Adsorption of neutral red onto MIL-100(Fe) from solution: characterization, equilibrium, kinetics, thermodynamics and process design

Chen, Shanshan; Wen, Kejun; Zhang, Xiaoting; Zhang, Ruize; Han, Runping

doi:10.5004/dwt.2020.24923

Cited by 12 publications

(5 citation statements)

References 46 publications

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“…The absorption band of C-H bending vibration (~746 cm -1 ) was also identified and corresponded to the aromatic ring of dicarboxylic benzene [49, 52, 53]. Finally, the spectra of these iron-based MOFs also contained the Fe-O stretching vibration at ~550 cm -1 , which also agreed with the results of other studies that have reported the synthesis of these MOFs [35, 39, 40, 43, 44, 52, 53].…”

Section: Resultssupporting

confidence: 87%

“…Therefore, this descriptor provides the electron density response when a unit of positive charge approaches. showed the characteristic diffraction peak at ~11.1 °2θ, thus denoting the formation of a pure phase [35,36]. This result was consistent with those reported by Chen et al [ After the adsorption of pharmaceuticals, the X-ray diffraction patterns displayed some changes.…”

Section: Thermodynamics and Modeling Of The Adsorption Ofsupporting

confidence: 91%

“…X-ray diffractogram of MIL-100-Fe showed the characteristic diffraction peak at ~11.1° 2 θ , thus denoting the formation of a pure phase [35, 36]. This result was consistent with those reported by Chen et al [35], Forghani et al [36], Pil-Joong et al [37], Zhang et al [38], Fan et al [39], Mahmoodi et al [40], Nehra et al [41], Shah et al [42], Li et al [43], Chaturvedi et al [44], Chen et al [45], and Chávez et al [46]. After the adsorption of the different pharmaceutical molecules, the MOF crystalline structure was stable but the intensity of the diffraction peaks decreased.…”

Section: Resultsmentioning

confidence: 99%

“…The results of X-ray diffraction of the synthesized MIL-100-Fe and MIL-101-Fe MOFs are reported in Figure 1. X-ray diffractogram of MIL-100-Fe showed the characteristic diffraction peak at ~11.1° 2 θ , thus denoting the formation of a pure phase [35, 36]. This result was consistent with those reported by Chen et al [35], Forghani et al [36], Pil-Joong et al [37], Zhang et al [38], Fan et al [39], Mahmoodi et al [40], Nehra et al [41], Shah et al [42], Li et al [43], Chaturvedi et al [44], Chen et al [45], and Chávez et al [46].…”

Section: Resultsmentioning

confidence: 99%

“…FTIR spectra of both MOFs are reported in Figure 2. They showed a broad absorption band at 3600–3000 cm -1 that was attributed to the stretching vibration of the O-H group [35, 36, 40, 41, 43–45, 52, 54, 55]. Iron-based MOFs showed an absorption band at ~1640 cm -1 related to the C=O stretching vibration due to carboxyl groups [24, 36, 40, 41, 44, 46, 53, 56].…”

Section: Resultsmentioning

confidence: 99%

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Physicochemical Modeling of the Adsorption of Pharmaceuticals on MIL-100-Fe and MIL-101-Fe MOFs

Quintero-Álvarez

Rojas-Mayorga

Mendoza-Castillo

et al. 2022

Adsorption Science & Technology

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The adsorption of naproxen (NAP), diclofenac (DFC), and acetaminophen (APAP) molecules from aqueous solutions using MIL-100-Fe and MIL-101-Fe metal organic frameworks (MOFs) has been analyzed and modeled. Adsorption isotherms of these pharmaceuticals were experimentally quantified at 30 and 40°C and pH 7. Textural parameters and surface chemistry of these MOFs were analyzed, and results were utilized to explain the pharmaceutical adsorption mechanism. Density Functional Theory (DFT) calculations were performed to understand the reactivity of pharmaceutical molecules, and a statistical physics model was employed to calculate the main physicochemical parameters related to the adsorption mechanism. Results showed that the adsorption of these pharmaceuticals on MOFs was multimolecular and exothermic. Both MOFs displayed the highest adsorption capacities, up to 2.19 and 1.71 mmol/g, for NAP and DFC molecules, respectively. MIL-101-Fe showed better pharmaceutical adsorption properties than MIL-100-Fe due to its highest content of Fe-O clusters and mesopore volume. Adsorption mechanism of these organic molecules could involve hydrogen bond, van der Waals forces, and electrostatic interactions with MOF surfaces. In particular, MIL-101-Fe MOF is a promising material to prepare composites with competitive adsorption capacities for facing the water pollution caused by pharmaceutical compounds.

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