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Fabrication of granular three-dimensional graphene oxide/UiO-66 adsorbent for high uranium adsorption: Density functional theory and fixed bed column studies.
Choong, Choe Earn; Chang, Yoon-Young; Yang, Jae-Kyu; Kim, Jung Rae; Oh, Sang-Eun; Yoon, Yeomin; Jeon, Byong-Hun; Choi, Eun Ha; Jang, Min.
Afiliação
  • Choong CE; Department of Environmental Engineering, Kwangwoon University, Seoul 01897, the Republic of Korea; Plasma Bioscience Research Center/Department of Electrical and Biological Physics, Kwangwoon University, Seoul 01897, the Republic of Korea.
  • Chang YY; Department of Environmental Engineering, Kwangwoon University, Seoul 01897, the Republic of Korea.
  • Yang JK; Department of Environmental Engineering, Kwangwoon University, Seoul 01897, the Republic of Korea.
  • Kim JR; School of Chemical Engineering, Pusan National University, 63 Busandeahak-ro, Geumjeong-Gu, Busan 46241, the Republic of Korea.
  • Oh SE; Department of Biological Environment, Kangwon National University, 192-1 Hyoja-dong, Gangwon-do, Chuncheon-si 200-701, the Republic of Korea.
  • Yoon Y; Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, the Republic of Korea.
  • Jeon BH; Department of Environmental Science and Engineering, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, the Republic of Korea.
  • Choi EH; Plasma Bioscience Research Center/Department of Electrical and Biological Physics, Kwangwoon University, Seoul 01897, the Republic of Korea.
  • Jang M; Department of Environmental Engineering, Kwangwoon University, Seoul 01897, the Republic of Korea; Plasma Bioscience Research Center/Department of Electrical and Biological Physics, Kwangwoon University, Seoul 01897, the Republic of Korea. Electronic address: minjang@kw.ac.kr.
J Hazard Mater ; 477: 135237, 2024 Jul 20.
Article em En | MEDLINE | ID: mdl-39094305
ABSTRACT
This study presents a thorough investigation of the novel application of graphene oxide (GO) modified with melamine formaldehyde to fabricate granular three-dimensional GO (3D-GO), followed by the introduction of UiO-66 doping (3D-GO/U) for high uranium (U) adsorption. The U(VI) adsorption isotherms revealed that 3D-GO/U-10 with 10 % UiO-66 incorporation exhibited an impressive adsorption capacity of 375.5 mg g-1 and remained high U(VI) sorption performance in wide pH range. The introduction of UiO-66 to 3D-GO (3D-GO/U-10) led to the deagglomeration of the UiO-66 particles. The in situ surface-enhanced-Raman-spectroscopy-analysis and density-functional-theory simulations showed the symmetric metal center site Zr-O2 on UiO-66 was discovered to exhibit the highest adsorption energy (-3.21 eV) for U(VI) species due to the electrons transfer from the oxygen atom to U(VI) drives the covalent bonding between the symmetric metal center sites Zr-O2 and U(VI) on 3D-GO/U-10. The 3D-GO/U-10 was regenerated using a 0.1 M Na2CO3/0.01 M H2O2 solution and achieved up to 89.7 % U(VI) removal in the 5th cycle. The continuous flow column experiments results revealed 3D-GO/U-10 can regenerate and maintain a U(VI) removal capacity of ∼76 % for up to 4 cycles column experiments. Therefore, 3D-GO/U-10 exhibits great potential for removing U(VI) from water bodies.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Revista: J Hazard Mater Assunto da revista: SAUDE AMBIENTAL Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Revista: J Hazard Mater Assunto da revista: SAUDE AMBIENTAL Ano de publicação: 2024 Tipo de documento: Article