L−Lysine Amino Acid Adsorption on Zeolite L: a Combined Synchrotron, X‐Ray and Neutron Diffraction Study

Beltrami, Giada; Martucci, Annalisa; Pasti, Luisa; Chenet, Tatiana; Ardit, Matteo; Gigli, Lara; Cescon, Mirco; Suard, Emmanuelle

doi:10.1002/open.202000183

Cited by 5 publications

(14 citation statements)

References 41 publications

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“…Moreover, Beltrami et al have assigned a similar role to water in L-lysine adsorption in zeolites. 30 Considering the dimensions of the adsorbate and adsorbent, the adsorption mechanism proposed by Chenet et al is plausible for L-lysine adsorption on different zeolites. Moreover, it states that the electrostatic attraction between the protonated side-chain amino group and the zeolitic surface is crucial for L-lysine adsorption.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Different micropore volumes showed no influence on water adsorption since water is not limited by diffusion through the microporous systems. 30 By analyzing the shape of water vapor sorption isotherms (isotherm type), insights into the polarity of the surface can be obtained. This allows qualitative assessments of the affinity of polar substances toward the zeolites.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…L-Lysine adsorbs at a pH of 10, predominantly due to the negatively charged zeolite surface and the resulting electrostatic repulsion by the deprotonated carboxyl group via the side-chain amino acid functionality, which is supported by several studies. 20,27,30,31,40 Chenet et al have proposed an adsorption mechanism for zwitterionic Llysine in zeolites in which L-lysine is adsorbed horizontally through the protonated amino group of the side chain with the help of surrounding water molecules. 31 L-Lysine can adsorb horizontally through the protonated amino group of the side chain to framework oxygen by forming hydrogen bonds in the ZSM5 lattice.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…12 Beltrami et al investigated the role of micropores in L-lysine adsorption on zeolite L, a zeolite with 12-membered ring micropores and a pore diameter of 7.1 Å. 30 Thus, the microporous channel system of the zeolite is comparable to the that of β and Y zeolite groups. It was found that the microporous channels promote L-lysine adsorption while allowing unlimited water diffusion through the pores.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…29 Beltrami et al investigated L-lysine adsorption on zeolite L, reporting an adsorption capacity of 97 mg g −1 . 30 Chenet et al postulated an adsorption mechanism, stating that the adsorption of L-lysine on ZSM5 is a surface-confined supramolecular self-assembly process. 31 The selective separation of L-lysine from lysine−glucose mixtures by zeolites has, to date and to the best of our knowledge, not yet been discussed in the literature.…”

Section: ■ Introductionmentioning

confidence: 99%

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Separation by Size Exclusion: Selective Liquid-Phase Adsorption of l-Lysine from Lysine–Glucose Mixtures on Zeolites

Deischter

Müller

Bong

et al. 2022

ACS Sustainable Chem. Eng.

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l-Lysine is an essential amino acid of great importance for the pharmaceutical and nutrition industries and is mainly produced by the fermentative conversion of d-glucose. The technological bottleneck for an efficient process is often the development of separation and purification technologies as they can account for 20–50% of the overall operation costs. Liquid-phase adsorption on zeolites is an energy-, resource-, and cost-saving alternative. Zeolites are a well-established and widely available class of adsorbents. In this research, a variety of commercial zeolites of different framework types with varying Si/Al ratios were used to investigate the adsorption of l-lysine from single-component solutions and lysine–glucose mixtures. l-Lysine recovery resulted in adsorption capacities of up to 169 mg g–1 on Hβ-30 in batch experiments. Zeolites showed high l-lysine selectivity in competitive adsorptions from lysine–glucose mixtures, outperforming previously reported adsorbents. Based on the analysis of adsorbent and adsorbate dimensions, a size-exclusion-based separation of l-lysine from d-glucose was proposed, which was found to be primarily responsible for the high l-lysine selectivity. Fourier transform infrared spectroscopy analysis allowed proposing a structure–adsorption relationship for l-lysine on zeolites. The transferability of the batch results to a continuous process was shown. In addition, a high desorption efficiency of up to 90% using water as the desorption solution could be achieved, complemented by successful recyclability tests over five consecutive adsorption–desorption cycles.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Separation by Size Exclusion: Selective Liquid-Phase Adsorption of l-Lysine from Lysine–Glucose Mixtures on Zeolites

Deischter

Müller

Bong

et al. 2022

ACS Sustainable Chem. Eng.

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Influence of Different Types of Clay Minerals on the Shape and Form of Silica-Carbonates (Biomorphs) of Ca(II), Ba(II), and Sr(II)

Cuéllar‐Cruz

Ramírez-Cardona

Islas

et al. 2022

ACS Earth Space Chem.

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The array of atmospheric and chemical conditions that prevailed during the Precambrian era favored the origin of life in our planet. The minerals and rocks that existed in that era catalyzed the synthesis of the first biomolecules. It has been shown that mineral clays possess the best-suited mineral surface to study the polymerization of protobiomolecules because they catalyze the binding of monomers to form peptides and nucleic acids and foster the binding between them. Inorganic structures exist formed by silica-carbonates of calcium, barium, or strontium, called biomorphs, which emulate the morphological structure of diverse organisms. Some of these morphologies resemble several of the microfossils found in the Precambrian cherts. Notwithstanding, it has not been documented yet whether biomorphs are a consequence of the dissolution of clays in alkaline environments (rich in alkaline earth metals) during the initial stages of the Earth, which would favor the hypothesis that the biomorphs or cherts existed since that time. To know whether biomorphs could have been embedded within minerals or in diverse types of clays and contributed to the synthesis of protobiomolecules, we aimed at synthesizing biomorphs in the presence of different clays of natural origin in two synthesis conditions that resemble both the atmosphere of the Precambrian era and that of the current time, regarding the CO2 concentration. Our results revealed that in the condition emulating the Precambrian, polymorphs of calcite, aragonite, and vaterite were formed. The barium and strontium biomorphs adopted the morphology of radiolarians, diatoms, and foraminifers in this same condition, indicating that they could be the first structure of these organisms. Results also revealed that the clays present in the Precambrian together with the prevailing environmental conditions played a preponderant role as catalyzers in the structural morphology, chemical composition, and crystalline habit adopted by the first organisms. Biomorphs could have been the first inorganic structures with a structural order and characteristic shape (preserving biomolecules in their interior when they were formed) that were synthetized in the early era of our planet, but they have not been dated as a fossil registry.

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Neutron scattering studies of the methanol-to-hydrocarbons reaction

Zachariou

Hawkins

Collier

et al. 2023

Catal. Sci. Technol.

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L−Lysine Amino Acid Adsorption on Zeolite L: a Combined Synchrotron, X‐Ray and Neutron Diffraction Study

Cited by 5 publications

References 41 publications

Separation by Size Exclusion: Selective Liquid-Phase Adsorption of l-Lysine from Lysine–Glucose Mixtures on Zeolites

Separation by Size Exclusion: Selective Liquid-Phase Adsorption of l-Lysine from Lysine–Glucose Mixtures on Zeolites

Influence of Different Types of Clay Minerals on the Shape and Form of Silica-Carbonates (Biomorphs) of Ca(II), Ba(II), and Sr(II)

Neutron scattering studies of the methanol-to-hydrocarbons reaction

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