Adsorption of yttrium (Y3+) and concentration of rare earth elements from phosphogypsum using chitin and chitin aerogel

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...

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Autores:: dos Reis, Glaydson S.
Pinto, Diana
Lütke, Sabrina F.
Lima, Éder C.
Silva Oliveira, Luis Felipe
De Brum, Irineu A.S.
Dotto, Guilherme Luiz

Tipo de recurso:: Article of investigation

Fecha de publicación:: 2024

Institución:: Corporación Universidad de la Costa

Repositorio:: REDICUC - Repositorio CUC

Idioma:: eng

Description
Summary:	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.

Adsorption of yttrium (Y3+) and concentration of rare earth elements from phosphogypsum using chitin and chitin aerogel

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