Engineered polyaramides for extraction of bioamines from water

Area of Science:

• Materials Science
• Environmental Chemistry
• Analytical Chemistry

Background:

• Biogenic amines (BAs) are compounds found in fermented foods and protein-rich products.
• High concentrations of BAs can lead to adverse health effects, including headaches and hypertension.
• Effective methods for removing BAs from water are crucial for public health and environmental safety.

Purpose of the Study:

• To synthesize and characterize novel polyaramides (PAs) for the efficient removal of biogenic amines from aqueous solutions.
• To evaluate the adsorption performance and kinetics of the synthesized PAs for five specific biogenic amines.
• To assess the reusability of the polyaramide adsorbents and demonstrate their application in a real-world sample.

Main Methods:

• Polyaramides were synthesized via the reaction of trimesoyl chloride with different diamines (ethylene diamine, p-xylene diamine, m-xylene diamine).
• Characterization of polyaramides was performed using techniques such as FTIR, XRD, SEM, TGA, and DLS.
• Adsorption experiments were conducted to determine removal efficiencies, and kinetic data were analyzed using Langmuir isotherm and pseudo-second-order models.
• Adsorbent regeneration was tested through acid washing, and application was demonstrated on a decaying fish sample, with analysis by LCMS.

Main Results:

• All synthesized polyaramides demonstrated high removal efficiencies for the target biogenic amines.
• The adsorption data fitted well with the Langmuir isotherm and pseudo-second-order kinetic models.
• One polyaramide (PA3) exhibited exceptional adsorption capacities, achieving over 97% removal for all tested amines.
• The polyaramide adsorbents were successfully regenerated and maintained high efficiency after five cycles.
• A 99% removal efficiency was achieved when applied to a decaying fish sample, with amines identified by LCMS.

Conclusions:

• Synthetic polyaramides are highly effective adsorbents for removing biogenic amines from water.
• The developed polyaramides show excellent adsorption capacity, reusability, and potential for application in environmental matrices.
• These functional materials offer a promising solution for mitigating health risks associated with biogenic amine contamination.