TY  - GEN
AB  - Concentrating simple organic molecules, such as amino acids, in the adsorbed phase could have been an early step in prebiotic evolution towards more complex bio-macromolecules on the early Earth. Smectite clay minerals represent potential selective sorbents for prebiotic molecules because of their negative structural charge and high surface area. This study explored the selective uptake and adsorption mechanisms of amino acids to montmorillonite, a well-characterized smectite. The effects of dissolved salt composition (NaCl vs MgCl₂) and pH (5 vs 7) on the uptake of amino acids to montmorillonite were investigated using adsorption isotherms. Amino acid binding to the clay mineral was determined through analysis of the final fluid composition using high-performance liquid chromatography (HPLC). The adsorption mechanisms of basic amino acids (L-arginine and L-lysine) were characterized using attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy and powder X-ray diffraction (XRD).
AD  - Washington University in St. Louis
AD  - Washington University in St. Louis
AD  - Washington University in St. Louis
AD  - Washington University in St. Louis
AU  - Millman, Emily
AU  - Chatterjee, Anamika
AU  - Parker, Kimberly
AU  - Catalano, Jeffrey
DA  - 2023-08-25
DO  - 10.7936/6rxs-103641
DO  - doi
ED  - Flynn, Elaine
ED  - Wang, Alian
ED  - Yong, Copland
ED  - Carpenter, Paul
ED  - DataCollector
ED  - DataCollector
ED  - DataCollector
ED  - DataCollector
ID  - 103641
KW  - Earth and related environmental sciences
KW  - prebiotic chemistry
KW  - amino acids
KW  - montmorillonite
KW  - adsorption
KW  - selectivity
L1  - https://data.library.wustl.edu/record/103641/files/Attenuated_Total_Reflectance_Fourier_Transform_Infrared_Spectra.zip
L1  - https://data.library.wustl.edu/record/103641/files/Powder_X-ray_Diffraction_Patterns.zip
L1  - https://data.library.wustl.edu/record/103641/files/readme_doi1079366rxs103641_Millman.txt
L1  - https://data.library.wustl.edu/record/103641/files/Speciation_Diagrams.zip
L1  - https://data.library.wustl.edu/record/103641/files/Adsorption_Isotherms.zip
L2  - https://data.library.wustl.edu/record/103641/files/Attenuated_Total_Reflectance_Fourier_Transform_Infrared_Spectra.zip
L2  - https://data.library.wustl.edu/record/103641/files/Powder_X-ray_Diffraction_Patterns.zip
L2  - https://data.library.wustl.edu/record/103641/files/readme_doi1079366rxs103641_Millman.txt
L2  - https://data.library.wustl.edu/record/103641/files/Speciation_Diagrams.zip
L2  - https://data.library.wustl.edu/record/103641/files/Adsorption_Isotherms.zip
L4  - https://data.library.wustl.edu/record/103641/files/Attenuated_Total_Reflectance_Fourier_Transform_Infrared_Spectra.zip
L4  - https://data.library.wustl.edu/record/103641/files/Powder_X-ray_Diffraction_Patterns.zip
L4  - https://data.library.wustl.edu/record/103641/files/readme_doi1079366rxs103641_Millman.txt
L4  - https://data.library.wustl.edu/record/103641/files/Speciation_Diagrams.zip
L4  - https://data.library.wustl.edu/record/103641/files/Adsorption_Isotherms.zip
LA  - eng
LK  - https://data.library.wustl.edu/record/103641/files/Attenuated_Total_Reflectance_Fourier_Transform_Infrared_Spectra.zip
LK  - https://data.library.wustl.edu/record/103641/files/Powder_X-ray_Diffraction_Patterns.zip
LK  - https://data.library.wustl.edu/record/103641/files/readme_doi1079366rxs103641_Millman.txt
LK  - https://data.library.wustl.edu/record/103641/files/Speciation_Diagrams.zip
LK  - https://data.library.wustl.edu/record/103641/files/Adsorption_Isotherms.zip
N2  - Concentrating simple organic molecules, such as amino acids, in the adsorbed phase could have been an early step in prebiotic evolution towards more complex bio-macromolecules on the early Earth. Smectite clay minerals represent potential selective sorbents for prebiotic molecules because of their negative structural charge and high surface area. This study explored the selective uptake and adsorption mechanisms of amino acids to montmorillonite, a well-characterized smectite. The effects of dissolved salt composition (NaCl vs MgCl₂) and pH (5 vs 7) on the uptake of amino acids to montmorillonite were investigated using adsorption isotherms. Amino acid binding to the clay mineral was determined through analysis of the final fluid composition using high-performance liquid chromatography (HPLC). The adsorption mechanisms of basic amino acids (L-arginine and L-lysine) were characterized using attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy and powder X-ray diffraction (XRD).
PY  - 2023-08-25
T1  - Amino Acid Adsorption to Montmorillonite: Selectivity and Binding Mechanisms
TI  - Amino Acid Adsorption to Montmorillonite: Selectivity and Binding Mechanisms
UR  - https://data.library.wustl.edu/record/103641/files/Attenuated_Total_Reflectance_Fourier_Transform_Infrared_Spectra.zip
UR  - https://data.library.wustl.edu/record/103641/files/Powder_X-ray_Diffraction_Patterns.zip
UR  - https://data.library.wustl.edu/record/103641/files/readme_doi1079366rxs103641_Millman.txt
UR  - https://data.library.wustl.edu/record/103641/files/Speciation_Diagrams.zip
UR  - https://data.library.wustl.edu/record/103641/files/Adsorption_Isotherms.zip
Y1  - 2023-08-25
ER  -