Efficient recovery of phosphate by Fe3O4/La-MOF: An insight of adsorption performance and mechanism from electrochemical properties

He, Qinqin; Zhao, Hongjun; Teng, Zedong; Wang, Yin; Sun, Weiqing; Guo, Yali; Ji, Xiaonan; Hu, Wei; Lam, Su Shiung; Li, Min

doi:10.1016/j.seppur.2023.123529

Cited by 33 publications

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“…The pseudo-second-order rate constant (K 2 ) value was relatively low due to the long time (300 min) to reach an equilibrium. The well-matched PSO model with the experimental values can be correlated to a chemical adsorption process . Mostly, the ligand exchanged process is related to the chemical adsorption due to the phosphate binding .…”

Section: Resultsmentioning

confidence: 99%

“…The well-matched PSO model with the experimental values can be correlated to a chemical adsorption process. 45 Mostly, the ligand exchanged process is related to the chemical adsorption due to the phosphate binding. 46 In addition, the experimental isotherm data fit properly into the Freundlich model, which is related to multilayer adsorption on a heterogeneous surface.…”

Section: Adsorption Studiesmentioning

confidence: 99%

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Ho(III)-Based Metal–Organic Framework for Water Pollution Treatment: Insights into Sensitive Phosphate Removal and Sensing in Aqueous Solution

Obeso,

López-Cervantes,

Flores

et al. 2024

ACS Sustainable Resour. Manage.

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The existence of phosphate in aquatic ecosystems generates eutrophication. As a novel alternative to tackling this problem, this study reported a Ho(III)-based metal−organic framework (MOF) for removing and detecting phosphate molecules. Ho-bpdc MOF shows an outstanding maximum adsorption capacity of 311.9 mg g −1 , with high pH (4−10) stability. PSO and Freundlich's models reveal that the chemical interaction between the phosphate molecules and Ho-bpdc plays the main role during the removal process. The combination of FTIR and XPS characterizations confirmed the possible interaction mechanism involving a ligand-exchanged process. Thus, the formation of Ho−O−P sites was determined due to the relatively strong base character for the phosphate ion. Moreover, Ho-bpdc exhibited outstanding fluorescence properties for the sensing of phosphate molecules. The fluorescence experiments showed a LOD of 2.57 ppm, based on the solidstate emission spectra of Ho-bpdc at different phosphate concentrations (5−100 ppm). Ho-bpdc exhibited a characteristic turn-on effect after the phosphate interaction due to the increments of the electronic π* → π transition of ligands. This work demonstrated the remarkable properties of Ho-bpdc in the adsorption and sensing of phosphate.

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Section: Resultsmentioning

confidence: 99%

Section: Adsorption Studiesmentioning

confidence: 99%