Facile synthesis of zinc-based organic framework for aqueous Hg (II) removal: Adsorption performance and mechanism

Zeng, Biao; Wang, Wei; He, Siming; Lin, Guiping; Du, Weidong; Chang, Jun; Ding, Zhao

doi:10.1016/j.nanoms.2021.06.005

Cited by 46 publications

(5 citation statements)

References 51 publications

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“…[ 17,33,37 ] The peak at 586 cm −1 was considered to be as a consequence of the vibration absorption of the C–S from C–SH groups. [ 38–41 ] These results demonstrated that the self‐assembly of the polymers successfully introduced and moulded a large number of functional groups.…”

Section: Resultsmentioning

confidence: 93%

“…[17] The S2p was deconvolved into two bands with binding energies of 163.61 and 164.71 eV, and combined with the FTIR peak of 586 cm −1 , the presence of S2p 1/2 and S2p 3/2 was attributed to the formation of the -SH groups. [40,42] According to the high precision spectrum of N1s, N elements existed on the surface of the materials in the forms of C-N (399.93 eV) and N-H (401.89 eV) bonds. [43] The high resolution spectrum of C1s was considered to be divided into three main peaks that corresponded to C-C at 284.80 eV, the overlapping of C-O/C-N/C-S at 286.21 eV and C=O at 289.04 eV.…”

Section: Characterization Of the Th@wo X /Spmentioning

confidence: 99%

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Preparation of Self‐Assembled Starch‐Based Organometallic Polymers and Their Efficient Adsorption of Mercury Ion in Water

et al. 2023

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Herein, a newly‐developed material called Thiourea@WOx/Starch Polymer (TH@WOx/SP) is prepared by a one‐pot and high yield solvothermal method. It is not only equipped with porous structure but also has a superior adsorption capacity. The relevant characterizations and adsorption performance are analyzed by scanning electron microscopy (SEM), thermogravimetric analysis (TGA), X‐ray diffraction (XRD), X‐ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), Zeta potential analysis, and differential pulse voltammetry (DPV). Surprisingly, with its abundant active sites, the TH@WOx/SP reveals its excellent adsorption capacity for heavy metal and organics dye, as high as 2201.16 mg g−1 for Hg(II) and 175.01 mg g−1 for methylene blue (MB), finished within 30 and 90 min, respectively. These satisfactorily fast and high adsorption capacities not only come down to its concave–convex structure, but also to its enriched functional groups serving as anchor sites for Hg(II) and MB. The adsorption mechanism of Hg(II) and MB on TH@WOx/SP is carefully evaluated, which can be attributed to covalent coordination, ion exchange, π–π interactions, hydrogen bonds, and electrostatic attraction. This work designs a new strategy to develop a novel porous metal organic polymer adsorbents and demonstrates its prospective application in the field of adsorption.

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Section: Resultsmentioning

confidence: 93%

Section: Characterization Of the Th@wo X /Spmentioning

confidence: 99%

Preparation of Self‐Assembled Starch‐Based Organometallic Polymers and Their Efficient Adsorption of Mercury Ion in Water

et al. 2023

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“…The results were compared with theoretical zero, first and second‐order models. According to our interpretation, the primary mechanism of oxidation processes Equation ().

OH + Dye \to oxidized products .

The rate of disappearance of the color follows the zero, first and second – order kinetics Equations () 24–26

C_{t} = C_{0} - K_{0} t,

C_{t} = C_{0} e^{- k_{1} t},

\frac{1}{C_{t}} = \frac{1}{K_{0}} + K_{2} t,

where, C 0 , initial concentration of dye (g/l), C t , the concentration of dye at time t (g/l), t , reaction time (min), k 1 , rate constant for pseudo‐first order (min −1 ).…”

Section: Resultsmentioning

confidence: 99%

“…The rate of disappearance of the color follows the zero, first and secondorder kinetics Equations ( 3)-(5). [24][25][26]…”

Section: Kinetic Studiesmentioning

confidence: 99%

Experimental study of photo electro‐Fenton method for the removal of Reactive Yellow 186: Influence of operational parameters

Elumalai

Sowmya

Shanmugam

2022

Env Prog and Sustain Energy

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Water contamination is a global issue which must be addressed and examined in all water resource policies. In recent decades, Pollution from azo dyes has become a significant cause of concern in the environment. Oxidation procedures are preferred to break down organic molecules found in wastewater. Electrochemical advanced oxidation processes are among the most successful methodologies for pollutant degradation and inspired by the efficiency of the photo electro‐Fenton (PEF). It has been conducted for removals of organic pollutants using anode (Ti), Stainless Steel cathode. Reactive Yellow 186 (RY 186) azo dye in sulphate medium was subjected to this study pH (2–9), dye concentration (0.05–0.25 g/l), Iron dosage (0.01–0.03 g/l), H2O2 (0.1–0.5 g/l) dosage, and current density (0.1–0.5 mA/cm2) of PEF were evaluated. The optimum pH, RY 186 concentration, Iron dosage, H2O2 dosage, and current density were found to be approximately 3, 0.15 g/l, 0.015 g/l, 0.2 g/l, and 0.1 mA/cm2, respectively. It was concluded that acidic pH was required to increase the degradation efficiency of the PEF at optimum conditions and a reaction time of 15 min. The PEF approach was the most effective method for the reasons, hydroxyl radical oxidation and UVA radiation, degradation of up to 99%, and COD removal was 94.82% with optimized parameters. Degradation and COD analysis tracked with high‐performance liquid chromatography and infrared spectroscopy analysis. The results were compared with theoretical zero, first and second‐order models. it was found that the process obeys pseudo‐first‐order kinetic and the studies found to fit the data well (R2 = 0.9824). The cyclic voltammetry technique was employed to investigate the PEF process.

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“…Above pH 5.0, the adsorption capacities decreased with the increasing of pH. This could attributed to the formation of hydroxyl species of mercury such as soluble Hg(OH) + (Zeng et al, 2021).…”

Section: Determination Of the Optimum Ph Valuementioning

confidence: 98%

Facile Synthesis of Cross-linked Hyperbranched Polyamidoamines Dendrimers for Efficient Hg(Ⅱ) Removal From Water

Geng

Kong

et al. 2021

Front. Chem.

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Dendrimers as commonly used metal ions adsorption materials have the advantages of good adsorption performance and high reuse rate, but the high cost limits its extensive use. Compared with dendrimers, hyperbranched dendrimers have similar physical and chemical properties and are more economical. Therefore, hyperbranched dendrimers are more suitable for industrial large-scale adsorption. The hyperbranched polyamidoamine (HPAMAM) gels were prepared by cross-linking hyperbranched polyamidoamine (HPAMAM-ECH-x and HPAMAM-EGDE-x) with different amounts of epichlorohydrin (ECH) and ethylene glycol diglycidyl ether (EGDE), respectively. The as-synthesized adsorbents were characterized by FT-IR, SEM and XPS. The prepared adsorbents were used to adsorb Hg(Ⅱ) in aqueous solution, and the effects of solution pH, contact time, temperature and initial concentration of metal ion on the adsorption capacity were investigated. The effect of solution pH indicated that the optimum condition to Hg(Ⅱ) removing was at pH 5.0. The adsorption kinetic curves of the two kinds of materials were in accordance with the pseudo-second-order model. For the HPAMAM-ECH samples, the adsorption thermodynamic curves fitted the Langmuir model, while for the HPAMAM-EGDE samples, both Langmuir and Freundlich equations fitted well. The maximum adsorption capacity of HPAMAM-ECH-3 obtained from Langmuir model toward Hg(Ⅱ) was 3.36 mmol/g at pH 5.0 and 35°C.

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Facile synthesis of zinc-based organic framework for aqueous Hg (II) removal: Adsorption performance and mechanism

Cited by 46 publications

References 51 publications

Preparation of Self‐Assembled Starch‐Based Organometallic Polymers and Their Efficient Adsorption of Mercury Ion in Water

Preparation of Self‐Assembled Starch‐Based Organometallic Polymers and Their Efficient Adsorption of Mercury Ion in Water

Experimental study of photo electro‐Fenton method for the removal of Reactive Yellow 186: Influence of operational parameters

Facile Synthesis of Cross-linked Hyperbranched Polyamidoamines Dendrimers for Efficient Hg(Ⅱ) Removal From Water

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