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

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

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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 adsor-bents 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 earthsSustainable materialChitin powderChitin porous aerogelYttrium adsorption and recovery

Glaydson S.dos Reis、Diana Pinto、Sabrina F.Lütke、éder C.Lima、Luis F.O.Silva、Irineu A.S.De Brum、Guilherme L.Dotto

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Department of Forest Biomaterials and Technology,Biomass Technology Centre,Swedish University of Agricultural Sciences,Umea,SE,901 83,Sweden

Universidad De La Costa,Calle 58 # 55-66,080002,Barranquilla,Atlántico,Colombia

Research Group on Adsorptive and Catalytic Process Engineering(ENGEPAC),Federal University of Santa Maria,Av.Roraima,1000-7,97105-900,Santa Maria,RS,Brazil

Institute of Chemistry,Federal University of Rio Grande do Sul,90040-060,Porto Alegre,Brazil

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Brazilian National Council for Scientific and Technological Development/CNPqBrazilian National Council for Scientific and Technological Development/CNPqCoordination for the Improvement of Higher Education Personnel/CAPES(CAPES-PRINT Program)

405982/2022-4303992/2021-2

2024

10.1016/j.jre.2023.04.008

稀土学报(英文版)
中国稀土学会

稀土学报(英文版)

CSTPCDEI
影响因子：1.3
ISSN：1002-0721
年,卷(期)：2024.42(4)
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