l-Cysteine and silver nitrate based metal sulfide and Zeolite-Y nano adsorbent for efficient removal of mercury (II) ion from wastewater

Jena, Kishore K.; Reddy, K. Suresh Kumar; Karanikolos, Georgios N.; Choi, Daniel S.

doi:10.1016/j.apsusc.2022.155777

Cited by 17 publications

(5 citation statements)

References 93 publications

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“… 177 Recent studies showed that a zeolite-Ag 2 S nanohybrid material exhibited an extraordinary adsorption capacity of 390 mg g −1 towards Hg( ii ) ions in wastewater with higher removal rates than pure zeolite. 178 It was found that the zeolite component of the nanohybrid material provided a porous structure with high surface area, while the Ag 2 S NPs enhanced its adsorption capacity, as shown in Fig. 8 .…”

Section: Inorganic-based Adsorbentsmentioning

confidence: 92%

Comprehensive assessment of carbon-, biomaterial- and inorganic-based adsorbents for the removal of the most hazardous heavy metal ions from wastewater

Sheraz,

Shah,

Haleem

et al. 2024

RSC Adv.

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Section: Inorganic-based Adsorbentsmentioning

confidence: 92%

Comprehensive assessment of carbon-, biomaterial- and inorganic-based adsorbents for the removal of the most hazardous heavy metal ions from wastewater

Sheraz,

Shah,

Haleem

et al. 2024

RSC Adv.

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“…On the other hand, for HZ-V, the signal representing oxygen was split into three components (FWHM = 1.8 eV was used): 530.1 eV (O-V); 531.9 eV (O-V/O-Al); 534.3 eV (O-Si) [37,40]. The shifting of binding energy in zeolites depends on charge transfers in the zeolite lattice and the ionicity and covalency of Si-O and Al-O [41,42]. The percentage of elements in the surface layer of the HZ-Ta and HZ-V are shown in the Table 3.…”

Section: Catalyst Characterizationmentioning

confidence: 99%

Hierarchical Zeolites Containing Vanadium or Tantalum and Their Application in Cyclohexene Epoxidation Reaction

Szczyglewska,

Feliczak-Guzik,

Chałupniczak

et al. 2023

Materials

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The aim of this study was the synthesis, characterization, and catalytic application of new hierarchical materials modified with tantalum and vanadium ions. These materials exhibit secondary porosity, thus allowing the reactant molecules to access the active sites of the material while maintaining the acidity and crystallinity of the zeolites. Based on the results, these systems were found to be highly active and selective in the oxidation of cyclohexene. The performance of the catalysts was compared in oxidation processes carried out by conventional and microwave-assisted methods. Microwave-assisted experiments showed that in the presence of a hierarchical FAU zeolite containing Ta, long reaction times could be shortened with increased activity and selectivity under the same residual experimental conditions.

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“…The interaction between the equilibrium concentration and adsorbate was investigated using the two adsorption isotherms. On the other hand, the coefficient of separation (RL) was used in determining the adsorption process as favorable, unfavorable, linear, or irreversible [36].…”

Section: Adsorption Isothermsmentioning

confidence: 99%

“…The absence of Hg(II) molecules in the solution, as well as the presence of an increasing number of active sites free Hg(II) molecule interaction, could explain this. In general, as the adsorbent dosage increases, the % removal also has to be increased due to the an increase in the MIP/NC dosage to ultimately increase the binding spots obtainable for Hg(II) adsorption on the surface as well as the accessibility of exchangeable spots of the Hg(II) ions [36]. However, in our case, the decrease of adsorption efficiency from 49.2 to 24.6 mg/g with an increase of adsorbent dosage from 0.1 to 0.5 g of MIP/NC may have aggregated the composite particles, resulting in a low adsorption capacity.…”

Section: Effect Of Absorbent Dosagementioning

confidence: 99%

Molecularly Imprinted Polymer-Based Nanoporous Carbon Nanocomposite for Effective Adsorption of Hg(II) Ions from Aqueous Suspensions

Abubakar,

Yusof,

Abdullah

et al. 2023

Separations

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Due to the release of hazardous heavy metals from various industries, water pollution has become one of the biggest challenges for environmental scientists today. Mercury Hg(II) is regarded as one of the most toxic heavy metals due to its ability to cause cancer and other health issues. In this study, a tailor-made modern eco-friendly molecularly imprinted polymer (MIP)/nanoporous carbon (NC) nanocomposite was synthesized and examined for the uptake of Hg(II) using an aqueous solution. The fabrication of the MIP/NC nanocomposite occurred via bulk polymerization involving the complexation of the template, followed by polymerization and, finally, template removal. Thus, the formed nanocomposite underwent characterizations that included morphological, thermal degradation, functional, and surface area analyses. The MIP/NC nanocomposite, with a high specific surface area of 884.9 m2/g, was evaluated for its efficacy towards the adsorptive elimination of Hg(II) against the pH solution changes, the dosage of adsorbent, initial concentration, and interaction time. The analysis showed that a maximum Hg(II) adsorption effectiveness of 116 mg/g was attained at pH 4, while the Freundlich model fitted the equilibrium sorption result and was aligned with pseudo-second-order kinetics. Likewise, thermodynamic parameters like enthalpy, entropy, and Gibbs free energy indicated that the adsorption was consistent with spontaneous, favorable, and endothermic reactions. Furthermore, the adsorption efficiency of MIP/NC was also evaluated against a real sample of condensate from the oil and gas industry, showing an 87.4% recovery of Hg(II). Finally, the synthesized MIP/NC showed promise as a selective adsorbent of Hg(II) in polluted environments, suggesting that a variety of combined absorbents of different precursors is recommended to evaluate heavy metal and pharmaceutical removals.

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l-Cysteine and silver nitrate based metal sulfide and Zeolite-Y nano adsorbent for efficient removal of mercury (II) ion from wastewater

Cited by 17 publications

References 93 publications

Comprehensive assessment of carbon-, biomaterial- and inorganic-based adsorbents for the removal of the most hazardous heavy metal ions from wastewater

Comprehensive assessment of carbon-, biomaterial- and inorganic-based adsorbents for the removal of the most hazardous heavy metal ions from wastewater

Hierarchical Zeolites Containing Vanadium or Tantalum and Their Application in Cyclohexene Epoxidation Reaction

Molecularly Imprinted Polymer-Based Nanoporous Carbon Nanocomposite for Effective Adsorption of Hg(II) Ions from Aqueous Suspensions

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