Elution profiles of lanthanides with α‐hydroxyisobutyric acid by ion exchange chromatography using fine resin

Trikha, Rahul; Sharma, Bal Krishan; Sabharwal, K. N.; Prabhu, K. Sumanth

doi:10.1002/jssc.201500628

Cited by 10 publications

(2 citation statements)

References 29 publications

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“…After iodine and chlorine separation, fractional Lns separation was performed with ion exchange chromatography. Gradient elution technique was applied due to the different distribution coefficients of Lns in the DOWEX 50WX8 cation exchanger (Alfa Aesar: resin bed length was 4.5 and 1 cm in diameter) and α-hydroxyisobutyric acid (α-HIB) separation system ,− (Figure , step 5). The elution efficiency of α-HIB is lower at low pH (<4); therefore, α-HIB solutions were prepared at pH 4.6.…”

Section: Methodsmentioning

confidence: 99%

Radiochemical Determination of Long-Lived Radionuclides in Proton-Irradiated Heavy-Metal Targets: Part I—Tantalum

et al. 2017

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In this study, distillation, precipitation, and ion-exchange methods were chosen for the separation of the long-lived β-emitters I,Cl and the α-emitters Dy,Gd, Gd, andSm from Ta targets irradiated with protons up to 2.6 GeV to determine their production cross sections. Measurements of I/I and Cl/Cl ratios were performed with accelerator mass spectrometry. After separation of the lanthanides, the molecular plating technique was applied to prepare thin samples to obtain highly resolved α-spectra. Autoradiography and focused ion beam/scanning electron microscopy techniques were used to characterize the lanthanide deposited layer. Experimental cross-section data are compared with theoretical predictions obtained with INCL++ and ABLA07 code, and a satisfactory agreement is observed.

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Section: Methodsmentioning

confidence: 99%

Radiochemical Determination of Long-Lived Radionuclides in Proton-Irradiated Heavy-Metal Targets: Part I—Tantalum

et al. 2017

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“…The use of IL is facing also problems of recyclability, which may additionally increase the costs. Ion-exchange resins are a cheaper and greener alternative242526272829, but often have selectivity problems, leading to parallel uptake of other cations such as iron might interfere and foul the resin. Another intrinsic drawback of resins is their relatively quick aging.…”

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confidence: 99%

Unusual seeding mechanism for enhanced performance in solid-phase magnetic extraction of Rare Earth Elements

Legaria

Rocha

Tai

et al. 2017

Sci Rep

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Due to the increasing demand of Rare Earth Elements (REE or RE), new and more efficient techniques for their extraction are necessary, suitable for both mining and recycling processes. Current techniques such as solvent extraction or solid adsorbents entail drawbacks such as using big volumes of harmful solvents or limited capacity. Hybrid nanoadsorbents based on SiO2 and highly stable γ-Fe2O3-SiO2 nanoparticles, proved recently to be very attractive for adsorption of REE, yet not being the absolute key to solve the problem. In the present work, we introduce a highly appealing new approach in which the nanoparticles, rather than behaving as adsorbent materials, perform as inducers of crystallization for the REE in the form of hydroxides, allowing their facile and practically total removal from solution. This induced crystallization is achieved by tuning the pH, offering an uptake efficiency more than 20 times higher than previously reported (up to 900 mg RE3+/g vs. 40 mg RE3+/g). The obtained phases were characterized by SEM-EDS, TEM, STEM and EFTEM and 13C and 29Si solid state NMR. Magnetic studies showed that the materials possessed enough magnetic properties to be easily removed by a magnet, opening ways for an efficient and industrially applicable separation technique.

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Optimization of l‐arginine purification from Corynebacterium crenatum fermentation broth

Qiao

Huang

Long

et al. 2020

J of Separation Science

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Abstractl‐Arginine has many special physiological and biochemical functions, with wide applications in the food and pharmaceutical industry. Few studies on the purification of l‐arginine from fermentation broth have been conducted; however, none of them were systematic enough for industrial scale‐up. Therefore, it is necessary to develop a highly efficient and systematic process for the purification of l‐arginine from fermentation broth. In this study, we screened out a cation exchange resin, D155, having high exchange capacity, high selectivity, and easy elution capacity, and analyzed its adsorption isotherm, thermodynamics, and kinetics using different models. Further, the process parameters of fixed‐bed ion exchange adsorption and elution were optimized, and the penetration curve during the operation was modeled. Based on the fixed‐bed ion‐exchange parameters, a 30‐column continuous ion‐exchange system was designed, and the flow velocity in each zone was optimized. Finally, to obtain a high purity of l‐arginine, the purification tests were conducted using anion exchange resin 711, and an l‐arginine yield of 99.1% and purity of 98.5% was obtained. This effective and economical method also provides a promising strategy for separation of other amino acids from the fermentation broth, which is of great significance to the l‐arginine fermentation industry.

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Elution profiles of lanthanides with α‐hydroxyisobutyric acid by ion exchange chromatography using fine resin

Cited by 10 publications

References 29 publications

Radiochemical Determination of Long-Lived Radionuclides in Proton-Irradiated Heavy-Metal Targets: Part I—Tantalum

Radiochemical Determination of Long-Lived Radionuclides in Proton-Irradiated Heavy-Metal Targets: Part I—Tantalum

Unusual seeding mechanism for enhanced performance in solid-phase magnetic extraction of Rare Earth Elements

Optimization of l‐arginine purification from Corynebacterium crenatum fermentation broth

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