Adsorption of yttrium(Y^(3+)) and concentration of rare earth elements from phosphogypsum using chitin and chitin aerogel  

作　　者：Glaydson S.dos Reis Diana Pinto Sabrina F.Lütke Eder C.Lima Luis F.O.Silva Irineu A.S.De Brum Guilherme L.Dotto 

机构地区：[1]Department of Forest Biomaterials and Technology Biomass Technology Centre,Swedish University of Agricultural Sciences,Umea,E13Swedn [2]Universidad De La Costa,Calle 58#55-66,080002,Barranquilla,Atlantico,Colombia [3]Research Group on Adsorptive and Catalytic Process Engineering(ENGEPAC),Federal University of Santa Maria,Av.Roraima,10007,9705900,Santa Maria,RS,Brazil [4]Institute of Chemistry,Federal University of Rio Grande do Sul,90040060,Porto Alegre,Brazil

出　　处：《Journal of Rare Earths》2024年第4期775-782,共8页稀土学报（英文版）

基　　金：Project supported by Brazilian National Council for Scientific and Technological Development/CNPq(405982/2022-4,303992/2021-2);Coordination for the Improvement of Higher Education Personnel/CAPES(CAPESPRINT Program)。

摘　　要：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.

关 键 词：Rare earths Sustainable material Chitin powder Chitin porous aerogel Yttrium adsorption and recovery 

分 类 号：TQ133.3[化学工程—无机化工] TQ427.26[理学—物理化学] O647.3[理学—化学]