Kinetic and thermodynamic assessment on isoniazid/montmorillonite adsorption

Carazo, E.; Borrego-Sánchez, Ana; Sánchez-Espejo, Rita; García‐Villén, Fátima; Cerezo, Pilar; Aguzzi, Carola; Viseras, César

doi:10.1016/j.clay.2018.08.009

Cited by 40 publications

(18 citation statements)

References 40 publications

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“…The Freundlich model described the formation of multilayers by adsorbate molecules on the adsorbent surface because of different affinities for various active sites on adsorbent surface [45]. The equation was expressed as following: log qe=log k+1nlog Ce where k (mL/mg) and n are the Freundlich constants.…”

Section: Resultsmentioning

confidence: 99%

Preparation of Magnetic Fe3O4/MIL-88A Nanocomposite and Its Adsorption Properties for Bromophenol Blue Dye in Aqueous Solution

et al. 2019

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Metal-organic frameworks (MOFs) are considered as good materials for the adsorption of many environmental pollutants. In this study, magnetic Fe3O4/MIL-88A composite was prepared by modification of MIL-88A with magnetic nanoparticles using the coprecipitation method. The structures and magnetic property of magnetic Fe3O4/MIL-88A composite were characterized and the adsorption behavior and mechanism for Bromophenol Blue (BPB) were evaluated. The results showed that magnetic Fe3O4/MIL-88A composite maintained a hexagonal rod-like structure and has good magnetic responsibility for magnetic separation (the maximum saturation magnetization was 49.8 emu/g). Moreover, the maximum adsorption amount of Fe3O4/MIL-88A composite for BPB was 167.2 mg/g and could maintain 94% of the initial adsorption amount after five cycles. The pseudo-second order kinetics and Langmuir isotherm models mostly fitted to the adsorption for BPB suggesting that chemisorption is the rate-limiting step for this monomolecular-layer adsorption. The adsorption capacity for another eight dyes (Bromocresol Green, Brilliant Green, Brilliant Crocein, Amaranth, Fuchsin Basic, Safranine T, Malachite Green and Methyl Red) were also conducted and the magnetic Fe3O4/MIL-88A composite showed good adsorption for dyes with sulfonyl groups. In conclusion, magnetic Fe3O4/MIL-88A composite could be a promising adsorbent and shows great potential for the removal of anionic dyes containing sulfonyl groups.

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Section: Resultsmentioning

confidence: 99%

Preparation of Magnetic Fe3O4/MIL-88A Nanocomposite and Its Adsorption Properties for Bromophenol Blue Dye in Aqueous Solution

et al. 2019

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“…None of the prodrugs (WSCP1-3) showed mass losses before 200 • C (Figure 4b), though DSC analysis showed endothermic events for three of them before this temperature (Figure 4c), thus indicating thermal transitions. In particular, the lower endothermic peaks at 125 and 53 • C observed in WSCP1 and WSCP3, respectively, are associated with solid-solid phase transition, indicating the possibility of polymorphism [46][47][48]. The peaks at 166 • C in WSCP1, 165 • C in WSCP2, and 81 • C in WSCP3 with enthalpy (∆H) of −47.17, −14.71, and −34.63 Jg −1 , respectively, are due to melting transition of drug crystals.…”

Section: Tga and Dscmentioning

confidence: 97%

Carvacrol Prodrugs with Antimicrobial Activity Loaded on Clay Nanocomposites

et al. 2020

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Background: Carvacrol, an essential oil with antimicrobial activity against a wide range of pathogens, and its water soluble carvacrol prodrugs (WSCP1-3) were intercalated into montmorillonite (VHS) interlayers to improve their stability in physiological media and promote their absorption in the intestine. Methods: Intercalation of prodrugs by cation exchange with montmorillonite interlayer counterions was verified by X-ray powder diffraction and confirmed by Fourier transform infrared spectroscopy and thermal analysis. Results: In vitro release studies demonstrated that montmorillonite successfully controlled the release of the adsorbed prodrugs and promoted their bioactivation only in the intestinal tract where carvacrol could develop its maximum antimicrobial activity. The amount of WSCP1, WSCP2, and WSCP3 released from VHS were 38%, 54%, and 45% at acid pH in 120 min, and 65%, 78%, and 44% at pH 6.8 in 240 min, respectively. Conclusions: The resultant hybrids successfully controlled conversion of the prodrugs to carvacrol, avoiding premature degradation of the drug.

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“…Among all these techniques, adsorption is considered the most effective and preferred economical technique that has widely been used for wastewater treatment [9]. Numerous kinds of adsorbent materials have been commonly utilized for the removal of dyes effluents from wastewater, for example, activated carbon [10][11][12][13], metal oxides [14][15][16], clays [17][18][19][20]. Nowadays, great attention has been focused on discovering cost-effective and natural available S. M. AL-MAHMOUD adsorbents that can be used effectively for the treatment of wastewater.…”

Section: Introductionmentioning

confidence: 99%

Kinetic, Isothermal and Thermodynamic Investigations for the Use of Pumpkin Seed Husks as low-Cost Biosorbent of Solochrome Cyanine R from Aqueous Solutions

Al-Mahmoud

2020

Egypt. J. Chem.

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P UMPKIN seed husks were used in this research as effective-cost material for the adsorption of Solochrome cyanine R from aqueous solutions. A good removal ability of Pumpkin seed husks was noticed during this study, and the optimal adsorption conditions were found to be 120 min. equilibrium contact time, 0.2 g biosorbent dosage, and 100 mg/L initial dye concentration. The kinetic investigation shows that applying the pseudo-second order model gives a better fit for the adsorption with the higher correlation coefficient. The isothermal investigation shows an excellent fit of data using the Langmuir model, and also predict that the removal process is favorable. The adsorption data at different temperatures were evaluated in order to obtain the thermodynamic parameters. The positive values of ΔH° and ΔS° indicate the endothermic and randomness of the adsorption process. Moreover, the negative values of ΔG° clarify that the adsorption process is spontaneous and more preferable at higher temperatures. Pumpkin seed husks as a low-cost biosorbent exhibit a great potential for the adsorption of Solochrome cyanine R from aqueous solutions.

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Kinetic and thermodynamic assessment on isoniazid/montmorillonite adsorption

Cited by 40 publications

References 40 publications

Preparation of Magnetic Fe3O4/MIL-88A Nanocomposite and Its Adsorption Properties for Bromophenol Blue Dye in Aqueous Solution

Preparation of Magnetic Fe3O4/MIL-88A Nanocomposite and Its Adsorption Properties for Bromophenol Blue Dye in Aqueous Solution

Carvacrol Prodrugs with Antimicrobial Activity Loaded on Clay Nanocomposites

Kinetic, Isothermal and Thermodynamic Investigations for the Use of Pumpkin Seed Husks as low-Cost Biosorbent of Solochrome Cyanine R from Aqueous Solutions

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