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

Abstract

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.

Phosphorylated cellulose/electrospun chitosan nanofibers media for removal of heavy metals from aqueous solutions

“…Thermal analysis of PCF substrate and two-layer media samples by DSC were carried out to study their thermal characteristics (see Figure 5). The PCF substrate curve begins its thermal event at 58 C (onset temperature), with an endothermic peak or melting temperature at 108 C and an endset temperature at 150 C, which is in accordance with Bezerra et al 33 When the temperature rises, the material shows an exothermic peak with a starting temperature of 235 C, a peak at 248 C and a final temperature of 253 C. This peak can be characterized as a cross-linking event resulting from chemical reactions between molecules binding them together to form a three-dimensional network. For the adsorbent media, the onset temperature starts at 49 C, a small endothermic peak is appearing at 53 C, which is a typical pretransition, or glass-transition temperature point, and the melting temperature occurs at 93 C. The endset temperature was recorded at 135 C. It is also possible to observe the exothermic peak event at 343 C. The endothermic peak corresponds to the fusion transition or a first order transition due to the particle size distribution of the crystalline regions present in the macromolecules.…”

Morphological, Release and Antibacterial Performances of Amoxicillin-Loaded Cellulose Aerogels

“…The peak at 2900 cm −1 is due to the existence of CH 2 groups [ 25 ]. An absorption band at 1649 cm −1 is assigned to the bending vibrations of the primary and secondary O–H groups of cellulose [ 26 ]. Besides, the peaks at 1163, and 1061 cm −1 correspond to the C–O asymmetric bridge stretching and the C–O–C pyranose ring skeletal vibration, respectively [ 27 ].…”

Reduced Graphene Oxide/TEMPO-Nanocellulose Nanohybrid-Based Electrochemical Biosensor for the Determination ofMycobacterium tuberculosis

“…Moreover, double peaks also appeared at 2890 cm −1 and 3354 cm −1 , corresponding to the -CH 2 stretching vibration and N-H stretch of primary amine groups that originated from the ethylenediamine [38,44]. Furthermore, Figure 2(d) shows the FTIR spectra of NH 2 -rGO/TNCC with a small peak observed at 1690 cm -1 which is assigned to the C=O stretching vibration of -NHCO-(amide I) [45]. It can be seen that the peaks at 1630 cm -1 was less visible compared to FTIR spectra in Figure 2(b) due to consumption of -COOH groups during amidation reaction between NH 2 -GO and TNCC.…”