Selectively capacitive recovery of rare earth elements from aqueous solution onto Lewis base sites of pyrrolic-N doped activated carbon electrodes

Zhao, Feiping; Chen, Shixing; Xiang, Hongrui; Gao, Tianyu; Wang, Danyang; Wei, Dun; Sillanpää, Mika; Ke, Yanxiong; Tang, Chaobo

doi:10.1016/j.carbon.2022.06.033

Cited by 37 publications

(10 citation statements)

References 48 publications

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“…The results of the effect of temperature are shown in Figure 5 a, and as it is quite clear, with the increase in temperature from 20 to 50 °C, the removal percentage and adsorption capacity for both benzene and toluene increases, which shows that it is endothermic adsorption of benzene and toluene [ 55 , 56 ].…”

Section: Resultsmentioning

confidence: 99%

Removal of Benzene and Toluene from Synthetic Wastewater by Adsorption onto Magnetic Zeolitic Imidazole Framework Nanocomposites

Kyzas

McKay

Al-Musawi³

et al. 2022

Nanomaterials

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Considering the risk associated with exposure to benzene and toluene in water resources, researchers have been motivated to conduct studies to remove them from aqueous solutions. Thus, by performing the present study, the potential of Fe3O4/zeolite imidazolate framework nanoparticles (Fe3O4@ZIF-8) was evaluated for the adsorption of benzene and toluene. Accordingly, the solution pH, Fe3O4@ZIF-8 dosage, mixing time, concentration of benzene and toluene, and temperature, were the parameters considered for conducting the batch experiments, for which their effect on adsorption efficiency was evaluated. Our conducted experiments introduced the neutral pH as the best pH range to obtain the maximum removal. Fitting the adsorption data into the various models revealed the aptness of the Langmuir isotherm equation in describing experimental information and highest adsorption capacity; for benzene it was 129.4, 134.2, 137.3, and 148.2 mg g−1, but for toluene it was 118.4, 125.2, 129.6, and 133.1 mg g−1, for temperature 20, 30, 40, and 50 °C, respectively. Using obtained optimal conditions, the adsorption efficiencies of benzene and toluene were obtained to be 98.4% and 93.1%, respectively. Kinetic studies showed acceptable coefficients for PSO kinetics and confirmed its suitability. Also, the recyclability results showed that for six consecutive periods of the adsorption-desorption process, the percentage of removal decreased by only 6% for benzene and toluene. Moreover, calculating thermodynamic parameter changes for benzene and toluene removal confirmed the favorability and spontaneity of the studied process and its endothermic nature. Considering the above findings, Fe3O4@ZIF-8 was found to be an operative adsorbent for removing pollutants.

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Section: Resultsmentioning

confidence: 99%

Removal of Benzene and Toluene from Synthetic Wastewater by Adsorption onto Magnetic Zeolitic Imidazole Framework Nanocomposites

Kyzas

McKay

Al-Musawi³

et al. 2022

Nanomaterials

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“…According to Pearson's hard-soft Lewis acid-base principles, sulfide-based materials possess superior affinity toward many Lewis acidic soft heavy metal cations. 22 Recently, several novel metal sulfides such as [MoS 2 ], [WS 2 ], [K 2x Mn x Sn 3−x S 6 ], 23,24 chalcogenide-based clusters 13 and aerogels 25 have been successfully applied for highly efficient removal of heavy metals from contaminated gas, water, and soil. Among them, chalcogenide clusters such as [Sn 2 S 6 ] 4− , [SnS 4 ] 4− , and [MoS 4 ] 2− exhibit robust sulfur-active sites and pore structures 13,22,26 possessing a great potential in heavy metal capture.…”

Section: Introductionmentioning

confidence: 99%

“…22 Recently, several novel metal sulfides such as [MoS 2 ], [WS 2 ], [K 2x Mn x Sn 3−x S 6 ], 23,24 chalcogenide-based clusters 13 and aerogels 25 have been successfully applied for highly efficient removal of heavy metals from contaminated gas, water, and soil. Among them, chalcogenide clusters such as [Sn 2 S 6 ] 4− , [SnS 4 ] 4− , and [MoS 4 ] 2− exhibit robust sulfur-active sites and pore structures 13,22,26 possessing a great potential in heavy metal capture. However, owing to the mobility of nanoclusters, chalcogenide clusters cannot be utilized directly in practical application.…”

Section: Introductionmentioning

confidence: 99%

Unveiling the dual roles of the intercalation of [MoS₄]²⁻ clusters in boosting heavy metal capture by Ca–Al layered double hydroxide

Yang

Zhao

et al. 2023

Environ. Sci.: Nano

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“…The electrochemical leaching method seems to be an ideal choice for manganese leaching due to its short processing cycle and high efficiency in the leaching of manganese. However, the cost and secondary pollution of the electrochemical leaching method have to be optimized, especially for the practical industrial applications. , Significantly, most of the previous works have focused on the recovery of water-soluble manganese from EMR, while insoluble manganese, which is very high (usually >40%) in EMR from pyrolusite, was generally ignored.…”

Section: Introductionmentioning

confidence: 99%

Natural Pyrite-assisted Mechanochemical Recovery of Insoluble Manganese from Electrolytic Manganese Residue: Kinetics and Mechanisms

Xiang,

Yang,

Liu

et al. 2023

ACS EST Eng.

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Numerous traditional methods have been applied to extracting manganese from electrolytic manganese residue (EMR). However, most of them focused on the recovery of water-soluble manganese from EMR, while insoluble manganese, whose content is usually high in EMR, was generally ignored. Herein, the recovery of insoluble manganese in EMR was systematically investigated by a natural pyrite-assisted mechanochemical method. The recovery efficiency of insoluble manganese exceeded 86%, and the leaching efficiency of iron was lower than 1% under optimal conditions (the pyrite/EMR mass ratio of 4% and mechanochemical treatment at 300–500 rpm for 120 min). Toxicity characteristic leaching procedure experiments showed that after treatment the leaching concentration of manganese decreased by more than 12 times, and ammonia nitrogen decreased by 27 times, which met the regulatory discharge limit (GB/T 8978-1996). Tescan integrated mineral analyzer analysis directly confirmed that the insoluble Mn(IV) in treated EMR was completely reduced to soluble Mn(II), and iron was solidified in the forms of Fe–S-(Si–Al–O) and pyrrhotite. A potential mechanism could be that the insoluble manganese encapsulated in EMR matrix was exposed to the particle surface by the mechanochemical reaction; whereafter, the redox reaction between pyrite and insoluble Mn(IV) was facilitated by the generated crystal defects and surfaces with dangling bonds under mechanochemical action. This study provides a direction for the resource utilization of insoluble Mn(IV) in EMR and also expands the theoretical basis for exploring the reduction mechanism of pyrite-assisted mechanochemical method.

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Selectively capacitive recovery of rare earth elements from aqueous solution onto Lewis base sites of pyrrolic-N doped activated carbon electrodes

Cited by 37 publications

References 48 publications

Removal of Benzene and Toluene from Synthetic Wastewater by Adsorption onto Magnetic Zeolitic Imidazole Framework Nanocomposites

Removal of Benzene and Toluene from Synthetic Wastewater by Adsorption onto Magnetic Zeolitic Imidazole Framework Nanocomposites

Unveiling the dual roles of the intercalation of [MoS₄]²⁻ clusters in boosting heavy metal capture by Ca–Al layered double hydroxide

Natural Pyrite-assisted Mechanochemical Recovery of Insoluble Manganese from Electrolytic Manganese Residue: Kinetics and Mechanisms

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Selectively capacitive recovery of rare earth elements from aqueous solution onto Lewis base sites of pyrrolic-N doped activated carbon electrodes

Cited by 37 publications

References 48 publications

Removal of Benzene and Toluene from Synthetic Wastewater by Adsorption onto Magnetic Zeolitic Imidazole Framework Nanocomposites

Removal of Benzene and Toluene from Synthetic Wastewater by Adsorption onto Magnetic Zeolitic Imidazole Framework Nanocomposites

Unveiling the dual roles of the intercalation of [MoS4]2− clusters in boosting heavy metal capture by Ca–Al layered double hydroxide

Natural Pyrite-assisted Mechanochemical Recovery of Insoluble Manganese from Electrolytic Manganese Residue: Kinetics and Mechanisms

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Unveiling the dual roles of the intercalation of [MoS₄]²⁻ clusters in boosting heavy metal capture by Ca–Al layered double hydroxide