Simões Dos Reis, Glaydson
- Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences
Research article2024Peer reviewed
Glaydson S. dos Reis; Diana Pinto; Sabrina F. Lütke; Éder C. Lima; Luis F.O. Silva; Irineu A.S. De Brum; Guilherme L. Dotto
Chitin powder and chitin-aerogel were prepared from shrimp wastes and used to uptake Y3+ from aqueous solutions and concentrate this rare earth element from phosphogypsum (PG). Chitin aerogel displays a specific surface area of 945 m2/g, while chitin powder is 3.6 m2/g, which largely influences its adsorption ability. Regarding the adsorption in synthetic solutions, the effect of pH on Y3+ removal is strong for chitin powder adsorbent. In contrast, no big pH influence was detected for chitin aerogel. Electrostatic interactions and chelation can highlight the proposed mechanism of Y3+ on chitin adsorbents for the powder and aerogel. Furthermore, in addition to these interactions, pore filling/pore diffusion is the main mechanism of Y3+ removal in the chitin aerogel. Chitin aerogel is efficient in concentrating 8 times the Y3+ from PG, a very complex matrix. The complex chitin aerogel-Y3+ can be a secondary source of rare earth elements for other applications.
Rare earths; Sustainable material; Chitin powder; Chitin porous aerogel; Yttrium adsorption and recovery
Journal of Rare Earths
2024, Volume: 42, number: 4, pages: 775-782
Physical Chemistry
DOI: https://doi.org/10.1016/j.jre.2023.04.008
https://res.slu.se/id/publ/122382