Separation of valuables from spent selective catalytic reduction catalyst leaching solution by fabricated anion extraction resins

Kim, Joung Woon; Hwang, Inju

doi:10.1016/j.jece.2017.11.040

Cited by 13 publications

(4 citation statements)

References 35 publications

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“…The Langmuir isotherm model provided the best fit for the investigated BSA adsorption isotherms compared with other models ( Table S3 ). The Stum and Morgan equation is as follows [ 46 ]:

where C e (µg/mL) is the BSA concentration in the solution at equilibrium; b (mL/µg) is the Langmuir constant; q e (mg/g) is the amount of BSA adsorbed at equilibrium; and q m (mg/g) is the theoretical maximum adsorption capacity. The Langmuir parameters for BSA adsorption are presented in Table 3 .…”

Section: Resultsmentioning

confidence: 99%

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pH-Responsive Cellulose/Silk/Fe3O4 Hydrogel Microbeads Designed for Biomedical Applications

Weon,

Na,

Han

et al. 2024

Gels

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In this study, cellulose/Fe3O4 hydrogel microbeads were prepared through the sol–gel transition of a solvent-in-oil emulsion using various cellulose-dissolving solvents and soybean oil without surfactants. Particularly, 40% tetrabutylammonium hydroxide (TBAH) and 40% tetrabutylphosphonium hydroxide (TBPH) dissolved cellulose at room temperature and effectively dispersed Fe3O4, forming cellulose/Fe3O4 microbeads with an average diameter of ~15 µm. Additionally, these solvents co-dissolved cellulose and silk, allowing for the manufacture of cellulose/silk/Fe3O4 hydrogel microbeads with altered surface characteristics. Owing to the negatively charged surface characteristics, the adsorption capacity of the cellulose/silk/Fe3O4 microbeads for the cationic dye crystal violet was >10 times higher than that of the cellulose/Fe3O4 microbeads. When prepared with TBAH, the initial adsorption rate of bovine serum albumin (BSA) on the cellulose/silk/Fe3O4 microbeads was 18.1 times higher than that on the cellulose/Fe3O4 microbeads. When preparing TBPH, the equilibrium adsorption capacity of the cellulose/silk/Fe3O4 microbeads for BSA (1.6 g/g) was 8.5 times higher than that of the cellulose/Fe3O4 microbeads. The pH-dependent BSA release from the cellulose/silk/Fe3O4 microbeads prepared with TBPH revealed 6.1-fold slower initial desorption rates and 5.2-fold lower desorption amounts at pH 2.2 than those at pH 7.4. Cytotoxicity tests on the cellulose and cellulose/silk composites regenerated with TBAH and TBPH yielded nontoxic results. Therefore, cellulose/silk/Fe3O4 microbeads are considered suitable pH-responsive supports for orally administered protein pharmaceuticals.

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“…The Langmuir isotherm model provided the best fit for the investigated BSA adsorption isotherms compared with other models ( Table S3 ). The Stum and Morgan equation is as follows [ 46 ]:

Section: Resultsmentioning

confidence: 99%

“…The Langmuir isotherm model provided the best fit for the investigated BSA adsorption isotherms compared with other models (Table S3). The Stum and Morgan equation is as follows [46]:…”

Section: Characteristics Of Cellulose/silk/fe3o4 Hydrogel Microbeads ...mentioning

confidence: 99%

pH-Responsive Cellulose/Silk/Fe3O4 Hydrogel Microbeads Designed for Biomedical Applications

Weon,

Na,

Han

et al. 2024

Gels

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“…The ion exchange method mainly uses ion exchange resins to separate and purify V and W ions based on their different selectivity for these ions. Kim et al 107 adsorbed W and V on synthetic extraction resins and then desorbed them for recovery from the separated sodium silicate. According to the analysis of the adsorption mechanism of the synthetic resins, W followed an ion-exchange sorption mechanism, while V followed a physical sorption mechanism; the sorption of V was less than that of W because of the higher selectivity for WO 4 2− than for VO 3 − .…”

Section: 24b Ion Exchange Methodmentioning

confidence: 99%

“…The ion exchange method mainly uses ion exchange resins to separate and purify V and W ions based on their different selectivity for these ions. Kim et al . adsorbed W and V on synthetic extraction resins and then desorbed them for recovery from the separated sodium silicate.…”

Section: Recycling Of Spent Vanadium–titanium Scr Catalystsmentioning

confidence: 99%

Strategy and Technical Progress of Recycling of Spent Vanadium–Titanium-Based Selective Catalytic Reduction Catalysts

Zhao,

Zhang,

Yang

et al. 2024

ACS Omega

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Selective catalytic reduction denitration technology, abbreviated as SCR, is essential for the removal of nitrogen oxide from the flue gas of coal-fired power stations and has been widely used. Due to the strong demand for energy and the requirements for environmental protection, a large amount of SCR catalyst waste is produced. The spent SCR catalyst contains high-grade valuable metals, and proper disposal or treatment of the SCR catalyst can protect the environment and realize resource recycling. This review focuses on the two main routes of regeneration and recycling of spent vanadium−titanium SCR catalysts that are currently most widely commercially used and summarizes in detail the technologies of recycling, high-efficiency recycling, and recycling of valuable components of spent vanadium−titanium SCR catalysts. This review also discusses in depth the future development direction of recycling spent vanadium−titanium SCR catalysts. It provides a reference for promoting recycling, which is crucial for resource recovery and green and lowcarbon development.

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Effect of granulating characteristics on harmless disposal of waste selective catalytic reduction catalyst in iron ore sintering process

Zhou

Zuo

et al. 2020

Asia-Pacific J Chem Eng

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The harmless treatment of waste selective catalytic reduction catalyst has become a thorny problem. In this investigation, a new method of harmless disposal of waste catalyst by utilizing iron ore sintering process is proposed, and the effect of granulating characteristics is studied. Results show that better bed permeability, shorter sintering time, and faster flame front speed could be characterized by applying higher granulating moisture. Sinter mineral and microstructure research found that wider distribution of skeleton‐crystal hematite while less calcium ferrite could be observed at higher granulating moisture. The porosity of sinter increases from 30.82% for granulating moisture 6.0% to 36.54% for granulating moisture 7.5% while the circle factor of pores decreases. Sinter index research results indicate that both tumbler index and yield have a descended trend whereas flame front speed increases with higher granulating moisture added. Productivity first increases then drops with increasing granulating moisture. Finally, a comprehensive index is used to evaluate the influence of granulating characteristics on sintering process, which first increases from 100 to 121 as granulating moisture increases from 6% to 6.5% then drops to 70.8 when granulating moisture further increases to 7.5%. The granulating moisture of 6.5% is recommended in present study.

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Separation of valuables from spent selective catalytic reduction catalyst leaching solution by fabricated anion extraction resins

Cited by 13 publications

References 35 publications

pH-Responsive Cellulose/Silk/Fe3O4 Hydrogel Microbeads Designed for Biomedical Applications

pH-Responsive Cellulose/Silk/Fe3O4 Hydrogel Microbeads Designed for Biomedical Applications

Strategy and Technical Progress of Recycling of Spent Vanadium–Titanium-Based Selective Catalytic Reduction Catalysts

Effect of granulating characteristics on harmless disposal of waste selective catalytic reduction catalyst in iron ore sintering process

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