Calorimetry studies for interaction in solid/liquid interface between the modified cellulose and divalent cation

Filho, Edson Cavalcanti da Silva; Lima, Luciano Clécio Brandão; Sousa, Kaline S.; Fonseca, Maria G.; Pereira, Francisco A.R.

doi:10.1007/s10973-012-2868-3

Cited by 11 publications

(3 citation statements)

References 31 publications

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“…The studies reported in the literature about chemical modification of the cellulose surface by ethylenediamine showed this reaction occurs easily when cellulose is firstly chlorinated (halogenation reaction) and subsequently reacts with ethylenediamine. This intermediate step is used to increase the cellulose reactivity, and therefore, increase the amount of ethylenediamine incorporated on the cellulose [ 21 ]. However, cellulose halogenation, besides being an expensive reaction, from an economical perspective, it also promotes the formation of a toxic intermediate, and may generate co-products hazardous to the environment.…”

Section: Resultsmentioning

confidence: 99%

Direct Modification of Microcrystalline Cellulose with Ethylenediamine for Use as Adsorbent for Removal Amitriptyline Drug from Environment

Bezerra

Leal

Silva³

et al. 2017

Molecules

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Cellulose derivatives have been widely used as adsorbents for the removal of micropollutants such as drugs, dyes, and metals, due to their abundance, low cost and non-contaminating nature. In this context, several studies have been performed searching for new adsorbents (cellulose derivatives) efficient at contaminant removal from aqueous solutions. Thus, a new adsorbent was synthesized by chemical modification of cellulose with ethylenediamine in the absence of solvent and applied to the adsorption of amitriptyline (AMI) in aqueous solution. The modification reaction was confirmed by X-ray Diffraction (XRD), elemental analysis, Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetry/Differential Scanning Calorimeter (TG/DSC), solid state Nuclear Magnetic Resonance of 1H and 13C (1H-NMR and 13C-NMR). Moreover, the effectiveness of reaction was confirmed by computational calculations using Density Functional Theory (DFT) at level B3LYP/6-31G(d). This adsorption process was influenced by pH, time, concentration, temperature and did not show significant changes due to the ionic strength variation. Through these experiments, it was observed that the maximum adsorption capacity of AMI by CN polymer at 298 K, 300 min, and pH 7 was 87.66 ± 0.60 mg·g−1.

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Section: Resultsmentioning

confidence: 99%

Direct Modification of Microcrystalline Cellulose with Ethylenediamine for Use as Adsorbent for Removal Amitriptyline Drug from Environment

Bezerra

Leal

Silva³

et al. 2017

Molecules

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“…Calorimetry is a powerful tool which allows to directly measure the energy exchange occurring when two reagents are mixed in the measurement cell. This technique has been largely used to obtain thermodynamic data for metal complexation reactions occurring in aqueous or non-aqueous media [20][21][22][23][24][25][26][27][28][29], but much less examples of ITC applied to metal ion adsorption studies are present in the literature [30][31][32][33][34][35][36][37]. In many works, metal ion adsorption enthalpy (ΔHads) has been calculated by van't Hoff equation [38,39].…”

Section: In This Work Spion Functionalized With 3-mercaptopropionic mentioning

confidence: 99%

Thermodynamics of Hg2+ and Ag+ adsorption by 3-mercaptopropionic acid-functionalized superparamagnetic iron oxide nanoparticles

Lanas

Valiente

Tolazzi

et al. 2018

J Therm Anal Calorim

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Superparamagnetic iron nanoparticles (SPION) have been functionalized with 3mercaptopropionic acid (3-MPA), characterized and applied for the removal of Ag + , Hg 2+ and Pb 2+ metal ions from aqueous solutions by iron oxide (Fe3O4). The heavy metal adsorption has been investigated by means of ICP-OES and isothermal titration calorimetry. Experimental data ware better fitted by Langmuir rather than Freundlich isotherms and the thermodynamic parameters for the adsorption process of the metal ions on the functionalized SPION nanoparticles (SPION@3-MPA) were obtained. Isothermal titration calorimetry (ITC) is applied to monitor heavy metal adsorption on SPION@3-MPA: the process results to be exothermic for Hg 2+ , Ag + while it is weakly endothermic in the case of Pb 2+ and the adsorption enthalpies and entropies have been obtained. The values of the thermodynamic parameters suggest that the Ag + and Hg 2+ ions interact strongly with the thiol groups, while the Pb 2+ ions seem to be adsorbed by the material mostly via electrostatic interaction. When compared to other thiol-functionalized materials, the obtained SPION@3-MPA NP can be considered a competitive adsorbent for Ag + and Hg 2+ ions. The comparison between the ICP-OES adsorption rata and the enthalpy trend obtained by ITC supports shows that the latter technique can be a good tool for a fast testing of materials to be applied for heavy metal separation from solutions.

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“…Indeed, this technique was widely used by our group mainly to characterize chemical equilibria processes in aqueous or non-aqueous solutions [17,18,19,20,21,22,23,24,25,26]. Meanwhile, a few number of ITC applications in adsorption studies are found in the recent literature [27,28,29,30], being the enthalpy associated with desorption process usually calculated indirectly by van't Hoff equation [31,32]. Nevertheless, many studies revealed serious discrepancies between enthalpy values calculated from van't Hoff equation and obtained directly from ITC and, evidencing large uncertainties associated with the former method [33,34,35,36].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics of sorption of platinum on superparamagnetic nanoparticles functionalized with mercapto groups

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Lanas

Valiente

et al. 2018

J Therm Anal Calorim

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The adsorption of Pt(IV) by iron oxide (Fe O ) superparamagnetic nanoparticles (SPION) functionalized with 3-mercaptopropionic acid (3-MPA) is investigated by means of inductively coupled plasma optical emission spectrometry and isothermal titration calorimetry. Experimental ICP data are better fitted by Langmuir rather than Freundlich isotherms. The whole thermodynamic parameters and maximum loading capacity for the adsorption process of Pt(IV) on the functionalized SPION nanoparticles

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Calorimetry studies for interaction in solid/liquid interface between the modified cellulose and divalent cation

Cited by 11 publications

References 31 publications

Direct Modification of Microcrystalline Cellulose with Ethylenediamine for Use as Adsorbent for Removal Amitriptyline Drug from Environment

Direct Modification of Microcrystalline Cellulose with Ethylenediamine for Use as Adsorbent for Removal Amitriptyline Drug from Environment

Thermodynamics of Hg2+ and Ag+ adsorption by 3-mercaptopropionic acid-functionalized superparamagnetic iron oxide nanoparticles

Thermodynamics of sorption of platinum on superparamagnetic nanoparticles functionalized with mercapto groups

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