Selective recovery of Ag(I) from industrial wastewater using zeolite imidazolate framework-8: performance and mechanisms

Hu, Chenghong; Kang, Shuangjian; Xiong, Biquan; Zhou, Shuxian; Tang, Kewen

doi:10.1007/s11356-019-04674-5

Cited by 12 publications

(9 citation statements)

References 44 publications

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“…Besides, the Weber‐Morris intraparticle diffusion model is not suitable for describing the adsorption process of NH 2 ‐ZIF‐8 towards Au (III)/Ag(I), which is consistent with the result of Pore diameter distribution. Compared with the pure ZIF‐8, The equilibrium time for Au (III) reduces from 42 hr to 1.5 hr, and from 4 hr to 2 hr for Ag(I) . This reduction can be explained by the increase in the number of active sites upon the introduction of amine groups, which improves the adsorption kinetics for the Au (III) and Ag(I) ions.…”

Section: Resultsmentioning

confidence: 99%

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Fast recovery of Au (III) and Ag(I) via amine‐modified zeolitic imidazolate framework‐8

Zhou

et al. 2020

Applied Organom Chemis

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In this paper, zeolitic imidazolate framework‐8 modified by the ethanediamine (NH2‐ZIF‐8) was employed for adsorbing Au (III) and Ag(I) from aqueous solutions. The adsorption capacities of NH2‐ZIF‐8 towards Au (III) and Ag(I) were found to be significantly affected by the pH values of the solution. The adsorption kinetics studies show that NH2‐ZIF‐8 presents a fast adsorption property towards metals, attaining 93% of adsorption equilibrium uptake for Au (III) within the first 30 min. This phenomenon can be ascribed to the coordination interaction between the amino group and Au (III). The thermodynamic data suggest that the adsorption of NH2‐ZIF‐8 towards Au (III) is endothermic process, while that for Ag(I) is exothermic. The maximum adsorption capacities of NH2‐ZIF‐8 toward Au (III) and Ag(I) can be achieved to 357 mg·g−1 and 222.25 mg·g−1, respectively. The metal ions interference results show that Cu (II) and Ni (II) hardly have no interference on Au (III) adsorption in e‐waste containing 1500 mg·l−1 Cu (II),100 mg·l−1 Ni (II) and 10 mg·l−1 Au (III); while for Ag(I), Cd (II) and Zn (II) have little interference on Ag(I) adsorption in the hybrid solutions containing Ag(I), Ni (II), Cd (II) and Zn (II) with equal concentration (50 mg·l−1), but Ni (II) interference most. The XPS study shows that partial Au (III) was reduced to Au(I), and that Ag(I) was completely reduced to Ag(0) during the adsorption process. The abundant of active sites of NH2‐ZIF‐8 containing C=N, N‐H, and Zn‐OH groups play a key role in the adsorption of Au (III) and Ag(I). In addition, electrostatic interaction can be responsible for the adsorption of Au (III) by NH2‐ZIF‐8. The regeneration experiments results show that the adsorption capacities of NH2‐ZIF‐8 towards Au (III) and Ag(I) can maintain after three cycles. This work provides a reliable method to improve the adsorption kinetics for metal ions.

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Section: Resultsmentioning

confidence: 99%

“…In our previous work, ZIF‐8 was explored to recover Au (III) and Ag(I) from water. It exhibits good adsorption capacity and great reutilization, while showing slow adsorption rate . The adsorption mechanism of ZIF‐8 towards Au (III) and Ag(I) includes electrostatic attraction and redox.…”

Section: Introductionmentioning

confidence: 99%

Fast recovery of Au (III) and Ag(I) via amine‐modified zeolitic imidazolate framework‐8

Zhou

et al. 2020

Applied Organom Chemis

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“…The β s value in the Sips model was much bigger than 1. Based on the above analysis, the adsorption of Au(III) onto 2,5-TP complies with a heterogeneous adsorption process. − …”

Section: Resultsmentioning

confidence: 99%

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

et al. 2019

Ind. Eng. Chem. Res.

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Recovery of precious metal ions from wastewater can bring huge economic benefits and alleviate current supply shortage in industries. Here, a novel metal–organic framework (2,5-TP) constructed with sulfur-containing ligands and Zn(II) was synthesized as a highly efficient adsorbent to adsorb Au(III) from water for the first time. Compared with that of the reported adsorbents, 2,5-TP exhibits excellent Au(III) adsorption performance with the maximum adsorption capacity of 1253.5 mg·g–1 and an adsorption ratio of 97%. Significantly, 2,5-TP has excellent selectivity toward Au(III) and remarkable recycle performance. The adsorption kinetics for Au(III) adsorption can be described well by the pseudo-second-order kinetics and the adsorption isotherm data accord well with the Sips model, indicating that the adsorption of Au(III) onto 2,5-TP is a heterogeneous chemisorption process. The formation of Au–S and Zn–O–Au bonds suggests an important role in Au(III) adsorption. With the facile synthesis, high adsorption capacity, excellent selectivity, and outstanding reusability, the 2,5-TP adsorbent could be a promising candidate to adsorb Au(III) from water.

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“…Besides the above-mentioned heavy metals, the removal of other heavy metals (e.g., Ag + , Hg 2+ , Cd 2+ , Ni 2+ , Au 3+ , and As 5+ /As 3+ ) on ZIF-s has also been investigated in recent years. 214,229,[255][256][257][258][259][260][261][262][263][264] For instance, arsenic, including toxic As(V) and more toxic As(III), has been widely found in fossil fuels, smelting, mining and pesticides. Thus, it is mandatory to remove arsenic below the maximum amount (e.g., 10 g L −1 in drinking water according to the WHO).…”

Section: Removal Of Heavy Metalsmentioning

confidence: 99%

“…, Ag + , Hg 2+ , Cd 2+ , Ni 2+ , Au 3+ , and As 5+ /As 3+ ) on ZIF-s has also been investigated in recent years. 214,229,255–264 For instance, arsenic, including toxic As( v ) and more toxic As( iii ), has been widely found in fossil fuels, smelting, mining and pesticides. Thus, it is mandatory to remove arsenic below the maximum amount ( e.g.…”

Section: Environmental Applicationmentioning

confidence: 99%

Recent advances in the application of zeolitic imidazolate frameworks (ZIFs) in environmental remediation: a review

Zhang

Yue

Xiao

et al. 2022

Environ. Sci.: Nano

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Selective recovery of Ag(I) from industrial wastewater using zeolite imidazolate framework-8: performance and mechanisms

Cited by 12 publications

References 44 publications

Fast recovery of Au (III) and Ag(I) via amine‐modified zeolitic imidazolate framework‐8

Fast recovery of Au (III) and Ag(I) via amine‐modified zeolitic imidazolate framework‐8

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

Recent advances in the application of zeolitic imidazolate frameworks (ZIFs) in environmental remediation: a review

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