Removal of uranium by biogenetic jarosite coupled with photoinduced reduction in the presence of oxalic acid: a low-cost remediation technology

Wei, Hongfu; Dong, Faqin; Chen, Mulan; Zhang, Wei; He, Miao; Liu, Mingxue

doi:10.1007/s10967-020-07125-5

Cited by 13 publications

(2 citation statements)

References 65 publications

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“…The complexation process of Zn(bpy)(ox) 2 was probed by Fourier transform infrared spectroscopy (FTIR) and is shown in Figure S2. The characteristic peaks of hydroxyl (O–H) at 3427 cm –1 and carbonyl (CO) at 1691 cm –1 in oxalic acid were dismissed while the stretching vibration features of 2,2′-pyridine at 1580 cm –1 (attributed to CC pyridine ring vibrations), 1448 cm –1 (attributed to CN pyridine ring vibrations) simultaneously shifted to 1605–1678 cm –1 due to the chelation with Zn 2+ . The molecular structure of the oxalate-chelated organozinc compound was revealed by combining X-ray diffraction (XRD) analysis and theoretical simulation.…”

Section: Resultsmentioning

confidence: 99%

Strain-Induced Self-Assembly at Interface of Two-Dimensional Heterostructures Boosts CO₂ Reduction to Methanol by H₂O

Cheng,

Cao,

Wang

et al. 2024

ACS Nano

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CO 2 conversion with pure H 2 O into CH 3 OH and O 2 driven by solar energy can supply fuels and life-essential substances for extraterrestrial exploration. However, the effective production of CH 3 OH is significantly challenging. Here we report an organozinc complex/MoS 2 heterostructure linked by well-defined zinc−sulfur covalent bonds derived by the structural deformation and intensive coupling of d x 2 − y 2 (Zn)-p(S) orbitals at the interface, resulting in distinctive charge transfer behaviors and excellent redox capabilities as revealed by experimental characterizations and firstprinciple calculations. The synthesis strategy is further generalized to more organometallic compounds, achieving various heterostructures for CO 2 photoreduction. The optimal catalyst delivers a promising CH 3 OH yield of 2.57 mmol g cat −1 h −1 and selectivity of more than 99.5%. The reverse water gas shift mechanism is identified for methanol formation. Meanwhile, energy-unfavorable adsorption of methanol on MoS 2 , where the photogenerated holes accumulate, ensures the selective oxidation of water over methanol.

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Section: Resultsmentioning

confidence: 99%

Strain-Induced Self-Assembly at Interface of Two-Dimensional Heterostructures Boosts CO₂ Reduction to Methanol by H₂O

Cheng,

Cao,

Wang

et al. 2024

ACS Nano

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“…Thus, the contact between bacteria and minerals was impeded. Consequently, the leaching of uranium was restricted (Wei et al, 2020 ). As can been seen in Table 2 , the elements Al, Na and Mn were dissolved into the leach liquor simultaneously, resulting in a decrease of the content in the leaching residues.…”

Section: Resultsmentioning

confidence: 99%

Sulfur enhancement effects for uranium bioleaching in column reactors from a refractory uranium ore

Yang

et al. 2023

Front. Microbiol.

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The feasibility of sulfur enhancement for uranium bioleaching in column reactors was assessed with a designed mixed Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans and Leptospirillum ferriphilum from a refractory uranium ore. The uranium extraction reached 86.2% with the sulfur enhancement (1 g/kg) in 77 days leaching process, increased by 12.6% vs. the control without sulfur addition. The kinetic analysis showed that uranium bioleaching with sulfur enhancement in columns followed an internal diffusion through the product layer-controlled model. Ore residue characteristics indicated that sulfur enhancement could strengthen the porosity of passivation layer, improving the ore permeability. Notably, bacterial community analysis showed that sulfur enhancement at 1 g/kg could make the iron-oxidizing and sulfur-oxidizing bacteria on the ore surface maintain a good balance (approx. 1:1), and thus decomposing ore more effectively. Lastly, a possible mechanism model for uranium bioleaching with sulfur enhancement was proposed.

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Occurrence and remediation of naturally occurring radioactive materials in Nigeria: a review

et al. 2021

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Radioactive compounds are released in the environment by several anthropogenic activities, however, studies reveal that naturally occurring radioactive materials are responsible for over 80% of human exposure to ionizing radiation. Reports suggest that there are severe health risks associated with exposure to elevated concentrations of radioactive materials, such as potassium ( 40 K), uranium ( 238 U and 235 U), and thorium ( 232 Th). The rarity of comprehensive reviews addressing the occurrence, risk assessment, and potential remediation strategies of radioactive pollution in Nigerian environments propelled the collection of data over the last decade. Concentration as high as 2.42 ± 0.28 Bq/L has been reported in rivers in Nigeria, much higher than the radionuclide permissible level of 1 Bq/L. There are emerging concerns as activity concentrations of gamma-emitting radioactive materials found in soils are higher than worldwide average crustal values based on several reports. In many cases, the absorbed air dose rates were also greater (i.e., 86.44 nGy hr -1 ) than acceptable limits (60 nGy hr -1 ) except for few study areas. The level of radionuclides reported is indicative of the type of parent rocks and mineral composition of the studied area. Advances in remediation technologies suggest that electroremediation, bioremediation, and adsorption are the most efficient remedial approach for decontamination of radiochemical polluted sites. There is a need to explore an integrated synergistic approach for sustainable remediation of heavily polluted sites and in the light of environmental protection, attention must be given to areas with high levels of radioactive pollution. This review seeks to bridge information gaps towards ensuring that radioactive materials do not destroy our ecosystem.

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Removal of uranium by biogenetic jarosite coupled with photoinduced reduction in the presence of oxalic acid: a low-cost remediation technology

Cited by 13 publications

References 65 publications

Strain-Induced Self-Assembly at Interface of Two-Dimensional Heterostructures Boosts CO₂ Reduction to Methanol by H₂O

Strain-Induced Self-Assembly at Interface of Two-Dimensional Heterostructures Boosts CO₂ Reduction to Methanol by H₂O

Sulfur enhancement effects for uranium bioleaching in column reactors from a refractory uranium ore

Occurrence and remediation of naturally occurring radioactive materials in Nigeria: a review

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Removal of uranium by biogenetic jarosite coupled with photoinduced reduction in the presence of oxalic acid: a low-cost remediation technology

Cited by 13 publications

References 65 publications

Strain-Induced Self-Assembly at Interface of Two-Dimensional Heterostructures Boosts CO2 Reduction to Methanol by H2O

Strain-Induced Self-Assembly at Interface of Two-Dimensional Heterostructures Boosts CO2 Reduction to Methanol by H2O

Sulfur enhancement effects for uranium bioleaching in column reactors from a refractory uranium ore

Occurrence and remediation of naturally occurring radioactive materials in Nigeria: a review

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Product

Resources

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Strain-Induced Self-Assembly at Interface of Two-Dimensional Heterostructures Boosts CO₂ Reduction to Methanol by H₂O

Strain-Induced Self-Assembly at Interface of Two-Dimensional Heterostructures Boosts CO₂ Reduction to Methanol by H₂O