Zobrazit v EDS

Efficient adsorption of phosphate on magnetic Fe 3 O 4 @MOF@LDH superstructures: Kinetics, thermodynamics, and mechanisms.

Uloženo v:
Podrobná bibliografie
Název: Efficient adsorption of phosphate on magnetic Fe 3 O 4 @MOF@LDH superstructures: Kinetics, thermodynamics, and mechanisms.
Autoři: Liu Z; Division of Environment and Sustainability, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China; HKUST Shenzhen Research Institute, Hi-tech Park, Shenzhen, 518057, China., Han W; Division of Environment and Sustainability, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China; HKUST Shenzhen Research Institute, Hi-tech Park, Shenzhen, 518057, China., Marquina C; Instituto de Nanociencia y Materiales de Aragón (INMA) & Laboratory of Advanced Microscopies (LMA), Universidad de Zaragoza, 50018, Zaragoza, Spain; Departamento de Física de la Materia Condensada, Facultad de Ciencias, Universidad de Zaragoza, 50009, Zaragoza, Spain., Kwan JKC; Division of Environment and Sustainability, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China; HKUST Shenzhen Research Institute, Hi-tech Park, Shenzhen, 518057, China., Ricardo Ibarra M; Instituto de Nanociencia y Materiales de Aragón (INMA) & Laboratory of Advanced Microscopies (LMA), Universidad de Zaragoza, 50018, Zaragoza, Spain; Departamento de Física de la Materia Condensada, Facultad de Ciencias, Universidad de Zaragoza, 50009, Zaragoza, Spain., Yeung KL; Division of Environment and Sustainability, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China; Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China; HKUST Shenzhen Research Institute, Hi-tech Park, Shenzhen, 518057, China. Electronic address: kekyeung@ust.hk.
Zdroj: Environmental research [Environ Res] 2025 Oct 15; Vol. 283, pp. 122183. Date of Electronic Publication: 2025 Jun 18.
Způsob vydávání: Journal Article
Jazyk: English
Informace o časopise: Publisher: Elsevier Country of Publication: Netherlands NLM ID: 0147621 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1096-0953 (Electronic) Linking ISSN: 00139351 NLM ISO Abbreviation: Environ Res Subsets: MEDLINE
Imprint Name(s): Publication: <2000- > : Amsterdam : Elsevier
Original Publication: New York, Academic Press.
Výrazy ze slovníku MeSH: Phosphates*/chemistry , Water Pollutants, Chemical*/chemistry, Adsorption ; Thermodynamics ; Kinetics ; Hydroxides/chemistry ; Water Purification/methods ; Metal-Organic Frameworks/chemistry ; Ferrosoferric Oxide/chemistry
Abstrakt: Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Phosphorus contamination in water systems poses a significant environmental threat, necessitating the need for effective phosphate removal methods. A novel magnetic composite, magnetic Fe 3 O 4 @MIL-100(Fe)@Mg-Al layered double hydroxide (LDH), synthesized through a solid-state transformation of MIL-100(Fe) from Fe 3 O 4 followed by in-situ growth of Mg-Al LDH. This innovative hierarchical core/shell/shell structure leverages the magnetic properties of Fe 3 O 4 for easy separation, utilizes MIL-100(Fe) to grow and orient the LDH, and exploits the large ion exchange capacity of Mg-Al LDH nanosheets for efficient phosphate capture. Our experiments demonstrated rapid phosphate removal exceeding 95 % within 10 min, achieving a final concentration of 25.5 μg/L from an initial concentration of 1 mg/L. The adsorption kinetics conformed to a pseudo-second order model, and isothermal data fit the Langmuir model. Thermodynamic analysis indicated spontaneous and exothermic adsorption, with an activation energy of 15.76 kJ mol -1 . Enthalpy and entropy findings suggest a decrease in randomness during the adsorption process. Density Functional Theory (DFT) calculations revealed that phosphate ions interact strongly with Al sites in the LDH and Fe-O nodes in MIL-100(Fe). Phosphate recovery and sorbent regeneration are accomplished through a simple alkaline wash, which concentrates the recovered phosphate by 4.8 times. This study highlights the potential of Fe 3 O 4 @MIL-100(Fe)@Mg-Al LDH as a sustainable and efficient adsorbent for phosphate pollution mitigation, offering significant contributions to environmental protection and resource conservation.
(Copyright © 2025 Elsevier Inc. All rights reserved.)
Contributed Indexing: Keywords: Adsorption configuration; Adsorption kinetics; Fe(3)O(4)@MOF@LDH; Magnetic core/shell structure; Phosphate adsorption; Thermodynamic parameters
Substance Nomenclature: 0 (Phosphates)
0 (Water Pollutants, Chemical)
0 (Hydroxides)
0 (Metal-Organic Frameworks)
XM0M87F357 (Ferrosoferric Oxide)
Entry Date(s): Date Created: 20250620 Date Completed: 20250908 Latest Revision: 20250908
Update Code: 20250909
DOI: 10.1016/j.envres.2025.122183
PMID: 40541906
Databáze: MEDLINE
Popis
Abstrakt:Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.<br />Phosphorus contamination in water systems poses a significant environmental threat, necessitating the need for effective phosphate removal methods. A novel magnetic composite, magnetic Fe <subscript>3</subscript> O <subscript>4</subscript> @MIL-100(Fe)@Mg-Al layered double hydroxide (LDH), synthesized through a solid-state transformation of MIL-100(Fe) from Fe <subscript>3</subscript> O <subscript>4</subscript> followed by in-situ growth of Mg-Al LDH. This innovative hierarchical core/shell/shell structure leverages the magnetic properties of Fe <subscript>3</subscript> O <subscript>4</subscript> for easy separation, utilizes MIL-100(Fe) to grow and orient the LDH, and exploits the large ion exchange capacity of Mg-Al LDH nanosheets for efficient phosphate capture. Our experiments demonstrated rapid phosphate removal exceeding 95 % within 10 min, achieving a final concentration of 25.5 μg/L from an initial concentration of 1 mg/L. The adsorption kinetics conformed to a pseudo-second order model, and isothermal data fit the Langmuir model. Thermodynamic analysis indicated spontaneous and exothermic adsorption, with an activation energy of 15.76 kJ mol <sup>-1</sup> . Enthalpy and entropy findings suggest a decrease in randomness during the adsorption process. Density Functional Theory (DFT) calculations revealed that phosphate ions interact strongly with Al sites in the LDH and Fe-O nodes in MIL-100(Fe). Phosphate recovery and sorbent regeneration are accomplished through a simple alkaline wash, which concentrates the recovered phosphate by 4.8 times. This study highlights the potential of Fe <subscript>3</subscript> O <subscript>4</subscript> @MIL-100(Fe)@Mg-Al LDH as a sustainable and efficient adsorbent for phosphate pollution mitigation, offering significant contributions to environmental protection and resource conservation.<br /> (Copyright © 2025 Elsevier Inc. All rights reserved.)
ISSN:1096-0953
DOI:10.1016/j.envres.2025.122183