Adsorption of Y(III) on the Interface of Kaolinite-H2O: A DFT Study

Zeng, Xiangrong; Zeng, Bin; Huang, Lijinhong; Zhong, Liang; Li, Xindong; Huang, Wanfu

doi:10.3390/min12091128

Cited by 11 publications

(11 citation statements)

References 41 publications

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“…A codon was identi ed as an optimal codon when it exhibited signi cantly more frequent occurrence in the high-expression gene pool than in the low-expression genes [37]. RSCU values are often used to identify optimal codons [47]. Here, we have chosen the codons with RSCU > 1 as the optimal codons.…”

Section: Identi Cation Of Optimal Codonsmentioning

confidence: 99%

Comparative Analysis of Codon Usage Bias in Chloroplast Genomes of Ten Medicinal Species of Rutaceae

Shen

Chen²,

Liang

et al. 2023

Preprint

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Rutaceae family comprises economically important plants due to their extensive applications in spices, food, oil, medicine, etc. Better utilization of Rutaceae plants through biotechnology. Modern biotechnological approaches majorly rely on the heterologous expression of functional proteins in different vectors; however, several proteins are difficult to express outside their native environment. The expression potential of functional genes in heterologous systems can be maximized by replacing the rare synonymous codons in the vector with preferred optimal codons of functional genes. Codon usage bias plays an essential role in biogenetic engineering-based research and development. In the current study, 727 coding sequences (CDSs) obtained from the chloroplast genomes of ten Rutaceae plant family members were analyzed for codon usage bias. The nucleotide composition analysis of codons showed that these codons were rich in A/T(U) bases and preferred A/T(U) endings. Analyses of neutrality plots, effective number of codons (ENC) plots, and correlations between ENC and codon adaptation index (CAI) were conducted, which revealed that natural selection is a major driving force for the Rutaceae plant family’s codon usage bias, followed by base mutation. In the ENC vs. CAI plot, we observed that codon usage bias in the Rutaceae family had little relationship with gene expression level. For each sample, we screened 12 codons as preferred and high-frequency codons simultaneously, of which GCU encoding Ala, UUA encoding Leu, and AGA encoding Arg were the most preferred codons. Taken together, our study unraveled the synonymous codon usage pattern in the Rutaceae family, which may provide valuable information for the genetic engineering of Rutaceae plant species in the future.

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Section: Identi Cation Of Optimal Codonsmentioning

confidence: 99%

Comparative Analysis of Codon Usage Bias in Chloroplast Genomes of Ten Medicinal Species of Rutaceae

Shen

Chen²,

Liang

et al. 2023

Preprint

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“…Rare earth elements (REEs) are composed of scandium (Sc), yttrium (Y), and 15 lanthanide elements [1,2]. Rare earths are widely used in the metallurgical industry, luminescent materials, agriculture, and other fields because of their unique 4f -layer electronic structure and good optical, electrical, and magnetic properties [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…Then, the RE ions adsorbed on the clay minerals are exchanged and leached from top to bottom [12]. When ammonium salt is utilized as the leaching agent [13,14], the ion exchange reaction equation is represented in Formula (1). The advantage of the in situ leaching process is that it no longer requires "mountain moving", thereby protecting the mountain, improving the utilization rate of RE resources, and achieving efficient rare earth recovery [15,16].…”

Section: Introductionmentioning

confidence: 99%

Optimization of a Rare Earth and Aluminum Leaching Process from Weathered Crust Elution-Deposited Rare Earth Ore with Surfactant CTAB

Wu,

Feng,

Zhou

et al. 2024

Minerals

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Ammonium sulfate is typically employed as a leaching agent in the in situ leaching of weathered crust elution-deposited rare earth ore. However, it is associated with challenges such as low efficiency in mass transfer for rare earth (RE) leaching, high usage of the leaching agent, and prolonged leaching duration. To address the issues mentioned above, the surfactant cetyltrimethyl ammonium bromide (CTAB) was compounded with 2% ammonium sulfate to form a leaching agent in this paper. The effects of CTAB concentration, temperature, pH, and leaching agent flow rate on the rare earth (RE) and aluminum (Al) leaching mass transfer process from RE ore were investigated using chromatographic plate theory. The results revealed that CTAB addition improved the RE mass transfer process while moderately inhibiting the Al mass transfer efficiency. Increasing the temperature and pH of the leaching solution led to higher theoretical plate numbers for RE and Al leaching, lowered theoretical plate height (HETP), and enhanced leaching mass transfer efficiency. However, under high temperature and alkaline conditions, the mass transfer efficiency begins to decrease, indicating that high temperature and alkaline conditions are not conducive to the synergistic enhancement of RE and Al leaching by CTAB. Considering that clay minerals have good pH buffering properties, adjusting the pH of the leaching solution during rare earth ore leaching operations was deemed unnecessary. The optimal mass transfer conditions for leaching RE and Al were identified as 2% ammonium sulfate concentration, 0.00103 mol/L CTAB concentration, pH range of 5.2–5.5 for the leaching solution, 0.6 mL/min leaching solution flow rate, and room temperature. The rare earth leaching mass transfer effect could be enhanced during summer operations.

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“…Of particular significance are the heavy REEs (HREEs), which possess unparalleled value as they are irreplaceable on rockets, satellites, aircraft carriers, and fighters. Ion-adsorption deposits (IADs) of REEs are the main source of HREEs and provide more than 90% production [3,4], where REEs are absorbed onto clay minerals in the weathering crust soil of the IADs ore as ions or hydrated ions [5,6]. The adsorbed REEs can be desorbed and transported by adding leaching agents (e.g., highly concentrated electrolyte solutions).…”

Section: Introductionmentioning

confidence: 99%

Recovery of Rare Earth Elements from Ion-Adsorption Deposits Using Electrokinetic Technology: The Soil Conductivity Mechanism Study

Kang,

Ling,

Liang

et al. 2024

Minerals

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Rare earth elements (REEs) are essential raw materials for modern industries but mining them has caused severe environmental issues, particularly the recovery of heavy REEs (HREEs) from ion-adsorption deposits (IADs). Very recently, an emerging technology, electrokinetic mining (EKM), has been proposed for the green and efficient recovery of REEs from IADs. However, the conduction mechanism of the weathering crust soil, which is also a prerequisite for EKM, remains unclear, making the EKM process unpredictable. Here, we systematically investigated the conductivity of weathering crust soil in the presence of light REEs (LREEs, i.e., La3+ and Sm3+) and HREEs (Er3+ and Y3+), respectively. Results suggested that the voltage was dynamically and spatially redistributed by the movement of REEs and water during EKM, and the conventional assumption of the linear distribution of voltage leads to an inaccurate description of soil voltage. We proposed an improved Archie’s equation by coupling the mechanisms of liquid phase and solid-liquid interface conduction, which can predict soil conductivity more precisely. Moreover, the extended Archie’s equation is able to recalculate the voltage distribution at distinct times and spaces well during EKM. More importantly, the water content in field-scale weathered-crust soils can be retrieved by the newly proposed Archie’s equation, which helps optimize the leaching wells and improve the recovery rate of REE. This study focuses on the conduction mechanism of weathering crust soil, which provides a theoretical basis for better use of the EKM technology and promotes mining efficiency fundamentally.

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Adsorption of Y(III) on the Interface of Kaolinite-H2O: A DFT Study

Cited by 11 publications

References 41 publications

Comparative Analysis of Codon Usage Bias in Chloroplast Genomes of Ten Medicinal Species of Rutaceae

Comparative Analysis of Codon Usage Bias in Chloroplast Genomes of Ten Medicinal Species of Rutaceae

Optimization of a Rare Earth and Aluminum Leaching Process from Weathered Crust Elution-Deposited Rare Earth Ore with Surfactant CTAB

Recovery of Rare Earth Elements from Ion-Adsorption Deposits Using Electrokinetic Technology: The Soil Conductivity Mechanism Study

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