Carbon quantum dots doped with nitrogen for identification and tracing of microplasticsfrom the southern Caspian SeaCase study: bio-nanocomposite hydrogels based on chitosan/gellan gum/NCQD foradsorbing MPs

Microplastics (MPs) pose severe environmental and health risks, necessitating rapid identification andadsorption methods. We propose a straightforward approach using Nitrogen-doped carbon quantum dots(NCQD) for efficient MP identification, tracing, and adsorption. The resulting NCQDs, exhibiting hydrophobicaffinity and fluorescence emission, enable UV-based tracing without complex equipment. Additionally, an ecofriendlychitosan- NCQD/Gellan gum nanocomposite hydrogel film effectively removes various MPs (PS, PET, PA)from Caspian Sea at pH ۶–۸, achieving notable removal efficiencies (۸۵.۶–۹۹.۱%). The film demonstratessustained efficacy over multiple uses, making CS-NCQD/GG a promising solution for combatting MPs pollutionin diverse environments.

کلیدواژه ها:

Microplastics ، Carbon Quantum Dots ، Nanocomposite