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

Sammanfattning

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 . (c) 2023 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.

Nyckelord

Rare earths; Sustainable material; Chitin powder; Chitin porous aerogel; Yttrium adsorption and recovery

Publicerad i

Journal of Rare Earths
2024, volym: 42, nummer: 4, sidor: 775-782

SLU författare

• Simões Dos Reis, Glaydson

  • Institutionen för skogens biomaterial och teknologi, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Fysikalisk kemi

Publikationens identifierare

• DOI: https://doi.org/10.1016/j.jre.2023.04.008

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/122382