wu, Xianxin; Tian, Wei; Tan, Cunmin; Zhang, Xin; Wang, Yang; Cao, Shiwei; Fan, Fuyou; Qin, Zhi; Guo, Junjun

doi:10.1016/j.cej.2015.08.011

Cited by 75 publications

(15 citation statements)

References 34 publications

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“…According to previous studies, the absorption peaks at 2244 and 1730 cm –1 correspond to the CN stretching vibration and carbonyl groups of PAN beads. , In comparison with pure PAN bead, surface amidoximation modified with hydroxylamine hydrochloride led the intensity of characteristic absorption peak of CN at 2240 cm –1 to be weakened. As noted, new absorption peaks appear at 922 and 1650 cm –1 for the sample AOPAN, which should be attributed to the N–O and CN bond vibrations. , Although the characteristic peak within the scope of 1600–1700 cm –1 appears in four samples, the peak intensity of AOPAN and Mn–AOPAN was much higher than that of PAN and Mn–PAN, mainly due to the new and strong adsorption peak of CN stretching at 1650 cm –1 overlapping with the CC stretching (1660 cm –1 ) and −OH bending vibration peaks. , Moreover, the absorption peaks for AOPAN between 3500 and 3000 cm –1 are observed to be broader and stronger than that for PAN, which was assigned to the N–H and O–H stretching vibration. As reported in previous studies, the characteristic peak at 3200 cm –1 is attributed to the N–H stretching vibration. , In comparison with the samples PAN and Mn–PAN, it is clear that the stronger peak around 3200 cm –1 appears in the spectra of both AOPAN and Mn–AOPAN, which well indicates that the vibration of −NH 2 occurred on the amidoxime-modified PAN.…”

Section: Results and Discussionmentioning

confidence: 76%

“…As noted, new absorption peaks appear at 922 and 1650 cm −1 for the sample AOPAN, which should be attributed to the N−O and CN bond vibrations. 35,36 Although the characteristic peak within the scope of 1600−1700 cm −1 appears in four samples, the peak intensity of AOPAN and Mn−AOPAN was much higher than that of PAN and Mn−PAN, mainly due to the new and strong adsorption peak of CN stretching at 1650 cm −1 overlapping with the CC stretching (1660 cm −1 ) and −OH bending vibration peaks. 37,38 Moreover, the absorption peaks for AOPAN between 3500 and 3000 cm −1 are observed to be broader and stronger than that for PAN, which was assigned to the N−H and O−H stretching vibration.…”

Section: Resultsmentioning

confidence: 88%

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Self-Assembly of Mn(II)-Amidoximated PAN Polymeric Beads Complex as Reusable Catalysts for Efficient and Stable Heterogeneous Electro-Fenton Oxidation

Qin

Zhang

et al. 2019

ACS Appl. Mater. Interfaces

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A facile postsynthetic amidoxime modification method was reported on the preparation of transition-metal ions (Mn, Fe, and Co)−polyacrylonitrile (PAN) polymeric beads complex as reusable catalysts for efficient and stable heterogeneous electro-Fenton oxidation. Through one-step phase inversion, low-cost and chemically resistant polymeric PAN beads were fabricated on a large scale with controllable sizes and abundant porous structure. The postfunctionalization strategy led more active sites to be uniformly distributed into modified PAN beads owing to the favorable channel confined effect and chelate coordination. Compared with pure PAN beads, the modified composite catalysts exhibited remarkably higher activity and stability in electro-Fenton oxidation over wide pH range of 3−10 without any addition of H 2 O 2 . By analysis, the grafted amidoxime group was extremely beneficial for improving metal loading and binding force between active sites and organic supports, which accelerated the active sites autocatalytic cycle to promote H 2 O 2 activation by means of excited electron transfer from composites' functional groups. The catalytic activity of Mn−amidoximated PAN evaluated by the turnover frequency was 15 times more than that of traditional iron oxide and very competitive to the reported metal−organic framework-based composites. Moreover, a strong metal and polymeric support interaction significantly enhanced the stabilization of active sites dispersed in porous matrix and solved the ever-present problem of metallic ions leaching to the greatest extent. The scalable introduction of functionalities into sophisticated structures after host framework synthesis will bring valuable insights to develop highly efficient and stable heterogeneous catalysts for green electrochemical oxidation in practical application.

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Section: Results and Discussionmentioning

confidence: 76%

Section: Resultsmentioning

confidence: 88%

Self-Assembly of Mn(II)-Amidoximated PAN Polymeric Beads Complex as Reusable Catalysts for Efficient and Stable Heterogeneous Electro-Fenton Oxidation

Qin

Zhang

et al. 2019

ACS Appl. Mater. Interfaces

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“…Sodaye et al 27 presented schemes for recovery of U from brine concentrate discharged from integrated nuclear desalination plants; however, no experimental work was performed. Bai et al 28 studied uranium extraction from brines of a salt lake using amidoximated Saccharomyces cerevisiae . It was concluded the amidoximated biomass can effectively adsorb trace uranium in brine samples.…”

Section: Introductionmentioning

confidence: 99%

Direct uranium recovery from brine concentrate using amidoxime adsorbents for possible future energy source

et al. 2020

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Summary Recovery of uranium from concentrated brine rejection from a small seawater reverse osmosis plant in Thailand using four types of the amidoxime adsorbents was experimentally performed. Adsorbents were directly submerged in continuously flowing discharged brine concentrate. Studied adsorbents were amidoximated polymer gel prepared from gamma irradiation, amidoximated polymer gel prepared from UV radiation curing, amidoximated polyacrylonitrile fibers, and chromic‐acid‐treated low‐density polyethylene fibers grafted with amidoxime functional group using gamma radiation. Uranium concentration in brine concentrate and input seawater was analyzed to be 4.8 and 3.1 ppb, respectively. Gel adsorbent synthesized by gamma irradiation exhibited the highest uranium loading capacity of 1.39 mg/g‐ad with 20 000 L/h rejected brine flow‐rate after 6 weeks of soaking. The estimated uranium recovery cost is 406.81 USD/kg uranium. If the adsorption capacity was increased to 2 mg/g‐ad, the projected cost was reduced to 338.95 USD/kg. Under this land‐based recovery scheme, no work is performed in an open ocean environment, thus, ensuring safety and reducing cost and time, especially the costs associated with ships, personnel, and diesel fuel to bring the materials to the ocean and back to the shore. The present study demonstrates that direct uranium recovery from discharged brine concentrate is possible using amidoxime‐based adsorbents developed to study uranium extraction from natural seawater. This should pave the way for further experimental studies in larger seawater reverse osmosis (SWRO) plants for the possible future energy source. A proposed large‐scale, yet very simple, deployment strategy at a hypothetical SWRO plant is also presented. Novelty statement Successful uranium adsorption by directly submerging adsorbents in continuously flowing discharged brine concentrate from seawater reverse osmosis plant Mooring and recovery costs largely eliminated because of land‐based deployment Highest uranium uptake capacity of 1.39 mg/g adsorbent after 6 weeks of soaking

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“…Biosorption, as an alternative method to traditional disposal, has attracted much interest for its high adsorption capacity, low production costs and reduced slurry production [16][17]. In recent years, uranium biosorption by various microorganisms (i.e., bacteria, fungi, yeast, and algae) were reported [18][19][20][21][22] in different laboratories.…”

Section: Introductionmentioning

confidence: 99%

Reduction and Enrichment of Uranium after Biosorption on Inactivated <i>Saccharomyces cerevisiae</i>

Zhang¹,

Dong²,

Liu³

et al. 2020

Pol. J. Environ. Stud.

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Microorganisms not only have a strong biosorption capacity but also can achieve tremendous volume reduction effects for radionuclide wastes. Batch experiments were conducted to investigate the biosorption characteristics of uranium on inactivated Saccharomyces cerevisiae and the volume reduction and enrichment of uranium after biosorption were also studied in combination with the ashing method. The results revealed that inactivated S. cerevisiae biomass was able to adsorb uranium. The maximum removal efficiency and biosorption capacity for uranium were 96.8% and 31.8 mg/g, respectively. The optimum pH for U(VI) removal was 2.75 and U(VI) biosorption was well described by the Freundlich isotherm model. Thermodynamic investigations showed that biosorption of U(VI) on inactivated S. cerevisiae was a spontaneous and endothermic process. In the kinetic studies, U(VI) adsorption on inactivated S. cerevisiae reached an equilibrium in 60 min and followed a pseudo-secondorder kinetics model. The 100 mg/L of uranium was reduced to less than 0.05 mg/L after 6 rounds gradient descent adsorption, which was enough to meet the National uranium wastewater discharge standards. The ashing experiment demonstrated that ashing process resulted in a large volume and weight reduction ratio as well as enrichment for uranium in the ash. XRD results showed that the species of uranium that existed in the ash were uranium phosphate and KPUO 6 •3H 2 O. Waste volume reduction and metal enrichment can be obtained by ashing treatment of the biological absorbent. The method may be beneficial for nuclide and heavy metal disposal treatment in many fields.

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Selective uranium sorption from salt lake brines by amidoximated Saccharomyces cerevisiae

Cited by 75 publications

References 34 publications

Self-Assembly of Mn(II)-Amidoximated PAN Polymeric Beads Complex as Reusable Catalysts for Efficient and Stable Heterogeneous Electro-Fenton Oxidation

Self-Assembly of Mn(II)-Amidoximated PAN Polymeric Beads Complex as Reusable Catalysts for Efficient and Stable Heterogeneous Electro-Fenton Oxidation

Direct uranium recovery from brine concentrate using amidoxime adsorbents for possible future energy source

Reduction and Enrichment of Uranium after Biosorption on Inactivated <i>Saccharomyces cerevisiae</i>

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