Adsorption-desorption and co-migration of vanadium on colloidal kaolinite

Yang, Jin‐yan; Luo, Hou-qiao; Zhu, Yan-Yuan; Yu, Yang; He, Wenyan; Wu, Zhen-zhong; Wang, Bin

doi:10.1007/s11356-020-07845-x

Cited by 13 publications

(4 citation statements)

References 54 publications

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“…Some successful applications of kaolinite treatment have already been reported for soil remediation [23][24][25][26]29,45,49,51,60]. Very limited information about the removal of As and V from kaolinite or kaolinitic soil is available [49,60]. The findings of this study can be considered as a guiding contribution to the field of kaolinitic soil remediation that promotes further research in this field.…”

Section: Soil Remediationmentioning

confidence: 65%

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Optimization of Carboniferous Egyptian Kaolin Treatment for Pharmaceutical Applications

et al. 2022

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This paper quantitatively determines the occurrences of potentially toxic elements in Carboniferous kaolin in southwestern Sinai, Egypt. This research describes, in detail, the experimental treatment optimization to be used in pharmaceutical applications. The concentrations of As, Co, Ni, Pb, and V in these kaolin deposits exceed the Permitted Concentrations of Elemental Impurities for oral use in pharmaceutical applications. Herein, six desorbing agents (acetic acid, citric acid, DTPA, EDDS, EDTA, and NTA) were utilized as extracting solutions in batch-wise extractions to select the proper reagents. Parameters such as the pH, the mixing speed and time, and the solid–solution ratio were varied to optimize the extraction conditions. The findings indicate that citric acid and EDTA were effective in the removal of the aforementioned elements. The results reveal that the optimum removal of potentially toxic elements from kaolin can be achieved using citric acid and EDTA concentrations of 0.2 M and 0.1 M, respectively, for the treatment of 5 g of kaolin, under a pH of 4 for citric acid, and a pH of 10 for EDTA. The ideal mixing speed and time are 500 rpm and 6 h, respectively. Using 1:10 S/L of citric acid and EDTA showed removal rates of 100% for all the investigated PTEs. We recommend this treatment for different kinds of kaolin showing various degrees of contamination.

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Section: Soil Remediationmentioning

confidence: 65%

Section: Soil Remediationmentioning

confidence: 99%

Optimization of Carboniferous Egyptian Kaolin Treatment for Pharmaceutical Applications

et al. 2022

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“…In Table 3, the mass recovery rate of nhexadecane in e uent improved when ow velocity raised from 1 mL/min to 4 mL/min. Some studies also reported an increasing velocity result in an easier transport of contaminations in soil (Jiang et al, 2019;Yang et al, 2020). Macroscopically, the increasing ow velocity caused the decreasing residence of n-hexadecane in OS, CS and NS column, respectively.…”

Section: Effect Of Ph On the Adsorption Isotherm Of N-hexadecane On T...mentioning

confidence: 93%

Transport and retention of n-hexadecane in cadmium-/naphthalene-contaminated calcareous soil sampled in a karst area

Huang

Tang

Liang

et al. 2022

Preprint

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Petroleum hydrocarbon pollutants in karst areas have aroused widespread concern due to their toxicity. It is crucial to gain knowledge on transport and retention of petroleum hydrocarbons in karst areas. Calcareous soils in karst areas were contaminated by cadmium/naphthalene due to the industrial and agricultural activities, however, the fates of petroleum hydrocarbons in these contaminated calcareous soils have been rarely studied. In this study, n-hexadecane was selected as a model petroleum hydrocarbon. Batch experiments were conducted to explore the adsorption behavior of n-hexadecane on cadmium-/naphthalene-contaminated calcareous soils at various pH, and column experiments were performed to investigate the transport and retention of n-hexadecane under various flow velocity. The results showed that Freundlich model can well describe the adsorption behavior of n-hexadecane on all samples (R2>0.9). According to the adsorption coefficient (Kf), the presence of cadmium/naphthalene dramatically increased the adsorption efficiency of n-hexadecane on calcareous soils, and the increasing pH value reduced the adsorption capacity in all groups. The transport of n-hexadecane in all samples were well described by two kinetic sites model of Hydrus-1D with R2>0.9. The higher effluent concentration of n-hexadecane indicates that n-hexadecane can more effectively break through the cadmium-/naphthalene-contaminated calcareous soil with high flow velocity, which means the lower n-hexadecane retention in this situation. The observation can be explained by the electrostatic repulsion between n-hexadecane and each soil sample. These findings have important implications for the government of groundwater in calcareous soils from karst areas.

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“…V(V) has been extracted from aqueous solutions using porous sorbents 7 – 9 , ionic liquids 10 , colloids 11 , 12 , nanoparticles/nanocomposites 13 – 16 , and modified composites 17 , 18 , with impressive capacities ranging from 240 to 712.4 mg g −1 . However, a comprehensive evaluation of material’s selectivity for V(V) in the presence of competing metal ions (Fe(III), Cr(III), Cu(II), Ni(II), Zn(II), etc.)…”

Section: Introductionmentioning

confidence: 99%

A molecular extraction process for vanadium based on tandem selective complexation and precipitation

Osin,

Lin,

Gelfand

et al. 2024

Nat Commun

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Recycling vanadium from alternative sources is essential due to its expanding demand, depletion in natural sources, and environmental issues with terrestrial mining. Here, we present a complexation-precipitation method to selectively recover pentavalent vanadium ions, V(V), from complex metal ion mixtures, using an acid-stable metal binding agent, the cyclic imidedioxime, naphthalimidedioxime (H2CIDIII). H2CIDIII showed high extraction capacity and fast binding towards V(V) with crystal structures showing a 1:1 M:L dimer, [V2(O)3(C12H6N3O2)2]2−, 1, and 1:2 M:L non-oxido, [V(C12H6N3O2)2] ̶ complex, 2. Complexation selectivity studies showed only 1 and 2 were anionic, allowing facile separation of the V(V) complexes by pH-controlled precipitation, removing the need for solid support. The tandem complexation-precipitation technique achieved high recovery selectivity for V(V) with a selectivity coefficient above 3 × 105 from synthetic mixed metal solutions and real oil sand tailings. Zebrafish toxicity assay confirmed the non-toxicity of 1 and 2, highlighting H2CIDIII’s potential for practical and large-scale V(V) recovery.

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Adsorption-desorption and co-migration of vanadium on colloidal kaolinite

Cited by 13 publications

References 54 publications

Optimization of Carboniferous Egyptian Kaolin Treatment for Pharmaceutical Applications

Optimization of Carboniferous Egyptian Kaolin Treatment for Pharmaceutical Applications

Transport and retention of n-hexadecane in cadmium-/naphthalene-contaminated calcareous soil sampled in a karst area

A molecular extraction process for vanadium based on tandem selective complexation and precipitation

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