Thiosemicarbazone modified zeolitic imidazolate framework (TSC-ZIF) for mercury(<scp>ii</scp>) removal from water

Jaafar, Amani; Platas‐Iglesias, Carlos; Bilbeisi, Rana A.

doi:10.1039/d1ra02025k

Cited by 8 publications

(12 citation statements)

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“…The experimental data fit strong the Langmuir equilibrium adsorption isotherm for Ag(I) and Pb(II) with a correlation coefficient of R 2 > 0.99 (Figure S4; Table 2), whereas the fitted Freundlich model obtained a relatively lower correlation coefficient (R 2 < 0.93; Table S2), implying that the adsorption process, follows a spontaneous single‐layer chemical adsorption 44,45 . This adsorption behavior was in line with the previously reported adsorption of Hg(II) 24 . The maximum adsorption capacities in homo‐ionic system of Ag(I) are q m = 285 mg/g, and Pb(II) is q m = 769 mg/g; adsorption parameters of both metals are shown in Table 2.…”

Section: Resultssupporting

confidence: 87%

“…24 The removal efficiency of mercury(II) from water increased, in the TSC-ZIF 1 relative to ZIF-8, to 97% in 2 h, with an adsorption capacity of 1,667 mg/g. 24 TSC-ZIF 1 can be regenerated to be used in more than five successful cycles of mercury(II) removal, without compromising its efficiency. A graphical representation of TSC-ZIF 1 structure is presented in Figure 1.…”

Section: Introductionmentioning

confidence: 95%

“…Previously reported model of the TSC‐ZIF 1 (MIM 3.5 :Thio 1 :Zn) structure with the TSC functionality highlighted in the space filled format 24 …”

Section: Introductionmentioning

confidence: 99%

“…Previously reported model of the TSC-ZIF 1 (MIM 3.5 :Thio 1 :Zn) structure with the TSC functionality highlighted in the space filled format. 24 Pb(II) ions from water in homo-ionic and tertiary systems. The use of TSC-ZIF 1 as an adsorbent is an effective approach for the removal of Ag(I) and Pb(II) from water.…”

Section: Introductionmentioning

confidence: 99%

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Tailored Zeolitic Imidazolate Framework (TSC‐ZIF) for water purification: Evaluating TSC‐ZIF affinity towards heavy metal ions in multi‐metal solutions

Jaafar,

Youness,

Bilbeisi

2023

Applied Organom Chemis

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In response to the growing concerns surrounding water pollution and the presence of multiple metal ions in environmental matrices, we conducted a comprehensive study to explore the potential of a thiosemicarbazone Schiff base in the Zeolitic Imidazolate Framework (TSC‐ZIF‐1) as an efficient adsorbent for removing harmful metal ions from aqueous solutions. Our investigation assessed the adsorption capacity and efficiency of TSC‐ZIF 1 towards three key metal ions—Hg(II), Ag(I), and Pb(II)—in homo‐ionic, tertiary, and multi‐metal ion systems. TSC‐ZIF 1 exhibited unprecedented adsorption behavior towards all three metal ions in the homo‐ionic system, with the Langmuir isotherm models fitting well (R2 ~ 0.98 to 0.99). The maximum adsorption capacities were found to be 1,667 mg/g for Hg(II), as previously reported; 285 mg/g for Ag(I); and 769 mg/g for Pb(II); these values serve as baseline values. Subsequently, we conducted a comparative analysis for a tertiary system, Hg(II)/Ag(I)/Pb(II), where the three metals co‐existed in one solution. The adsorption capacity for each metal ion was reduced to varying extents; notably, the adsorption capacity for Pb(II) experienced the most significant reduction, reaching a qm value of 57 mg/g, representing an ~93% decrease compared to the homo‐ionic metal system. Conversely, the adsorption capacity for Ag(I) exhibited a minor decrease of ~3%. Despite a decrease in the adsorption capacity for Hg(II) by approximately 34%, the removal capacity remains the highest among the other metals. Our investigation of the competitive adsorption among the metal ions in the Hg(II)/Ag(I)/Pb(II) system revealed an antagonistic effect, indicating strong adsorption competition for available sites on TSC‐ZIF 1. When extending this study to a more complex multi‐metal ion system containing six metal ions, TSC‐ZIF 1 exhibited high selectivity (higher than 60% removal) towards Hg(II), Ag(I), and Pb(II) in a multi‐ionic system, including Hg(II), Ag(I), Pb(II), Cd(II), Ni(II), and Mg(II).

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Section: Resultssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 95%

“…Previously reported model of the TSC‐ZIF 1 (MIM 3.5 :Thio 1 :Zn) structure with the TSC functionality highlighted in the space filled format 24 …”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tailored Zeolitic Imidazolate Framework (TSC‐ZIF) for water purification: Evaluating TSC‐ZIF affinity towards heavy metal ions in multi‐metal solutions

Jaafar,

Youness,

Bilbeisi

2023

Applied Organom Chemis

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“…This, together with the control of protonation/deprotonation and the nature of auxiliary anions, lead to the formation of different structures such as monomers [10][11][12], dimers [13][14][15] or coordination polymers [16][17][18]. In addition to their fascinating structural properties, TSCs have a wide range of applications in different fields as catalysis [19][20][21], metal detoxification [22][23][24], metal sensing [25][26][27] or medicine [28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Reaction Conditions in the Crystal Structures of Zn(II) and Ni(II) Coordination Compounds with a Dissymmetric Bis(Thiosemicarbazone) Ligand

et al. 2022

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The new ligand HMeATSM, derived from condensation of 2-3-butanedione with 4-methyl-3-thiosemicarbazide and 2,4-dimethyl-3-thiosemicarbazide, has been synthesized. Its reactivity with nickel(II) and zinc(II) nitrates was explored and the resulting complexes were thoroughly characterized by elemental analysis, conductivity, mass spectrometry, IR, 1H and 13C NMR spectroscopies and their structures were confirmed by single-crystal X-ray diffraction. The results showed that the complex [Ni(MeATSM)]NO3 1 is formed under every reaction condition. In contrast, the reaction with zinc(II) nitrate depends on the temperature and the presence of LiOH.H2O, leading to the obtaining of complexes [Zn(MeATSM)(OH2)](NO3) 2 and [Zn(Me2TS)2(OH2)](NO3)2 3. The crystal structures of complexes 1 and 2 show that the dissymmetric ligand acts as a N2S2 tetradentate monoanionic ligand. The structural preferences of the metals also determine the structure of the complexes: whereas nickel(II) is in a square-planar environment, the zinc atom prefers a distorted square-base pyramid geometry imposed by the coordination mode and the planarity of the bis(thiosemicarbazone) ligand. In contrast, in complex 3, containing two bidentate Me2TS ligands, the Zn(II) is in a trigonal bipyramid arrangement. In all the complexes, the nitrate ion is not coordinated to the metal and acts as a counterion.

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Ultra-Efficient Removal of Mercury from Contaminated Water using Selected Phenylimidazole Derivatives

Živković

2024

Water Air Soil Pollut

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Heterocycles, including imidazole derivatives, are important chemicals due to their structural similarity to active natural molecules. This study explored the utilization of phenylimidazole derivatives for mercury removal from aqueous solutions. Three derivatives were tested, including one harboring a sulfhydryl functional group, thus offering distinct mercury-binding capabilities. Mercury binding experiments revealed modest mercury binding by two derivatives. However, extraordinary efficiency of mercury binding by the sulfhydryl-bearing compound was demonstrated through a reduction in mercury concentrations in pure water by 43-fold in just 15 min and decreasing below the analytical detection limit with prolonged exposure (30 min). Moreover, the ultra-efficiency of mercury binding was demonstrated by a capability to reduce mercury concentrations even in highly contaminated environmental water sample by a factor exceeding 1200-fold in 20 h, using minimal amounts of the compound. This phenylimidazole derivative exhibited comparable efficiency in binding mercury from authentic environmental water samples, hinting at practical applications for real-world remediation efforts. Kinetic investigations showed a pseudo-first order reaction with a rate constant of 0.26 min−1 and half-life of 2.69 min that governs mercury binding to this phenylimidazole derivative. These findings underscore the potential of the sulfhydryl-containing phenylimidazole derivative, as swift and effective binding material for aqueous mercury removal. Its rapid action, coupled with binding efficiency, suggests a promising material for addressing mercury contamination in highly contaminated environmental water samples.

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Thiosemicarbazone modified zeolitic imidazolate framework (TSC-ZIF) for mercury(ii) removal from water

Abstract: Zeolitic imidazolate frameworks Ald-ZIF were obtained by mixing two imidazole-based linkers with zinc(ii). Post-synthetically modified Ald-ZIFs with thiosemicarbazide group improved mercury(ii) removal efficiency from water at a capacity of 1667 mg g−1.

Cited by 8 publications

References 83 publications

Tailored Zeolitic Imidazolate Framework (TSC‐ZIF) for water purification: Evaluating TSC‐ZIF affinity towards heavy metal ions in multi‐metal solutions

Tailored Zeolitic Imidazolate Framework (TSC‐ZIF) for water purification: Evaluating TSC‐ZIF affinity towards heavy metal ions in multi‐metal solutions

Influence of the Reaction Conditions in the Crystal Structures of Zn(II) and Ni(II) Coordination Compounds with a Dissymmetric Bis(Thiosemicarbazone) Ligand

Ultra-Efficient Removal of Mercury from Contaminated Water using Selected Phenylimidazole Derivatives

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