000161893 001__ 161893
000161893 005__ 20251009133840.0
000161893 0247_ $$2doi$$a10.1016/j.envres.2025.122183
000161893 0248_ $$2sideral$$a144540
000161893 037__ $$aART-2025-144540
000161893 041__ $$aeng
000161893 100__ $$aLiu, Zhang
000161893 245__ $$aEfficient adsorption of phosphate on magnetic Fe3O4@MOF@LDH superstructures: Kinetics, thermodynamics, and mechanisms
000161893 260__ $$c2025
000161893 5060_ $$aAccess copy available to the general public$$fUnrestricted
000161893 5203_ $$aPhosphorus contamination in water systems poses a significant environmental threat, necessitating the need for effective phosphate removal methods. A novel magnetic composite, magnetic Fe3O4@MIL-100(Fe)@Mg-Al layered double hydroxide (LDH), synthesized through a solid-state transformation of MIL-100(Fe) from Fe3O4 followed by in-situ growth of Mg-Al LDH. This innovative hierarchical core/shell/shell structure leverages the magnetic properties of Fe3O4 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 Fe3O4@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
000161893 536__ $$9info:eu-repo/grantAgreement/ES/MCIU/RTC-2017-6620-1$$9info:eu-repo/grantAgreement/ES/MICIU/PID2019-106947RB-C21
000161893 540__ $$9info:eu-repo/semantics/embargoedAccess$$aby-nc-nd$$uhttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
000161893 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000161893 700__ $$aHan, Wei
000161893 700__ $$0(orcid)0000-0003-0602-492X$$aMarquina, C.
000161893 700__ $$aKwan, Joseph K.C.
000161893 700__ $$0(orcid)0000-0003-0681-8260$$aIbarra, Manuel Ricardo$$uUniversidad de Zaragoza
000161893 700__ $$aYeung, King Lun
000161893 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada
000161893 773__ $$g283 (2025), 122183 [11 pp.]$$pEnviron. res.$$tEnvironmental Research$$x0013-9351
000161893 8564_ $$s1671647$$uhttps://zaguan.unizar.es/record/161893/files/texto_completo.pdf$$yPostprint$$zinfo:eu-repo/date/embargoEnd/2027-10-15
000161893 8564_ $$s1097651$$uhttps://zaguan.unizar.es/record/161893/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint$$zinfo:eu-repo/date/embargoEnd/2027-10-15
000161893 909CO $$ooai:zaguan.unizar.es:161893$$particulos$$pdriver
000161893 951__ $$a2025-10-09-13:25:51
000161893 980__ $$aARTICLE