Adsorption of yttrium (Y<SUP>3</SUP>+) and concentration of rare earth elements from phosphogypsum using chitin and chitin aerogel*

Glaydson S. dos Reis, Diana Pinto, Sabrina F. Luetke, Eder C. Lima, Luis F. O. Silva, Irineu A. S. De Brum, Guilherme L. Dotto

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

7 Citeringar (Scopus)

Sammanfattning

Chitin powder and chitin-aerogel were prepared from shrimp wastes and used to uptake Y 3+ from aqueous solutions and concentrate this rare earth element from phosphogypsum (PG). Chitin aerogel displays a specific surface area of 945 m 2/g, while chitin powder is 3.6 m 2/g, which largely influences its adsorption ability. Regarding the adsorption in synthetic solutions, the effect of pH on Y 3+ 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 Y 3+ on chitin adsorbents for the powder and aerogel. Furthermore, in addition to these interactions, pore filling/pore diffusion is the main mechanism of Y 3+ removal in the chitin aerogel. Chitin aerogel is efficient in concentrating 8 times the Y 3+ from PG, a very complex matrix. The complex chitin aerogel-Y 3+ can be a secondary source of rare earth elements for other applications.

OriginalspråkEngelska
Sidor (från-till)775-782
TidskriftJournal of Rare Earths
Volym42
Nummer4
DOI
StatusPublicerad - 30 apr. 2024
Externt publiceradJa
MoE-publikationstypA1 Tidskriftsartikel-refererad

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