A novel self-crosslinked gel microspheres of Premna microphylla turcz leaves for the absorption of uranium

Gong, Hongying; Lin, Xiaoyan; Xie, Yu; Liu, Lan; Zhou, Jianqin; Liao, Hui; Shang, Ran; Luo, Xin

doi:10.1016/j.jhazmat.2020.124151

Cited by 49 publications

(9 citation statements)

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“…The deconvolution of C 1s presented four functional groups, namely, C–C/C–H (284.8 eV), C–O/C–O–H (286.3 eV), O–C–O/CO (287.9 eV), and OC–O (288.9 eV) at different binding energies (BEs). , Additionally, the deconvolution of O 1s revealed two functional groups at different BEs, namely, C–OH (231.9 eV) and CO (232.9 eV) . These results demonstrate a considerable increase in C–O/C–OH after the freezing treatment.…”

Section: Resultsmentioning

confidence: 62%

Failure Mechanism of the Corrugated Medium under Simulated Cold Chain Logistics

Huang

et al. 2023

ACS Omega

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It is necessary to develop corrugated medium food packaging, which is suitable for highly humid environments, to meet the demands of cold chain logistics. In this paper, we investigated the influence of the transverse ring crush index of different environmental factors of corrugated medium and the failure mechanisms during cold chain transportation. After freeze−thaw treatment of corrugated medium, XRD and DP showed a decrease in crystallinity and polymerization of 3.47 and 7.83%, respectively. Also, the FT-IR spectra of the paper showed that the number of intermolecular hydrogen bonds decreased by about 3.00% after freezing. SEM and XRD showed CaCO 3 precipitation on the paper surface and a 26.01% increase in pore size. This study would be beneficial in further expanding the applications of cellulose-based paperboard cold chain transportation.

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Section: Resultsmentioning

confidence: 62%

Failure Mechanism of the Corrugated Medium under Simulated Cold Chain Logistics

Huang

et al. 2023

ACS Omega

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“…Once plant tissues are disrupted during juice processing, interactions between ACNs and constituents of cell wall such as pectin can occur [17]. At BMJ's pH, ACNs having positive charges interact strongly with hydroxyl and carboxylate sites [18], amide groups [19] or sugar rings [20] of pectin. Especially, at this pH, the flavylium cations bind to pectin mainly by hydrogen bonds, electrostatic interactions and dispersive contacts [18,20].…”

Section: Effect Of Enzymatic Treatment On Acns and Colour Of Bmjmentioning

confidence: 99%

“…At BMJ's pH, ACNs having positive charges interact strongly with hydroxyl and carboxylate sites [18], amide groups [19] or sugar rings [20] of pectin. Especially, at this pH, the flavylium cations bind to pectin mainly by hydrogen bonds, electrostatic interactions and dispersive contacts [18,20]. The interactions cause the changes in stability, colour properties, extractability and bioavailability of ACNs [21].…”

Section: Effect Of Enzymatic Treatment On Acns and Colour Of Bmjmentioning

confidence: 99%

“…The interactions cause the changes in stability, colour properties, extractability and bioavailability of ACNs [21]. Many studies showed that the interaction between pectin and ACNs resulted in high ACN stability [18,19,21,22]. However, since the pectin in CBMJ was degraded by the pectolytic enzymes during depectinization, the interaction between ACNs and pectin decreased.…”

Section: Effect Of Enzymatic Treatment On Acns and Colour Of Bmjmentioning

confidence: 99%

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Changes in anthocyanins and colour of black mulberry (Morus nigra) juice during clarification and pasteurization

et al. 2021

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The effects of enzymatic treatment, clarification with bentonite, gelatin and kieselsol, and pasteurization on the anthocyanins (ACNs) and colour of black mulberry juice (BMJ) were studied. Enzymatic treatment caused significant reductions in ACN content (10%), A max (53%), colour density (67%) and polymeric colour (67%). The most stable ACN to enzymatic treatment was cyanidin-3-glucoside (cy-3-glu), while the least stable one was pelargonidin-3-glucoside (pg-3-glu). Bentonite showed the copigmentation effect due to Al 3+ and Mg 2+ in its octahedral sheet structure and enhanced colour density (91%) of BMJ. Similarly, gelatin and kieselsol also caused a high A max and a colour density despite a reduction in ACN content. Results revealed that enzymatic degradation of pectin and removal of phenolics by gelatin-kieselsol led to a reduction in the colour density of BMJ after pasteurization. Therefore, bentonite is recommended to produce BMJ with high colour density, while enzymatic treatment and clarification with gelatin and kieselsol are not recommended due to a reduction in ACN content.

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“…The presence of monovalent and bivalent salts (∼3 × 10 5 mg/L of Na + ) in the leach liquor contributes to the inadequate uranium precipitation. Numerous studies on U-capture techniques, such as adsorption, coprecipitation, biotic reduction, ion-exchange, membrane separation (ultrafiltration for americium removal), and biosorption, have been reported by various researchers. − Due to the efficiency, scalability, ease of operation, and potential regeneration and reusability, adsorption is considered a promising technique to adsorb U from aqueous solution as well as real-life alkaline leach liquor. , Organometallics, biomass, polymer adsorbents, − metal–organic frameworks (MOFs), covalent organic frameworks (COFs), and porous organic polymers (POPs) are the most regularly used adsorbents to capture U from the actual alkaline solution. , Some photocatalytic reduction methods are also available in the literature to capture uranium from aqueous solutions. , In alkaline leach liquor, U is present as a carbonate complex (such as, [UO 2 (CO 3 ) 2 ] 2– and [UO 2 (CO 3 ) 3 ] 4– ) with low concentration (3.2 ppb), in the presence of other coexisting ions. ,− Thus, U removal from such liquor is quite challenging, and exceptional selectivity of the adsorbent is a prerequisite. Acrylamide-based polymeric adsorbents are widely used due to their excellent selectivity for adsorption of UO 2 2+ .…”

Section: Introductionmentioning

confidence: 99%

Efficient Adsorption and Desorption of Uranium(VI) Using a Polymeric Adsorbent: A Combined Theoretical and Experimental Approach with Real-Life Alkaline Leach Liquor

Das,

Jana,

Das

et al. 2024

Ind. Eng. Chem. Res.

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Alkaline leaching is used for the extraction of uranium from rarely available carbonate ore. A hyperbranched cross-linked polymeric adsorbent (HCPA) was developed for selective recovery of uranium(VI) (U) from real-life alkaline leach liquor. HCPA was synthesized using the free radical copolymerization of acrylamide and N, N-methylene bis(acrylamide). In addition, potassium persulfate (as the initiator) and dodecanethiol (as the brancher) were used to transfer the radicals for faster chain formation and smooth branching of the long-chain polymer. Several methods were used extensively to characterize the adsorbent. The Langmuir maximum U adsorption capacity of HCPA was 1012 mg/g at 303 K, and 98% of U was removed from alkaline leach liquor. U was adsorbed at pH 8.5 in the presence of various interfering co-ions and desorbed at pH 11.5 in the form of sodium diuranate (Na 2 U 2 O 7 ) precipitate. The adsorption was monolayer, exothermic, and spontaneous in nature. The C−N, CO− NH 2 , and C−OH groups of HCPA interacted with uranyl ions initiating the coordinative and electrostatic interactions leading to U adsorption. Continuous fixed-bed column runs were performed using the actual leach liquor, and a fundamental kinetic model was used to quantify the performance of columns. The transport parameters were estimated from the model, and scaling-up calculations were performed using these parameters. Five adsorption−desorption cycles were conducted to determine the reusability and structural stability of the synthesized polymeric adsorbent.

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A novel self-crosslinked gel microspheres of Premna microphylla turcz leaves for the absorption of uranium

Cited by 49 publications

References 48 publications

Failure Mechanism of the Corrugated Medium under Simulated Cold Chain Logistics

Failure Mechanism of the Corrugated Medium under Simulated Cold Chain Logistics

Changes in anthocyanins and colour of black mulberry (Morus nigra) juice during clarification and pasteurization

Efficient Adsorption and Desorption of Uranium(VI) Using a Polymeric Adsorbent: A Combined Theoretical and Experimental Approach with Real-Life Alkaline Leach Liquor

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