Highly Efficient Adsorption of Au(III) from Water by a Novel Metal–Organic Framework Constructed with Sulfur-Containing Ligands and Zn(II)

Hu, Chenghong; Xu, Weifeng; Li, Hua; Zhou, Shuxian; Mo, Xiaohui; Zhang, Panliang

doi:10.1021/acs.iecr.9b03433

Cited by 43 publications

(7 citation statements)

References 55 publications

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“…The concentrations of gold in the remaining filtrate were measured by atomic absorption spectroscopy (AA-6880, SHIMADZU, Japan). The amount of adsorbed Au(III) at time t ( q t , mg·g –1 ) and equilibrium (q e , mg·g –1 ) and adsorption ratio ( R %) could be calculated by eqs S1–S3 …”

Section: Methodsmentioning

confidence: 99%

“…The amount of adsorbed Au(III) at time t (q t , mg•g −1 ) and equilibrium (q e , mg•g −1 ) and adsorption ratio (R%) could be calculated by eqs S1−S3. 38 The adsorption selectivity of the MOF for Au was evaluated in three types of complex solutions, in which 5 mg of the MOF was put into a 20 mL complex solution containing different ions. The first type of complex solution is a mixed solution of five elements such as Au(III), Cu(II), Zn(II), Co(II), and Ni(II).…”

Section: ■ Introductionmentioning

confidence: 99%

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Cr-Based MOF for Efficient Adsorption of Au at Low Concentrations

Tang

2022

Langmuir

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The efficient enrichment and selection of Au are crucial for gold recovery. The adsorption technology is considered to have potential due to the advantages of operation simplicity and green processability. Nevertheless, the poor Au selectivity at low concentrations in complex solutions limits the further application of the adsorption technology. In this work, a novel Cr-based MOF adsorbent was successfully synthesized using 1,2,4-triazole and 4-aminobenzoic acid as ligands. Benefitting from the surface positive charge and extensive chelation and reduction sites, the novel Cr-based MOF exhibited a total adsorption capacity of up to 357 mg/g and excellent adsorption selectivity toward Au(III) in the complex metal mixed solutions, such as simulated sewage ash waste liquid and actual e-waste leachate. Furthermore, the adsorption kinetics, isotherms, and thermodynamics were discussed in depth for investigating the adsorption mechanisms of the MOF. The PXRD and XPS analyses reveal that the adsorption process involves complexation, redox, and electrostatic interactions. We believe that this study of novel Cr-based MOF adsorbents for efficient Au adsorption is meaningful for further application in the gold recovery technology from e-waste.

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Section: Methodsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Cr-Based MOF for Efficient Adsorption of Au at Low Concentrations

Tang

2022

Langmuir

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“…84 A novel MOF material 2,5-TP was synthesized by one-pot treatment of sulfur containing ligands and Zn(II) to achieve excellent Au III adsorption performance relying on the formation of Au−S and Zn−O−Au bonds. 85 The maximum adsorption capacity of 2,5-TP for Au III was up to 1253.5 mg• g −1 with an adsorption ratio of 97%, which were superior to the MOFs containing sulfur groups fabricated through post modification. Cr-MIL-101-NH 2 and Cr-MIL-101-NO 2 were also found to have good adsorption capacities toward PdCl 4 2− and PtCl 6 2− .…”

mentioning

confidence: 87%

“…Li and co-workers further introduced anion-exchangeable polymers into the host cavities of ZIF-8 for effective Au(CN) 2– extraction . A novel MOF material 2,5-TP was synthesized by one-pot treatment of sulfur containing ligands and Zn(II) to achieve excellent Au III adsorption performance relying on the formation of Au–S and Zn–O–Au bonds . The maximum adsorption capacity of 2,5-TP for Au III was up to 1253.5 mg·g –1 with an adsorption ratio of 97%, which were superior to the MOFs containing sulfur groups fabricated through post modification.…”

Section: Mof-based Ion Adsorptionmentioning

confidence: 99%

Zirconium Metal–Organic Framework Materials for Efficient Ion Adsorption and Sieving

Hou

Wang

Zhang

2020

Ind. Eng. Chem. Res.

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Zirconium metal−organic framework (Zr-MOF) materials with excellent ion adsorption capacities and efficient ion sieving properties are highly desirable for many important industrial separation applications. There has been significant progress in the fabrication of Zr-MOF-based ion adsorbents and ion sieving membranes in recent years for efficient removal of toxic ions and/or recovery of precious metal ions from water. These Zr-MOF materials possess uniform pore sizes, high porosities, and specific functional groups for enhancing ion adsorption capacity, ion selectivity, and ion conductivity. Recent advances in the fabrication of advanced Zr-MOF-based ion adsorbents for removal of toxic cations and anions from water are summarized. Following this, recent achievements of high-quality Zr-MOF membranes/channels for efficient ion sieving are highlighted and discussed in detail. Finally, a summary and some perspectives of future developments and challenges in this exciting research field are presented.

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“…It should be pointed out here that, obviously, some authors have not read the original paper by Sips, or even seen it, because they quote a title which is erroneous. Indeed, the article is entitled “On the structure of a catalyst surface” and not “Combined form of Langmuir and Freundlich equations” as one often sees! − ,− Additionally, the Sips equation is sometimes referred to as “the Langmuir–Freundlich equation”. This could be due to the fact that in the abstract of his second article Sips writes about the equation he established and which now bears his name: “this simplest isotherm is a generalization of both the Freundlich and the Langmuir isotherms”.…”

Section: Isotherm Equationsmentioning

confidence: 99%

Mirror, Mirror on the Wall, Which Is the Fairest of Them All? Comparing the Hill, Sips, Koble–Corrigan, and Liu Adsorption Isotherms

Chu

Debord

Harel

et al. 2022

Ind. Eng. Chem. Res.

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Experimental equilibrium data for the adsorption of water contaminants on solid surfaces are generally correlated using suitable isotherm expressions. In most cases, adsorption isotherms are used empirically with the primary aim of finding the best fitting ones. The literature of adsorptive water decontamination is replete with such isotherm comparisons, usually evaluated on the basis of some statistical metrics such as R 2 and RMSE. For example, several studies have compared and ranked the isotherm equations of Hill, Sips, Koble−Corrigan, and Liu. These comparative evaluations imply that the four isotherms possess different data fitting abilities, and consequently it is possible to identify the most accurate one. The present study argues that this commonly held notion is incorrect. It demonstrates that the four isotherms provide the same results when fitted to three previously published data sets. This finding suggests that the four isotherms are mathematically equivalent despite apparent differences in their formulations. Indeed, a mathematical analysis unequivocally shows that the Hill, Sips, Koble−Corrigan, and Liu isotherms can be represented by a single generic equation with three arbitrary fitting parameters. As such, the four isotherms must provide exactly the same fit to a given set of isotherm data.

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Highly Efficient Adsorption of Au(III) from Water by a Novel Metal–Organic Framework Constructed with Sulfur-Containing Ligands and Zn(II)

Cited by 43 publications

References 55 publications

Cr-Based MOF for Efficient Adsorption of Au at Low Concentrations

Cr-Based MOF for Efficient Adsorption of Au at Low Concentrations

Zirconium Metal–Organic Framework Materials for Efficient Ion Adsorption and Sieving

Mirror, Mirror on the Wall, Which Is the Fairest of Them All? Comparing the Hill, Sips, Koble–Corrigan, and Liu Adsorption Isotherms

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