Adsorption mechanism of aliphatic amino acids on kaolinite surfaces

Exploring the biointerfaces: ab initio investigation of nano-montmorillonite clay, and its interaction with unnatural amino acids

“…However, the main contribution to the amino acid binding comes from the -NH 2 group, which is in agreement with results obtained via FT-IR spectra, 31 but contrary to another study performed on the adsorption of amino acids on kaolinite surfaces, where the primary role in bonding with the clay surface is played by the -COOH group. 65 The parallel alignment, which is the lowest energy alignment, on the surface significantly affects the contribution of the -COOH group on binding. For instance, even though DCline amino acid has two -NH, one -NH 2 , and one -COOH group, its binding energy is about 0.6 eV less than 44-APBA.…”

Separation of Tripeptides in Binary Mixtures Using Ion-Exchange Membrane Adsorber

“…∑ n j=1 b j ⋅c j eq (4) Notice that both equations depend on the individual adsorption/ desorption rate constants (k ai and k di ), and, unfortunately, they usually fail in the correlation of experimental competitive adsorption [32].…”

“…Several different types of adsorbents have shown high binding capacity for peptides. The main adsorbents used are formed by microporous inorganic solids, such as clays [3][4][5], zeolites [6,7], and activated carbon [8,9]. However, the adsorption of peptides onto several polymeric resins [10,11] and, recently, onto metal-organic sorbents [12] has also been studied.…”

Investigating the Influence of Impurity Defects on the Adsorption Behavior of Hydrated Sc3+ on the Kaolinite (001) Surface Using Density Functional Theory

“…Kremleva et al [19] employed DFT to investigate the adsorption of uranyl ions on kaolinite basal planes, revealing that adsorption complexes formed with deprotonated OH groups on the Al(o) surface exhibited superior adsorption energies. Kasprzhitskii et al's [20] DFT study focuses on aliphatic amino acids' adsorption mechanisms on kaolinite surfaces, emphasizing the key role of amino acids' carboxyl groups in hydrogen bonding interactions. Lainé et al [21] explored the adsorption of phenol, toluene, CO 2 , and water on kaolinite using density functional theory and ab initio molecular dynamics.…”