Facile Fabrication of N-Doped Magnetic Porous Carbon for Highly Efficient Mercury Removal

Huang, Lijin; He, Man; Chen, Beibei; Hu, Bin

doi:10.1021/acssuschemeng.8b01498

Cited by 24 publications

(9 citation statements)

References 56 publications

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“…Some new binding energy bands can be found in the wide-scan XPS spectra of POFct-1 after adsorbing Hg(II) and Cu(II) ions (Figure c). As shown in Figure d, a pair of double peaks at 105.1 and 101.2 eV are ascribed to Hg 4f 5/2 and Hg 4f 7/2 in the high-resolution XPS spectra, respectively . Another pair of double peaks at 933.8 and 954.0 eV can be attributed to Cu 2p 3/2 and Cu 2p 1/2 , respectively, accompanied by two satellite peaks at 939.1 and 943.1 eV.…”

Section: Resultsmentioning

confidence: 86%

A Three-Dimensional Porous Organic Framework for Highly Selective Capture of Mercury and Copper Ions

Zhuang

Wang

et al. 2019

ACS Appl. Polym. Mater.

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In this study, a crystal porous organic framework (POF) belonging to ctn topology (POFct-1) is synthesized to selectively scavenge Hg(II) and Cu(II) ions. The maximum adsorption capacities of 167.19 mg g −1 and 135.60 mg g −1 are achieved toward Hg(II) and Cu(II) ions, respectively. In addition, the Langmuir isotherm model plus pseudosecond-order kinetic model for Hg(II) and Cu(II) ions can well describe the adsorption process of POFct-1. After five repeated uses, POFct-1 still exhibits high adsorption capacities. Conversely, a POF in amorphous form (POFct-2) is synthesized by changing the pressure and atmospheric conditions. The distribution coefficients of Cu (II) ions for the crystal (POFct-1) and amorphous (POFct-2) forms are 1.01 × 10 5 and 5.93 × 10 2 mL g −1 in a single ion solution, respectively. These results indicate that the POF in crystal form exhibits increased adsorption selectivity toward Cu(II) ions. The diverse structures and performances of POFs present them as promising candidates in selective adsorption of heavy metal ions.

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Section: Resultsmentioning

confidence: 86%

A Three-Dimensional Porous Organic Framework for Highly Selective Capture of Mercury and Copper Ions

Zhuang

Wang

et al. 2019

ACS Appl. Polym. Mater.

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“…However, reducing the pollutants to drinkable levels is still challenging, and there are several excellent materials in recent years (they were listed and compared in Table S1). [ 4–7 ] For example, Prof. Abbas et al. synthesized nanocomposite material, and the Hg 2+ in water was reduced to undetectable levels.…”

Section: Methodsmentioning

confidence: 99%

A Super‐Amphiphilic 3D Silicone Sponge with High Porosity for the Efficient Adsorption of Various Pollutants

Cao

Wang

et al. 2021

Macromol. Rapid Commun.

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Silicone sponge, which is nontoxic, highly flexible, insulated, and chemically inert, has great promise in the aerospace, electronics, and health care industries. However, the inherent surface properties and the harsh synthesis method limit its application. A super‐amphiphilic 3D silicone sponge is designed by a thiol‐ene click reaction for the first time. The sponge possesses high porosity, low density, excellent adsorption ability, and reusability for water, oil, emulsions, and Hg2+ or dyes or suspended solids in them. The sponge can selectively adsorb a very high amount (941.3 mg g−1) of Hg2+ from solutions (water, oil, emulsions) containing various ions at a nearly 100% removal efficiency. Cation dyes can also be selectively captured by the sponge. Furthermore, the sponge is designed as a filter element for a filtration system, and the content of the pollutants in the filtrate reaches drinkable levels after the Hg2+ and dye solutions are processed. The filter can be reused with almost unchanged filtration efficiency after a simple washing process. The successful treatment of actual/artificial polluted water proves its practical value.

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“…Usual ways of removal of mercury include ion exchange, chemical deposition, liquid-phase extraction, coagulation, and adsorption. ,− Among these techniques, adsorption has attracted extraordinary attention due to high efficiency, cost-effectiveness, easy operation, and low secondary pollutions . For this purpose, various adsorbent materials such as porous carbon, , zeolite, graphene, mesoporous silica, biopolymer, moss peat, and others have been investigated.…”

Section: Introductionmentioning

confidence: 99%

Novel Triazine-Based Covalent Organic Framework as a Superadsorbent for the Removal of Mercury(II) from Aqueous Solutions

Afshari

Dinari

Zargoosh

et al. 2020

Ind. Eng. Chem. Res.

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The aim of this work was to develop a superadsorbent for the removal of Hg2+ ions from aqueous solutions. In this regard, a porous covalent triazine ring-based nanoneedle was synthesized through a facile hydrothermal method. The structure and morphology of the synthesized covalent triazine ring-based adsorbent were characterized by different techniques. The structural stability of the synthesized superadsorbent was examined under different temperatures and pH conditions. The maximum adsorption capacity of the prepared organic framework is 1826 mg g–1 for removing Hg2+ ions at ambient temperature and an optimum pH of 5. Different linear and nonlinear models were applied for the fitting of the obtained adsorption data. It was found that the adsorption data can be well fitted to the linear Langmuir model (R 2 = 0.998). The adsorption kinetics can also be well described by the linear pseudo-second-order model. To make a portable, highly sensitive, and low-cost device for in situ sensing of trace amounts of Hg2+ ions, the smartphone colorimeter platform was developed using accessible equipment. The response of the developed system for the determination of Hg2+ ions was linear in the concentration range of 0.25–15 mg L–1, and the detection limit of the system is 0.063 mg L–1 Hg2+. The total cost of the developed system is lower than 400 US dollars, and the cost of each analysis is lower than 0.05 US dollars. Ultrahigh adsorption capacity, chemical stability, and fast adsorption kinetics make the synthesized triazine-based covalent organic framework a suitable candidate for the removal of Hg2+ ions from industrial effluents.

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Facile Fabrication of N-Doped Magnetic Porous Carbon for Highly Efficient Mercury Removal

Cited by 24 publications

References 56 publications

A Three-Dimensional Porous Organic Framework for Highly Selective Capture of Mercury and Copper Ions

A Three-Dimensional Porous Organic Framework for Highly Selective Capture of Mercury and Copper Ions

A Super‐Amphiphilic 3D Silicone Sponge with High Porosity for the Efficient Adsorption of Various Pollutants

Novel Triazine-Based Covalent Organic Framework as a Superadsorbent for the Removal of Mercury(II) from Aqueous Solutions

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