Fractal-like kinetics for enhanced boron adsorption on heterogeneous magnetic composite surfaces

被引：6

作者：

Pinotti, Camila N. ^{[1
]}

Ramos-Guivar, Juan A. ^{[2
]}

Proveti, Jose R. C. ^{[3
]}

Canchanya-Huaman, Yamerson ^{[2
]}

Arias-Contreras, Mayra-Alejandra ^{[2
]}

Checca-Huaman, Noemi-Raquel ^{[4
]}

Cipriano, Daniel F. ^{[3
]}

Muniz, Eduardo P. ^{[5
]}

Jesus, Honerio C. ^{[6
]}

Baabe, Dirk ^{[7
]}

Freitas, Jair C. C. ^{[1
,3
]}

Litterst, F. Jochen ^{[8
]}

Passamani, Edson C. ^{[1
,3
]}

机构：

[1] Univ Fed Espirito Santo, Programa Posgrad Fis, BR-29075910 Vitoria, Brazil

[2] Univ Nacl Mayor San Marcos, Fac Ciencias Fis, Grp Invest Nanotecnol Aplicada Biorremediac Ambien, Av Venezuela Cdra 34 S-N, Ciudad Univ, Lima 15081, Peru

[3] Univ Fed Espirito Santo, Dept Fis, BR-29075910 Vitoria, Brazil

[4] Ctr Brasileiro Pesquisas Fis CBPF, R Xavier Sigaud, 150, BR-22290180 Urca, RJ, Brazil

[5] Univ Fed Espirito Santo, Programa Posgrad Energia, Rodovia Governador Mario Covas, km 60, Bairro Lito, BR-29932540 Sao Mateus, ES, Brazil

[6] Univ Fed Espirito Santo, Dept Quim, Av Fernando Ferrari, 514, Bairro Goiabeiras, BR-29075910 Vitoria, ES, Brazil

[7] Tech Univ Carolo Wilhelmina Braunschweig, Inst Anorgan & Analyt Chem, D-38106 Braunschweig, Germany

[8] Tech Univ Carolo Wilhelmina Braunschweig, Inst Phys Kondensierten Materie, D-38106 Braunschweig, Germany

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2023年 / 308卷

关键词：

Boron removal; Fe-based composites; (57)Femossbauer spectroscopy; Al-27 and(11)B NMR; Magnetic separation; Heterogeneous adsorption; REMOVAL; NANOPARTICLES; DEPOSITION; ALUMINUM; BEHAVIOR; OXIDE;

D O I：

10.1016/j.matchemphys.2023.128313

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Co-precipitated 14 nm ?-Fe2O3 and 35 nm MgO nanoparticles (NPs) decorated on zeolite 5 A (Z5A) templates were systematically studied.Fe- 57 Mossbauer and transmission electron microscopy data indicated a broad particle size distribution. The spinel structure of ?-Fe2O3 is strongly affected by size effects (particles smaller than 10 nm in size have an octahedral/tetrahedral iron site ratio of 7/3 instead of 5/3 found in bulk). Al-27 nuclear magnetic resonance (NMR) showed the formation of octahedral Al species after boric acid reaction with MgO NPs.B- 11 NMR spectra indicated adsorption of B on the MgO/Z5A surface, whereas B adsorption in the pure Z5A framework is absent. Adsorption isotherms and kinetic studies of the nanohybrids showed that the B-rich species adsorption is described by Freundlich and fractal-like models, respectively. B adsorption occurs dominantly by the MgO fraction. The nanohybrids presented a good B removal efficiency when compared with other materials reported in literature.

引用

页数：15

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