Adsorption and Removal of Mercury(II) by a Crosslinked Hyperbranched Polymer Modified via Sulfhydryl

Wang, Qian; Zhu, Sining; Chen, Xi; Jiang, Binhai; Fan, Zhengxiu

doi:10.1021/acsomega.2c00622

Cited by 17 publications

(8 citation statements)

References 59 publications

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“…Through the influence of temperature on thermodynamic parameters, the spontaneity and mechanism of the adsorption process can be further studied. The adsorption thermodynamics of Cd(II) by Cd(II)-IIP was studied at 298, 308, and 318 K. The thermodynamic parameters include entropy (Δ S ° (J/(mol·k)), enthalpy (Δ H ° (kJ/mol)), and Gibb’s free energy (Δ G ° (kJ/mol)) and are obtained by fitting the curve according to the van’t Hoff thermodynamic equation . The thermodynamic parameters are calculated according to eqs , , and . , K ° = q e C e ln ⁡ K ° = − Δ H ° R T + Δ S ° R Δ G ° = Δ H ° − T Δ S ° where C e (mg/L) and q e (mg·g –1 ) are the equilibrium concentration and the equilibrium adsorption capacity of Cd(II) in the solution, respectively, R (8.314 J·mol –1 ·K –1 ) is the gas constant, and T (K) is the absolute temperature in kelvin.…”

Section: Resultsmentioning

confidence: 99%

“…The adsorption thermodynamics of Cd(II) by Cd(II)-IIP was studied at 298, 308, and 318 K. The thermodynamic parameters include entropy (ΔS°( J/(mol•k)), enthalpy (ΔH°(kJ/mol)), and Gibb's free energy (ΔG°(kJ/mol)) and are obtained by fitting the curve according to the van't Hoff thermodynamic equation. 47 The thermodynamic parameters are calculated according to eqs 8, 9, and 10. 47,48…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The adsorption thermodynamics of Cd(II) by Cd(II)-IIP was studied at 298, 308, and 318 K. The thermodynamic parameters include entropy (Δ S ° (J/(mol·k)), enthalpy (Δ H ° (kJ/mol)), and Gibb’s free energy (Δ G ° (kJ/mol)) and are obtained by fitting the curve according to the van’t Hoff thermodynamic equation . The thermodynamic parameters are calculated according to eqs , , and . , where C e (mg/L) and q e (mg·g –1 ) are the equilibrium concentration and the equilibrium adsorption capacity of Cd(II) in the solution, respectively, R (8.314 J·mol –1 ·K –1 ) is the gas constant, and T (K) is the absolute temperature in kelvin. The above expressions (eqs –) are used to compute the required thermodynamic parameters.…”

Section: Resultsmentioning

confidence: 99%

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Preparation and Characterization of Cadmium(II)-Ion-Imprinted Composites Based on Epoxy Resin

Zhu

Chen

Zhang

et al. 2022

ACS Appl. Polym. Mater.

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In recent years, ion-imprinting technology has been frequently employed to selectively eliminate heavy metals from aqueous solutions. In this study, an environment-friendly porous cadmium-ion-imprinted composite (Cd(II)-IIP) based on epoxy resin was prepared using Cd(II) ion as a template, polyethylene glycol as a porogen, epoxy resin as the carrier, and polyethylene polyamine as complexation agent and curing agent via surface imprinting technique and stepwise polymerization process. Cd(II)-IIP was further characterized using SEM-EDS, FT-IR, TGA, and XPS, the systematic adsorption investigation of Cd(II)-IIP for the Cd(II) ions was explored. The research found that the adsorption capacity of Cd(II) got to the maximum value (q m = 64.74 mg/g) at pH = 4.0 and T = 318 K and the Cd(II)-IIP had high selectivity for Cd(II) in the presence of polymetallic ions and still has good recoverability after five cycles. The results showed that the adsorption process was closer to the pseudo-second-order kinetic model, and the isothermal curves of the experimental data were more consistent with the Langmuir adsorption model, which indicated that the whole process of adsorption was mainly monolayer chemisorption and spontaneous endothermic. In addition, the XPS and FT-IR results indicate that the interaction between Cd(II) and functional groups is related to O or N atoms on Cd(II)-IIP. In summary, Cd(II)-IIP has certain advantages and considerable development prospects for the treatment of wastewater containing Cd(II).

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Preparation and Characterization of Cadmium(II)-Ion-Imprinted Composites Based on Epoxy Resin

Zhu

Chen

Zhang

et al. 2022

ACS Appl. Polym. Mater.

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“…To assess the position of the investigated PAB adsorbent among other reported HCPs in removing toxic metal ions from wastewater, a list of articles was screened [20,28,[47][48][49][50], and the adsorbents' performance is summarized in Table 5. For appropriate comparison, the listed adsorbents were all HCPs and, wherever applicable, presented with their surface area, pore type, adsorption condition, and adsorption mechanism.…”

Section: Relative Performance Of Pabmentioning

confidence: 99%

Synthesis of Poly(aniline-co-benzene)-Based Hypercrosslinked Polymer for Hg(II) Ions Removal from Polluted Water: Kinetic and Thermodynamic Studies

Aljboar,

Alghamdi,

Al-Odayni

et al. 2023

Water

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The aim of this work was to investigate the adsorption performance of a highly crosslinked poly(aniline-co-benzene) (PAB) copolymeric network. This hypercrosslinked polymer (HCP) was obtained via the Friedel–Craft reaction in the presence of FeCl3 as an alkylation catalyst. The HCP was characterized using FTIR, SEM, TGA-DTA-DSC thermograms, and BET surface area. The analysis revealed a major mesoporous (an average pore diameter of 4.96 nm) structure, a surface area of 987 m2/g, and adequate chemical and thermal stability, thus supporting its potential as an adsorbent. The PAB HCP capability as an adsorbent for removing mercury ions (Hg2+) from wastewater was examined, and the data obtained were kinetically and thermodynamically modeled. The data were found to fit PFO well (R2 = 0.999), suggesting a physisorption process and a rate-limiting step involving the diffusion process, as proven with IPD and LFD models. The adsorption of Hg2+ on PAB was spontaneous (ΔG° is negative; −4.41 kJ/mol at 298 K), endothermic (ΔH° is positive; 32.39 kJ/mol), and random (ΔS° is positive; 123.48 J/mol·K) at the adsorption interface. The thermodynamic analysis also suggested a physical adsorption mechanism (ΔG° between −20 and 0 kJ/mol). These findings promote the potential application of PAB HCP as an efficient adsorbent for removing Hg2+ ions and other heavy metal ions from polluted environments.

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“…A large number of studies have proven that compounds containing N, O, and S atoms can form coordination compounds with heavy metal ions [20]. Mercury (II) shows a strong affinity with ligands containing sulphur atoms, such as sulfhydryl compounds [21], sulphur-containing heterocyclic rings [22], and thiourea derivatives [23], and its interaction relationship has been further verified by density functional theory calculations [24]. Many compounds containing sulphur atoms have been successfully used as active carriers for Mercury ionselective electrodes [25].…”

Section: Introductionmentioning

confidence: 99%

Rapid Determination of Mercury Ions in Environmental Water Based on an N-Rich Covalent Organic Framework Potential Sensor

Tian

Zhu

2022

International Journal of Chemical Engineering

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In this article, an N-rich covalent organic framework (COFTFPB-TZT) was successfully synthesized using 4,4′,4′-(1,3,5-triazine-2,4,6-triyl) trianiline (TZT), and 4-[3,5-bis (4-formyl-phenyl) phenyl] benzaldehyde (TFPB). The as-prepared COFTFPB-TZT possesses irregular cotton wool patches with a large specific surface area. A novel selective electrode based on COFTFPB-TZT was used for the determination of Mercury ions. The abundance of N atoms in COFTFPB-TZT provides more coordination sites for Hg2+ adsorption, resulting in a change in the surface membrane potential of the electrode to selectively recognize Hg2+. Under optimal experimental conditions, the ion-selective electrode shows a good potential response to Hg2+, with a linear range of 1.0 × 10−9∼1.0 × 10−4, a Nernst response slope of 30.32 ± 0.2 mV/-PC at 25°C and a detection limit of 4.5 pM. At the same time, the mercury-ion electrode shows a fast response time of 10 s and good reproducibility and stability. The selectivity coefficients for Fe2+, Zn2+, As3+, Cr6+, Cu2+, Cr3+, Al3+, Pb2+, NH4+, Ag+, Ba2+, Mg2+, Na+, and K+ are found to be small, indicating no interference in the detection system. The proposed method can be successfully applied to the determination of Hg2+ in 3 typical environmental water samples, with a recovery rate of 98.6–101.8%. In comparison with the spectrophotometric method utilizing dithizone, the proposed method is simple and fast and holds great potential application prospects in environmental water quality monitoring and other fields.

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Adsorption and Removal of Mercury(II) by a Crosslinked Hyperbranched Polymer Modified via Sulfhydryl

Cited by 17 publications

References 59 publications

Preparation and Characterization of Cadmium(II)-Ion-Imprinted Composites Based on Epoxy Resin

Preparation and Characterization of Cadmium(II)-Ion-Imprinted Composites Based on Epoxy Resin

Synthesis of Poly(aniline-co-benzene)-Based Hypercrosslinked Polymer for Hg(II) Ions Removal from Polluted Water: Kinetic and Thermodynamic Studies

Rapid Determination of Mercury Ions in Environmental Water Based on an N-Rich Covalent Organic Framework Potential Sensor

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