Adsorptive Materials Based on Cellulose: Preparation, Characterization and Application for Copper Ions Retention

Nica, Iulia; Zaharia, Carmen; Baron, Raluca Ioana; Coseri, Sergiu; Șuteu, Daniela

doi:10.35812/cellulosechemtechnol.2020.54.58

Cited by 9 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The preparation and the physical-chemical characterization of the hydrogel used as a (bio)adsorbent in this study was performed according to the method and protocol described in previous papers [ 32 , 33 , 34 ], meaning in two stages: (i) the synthesis of 2,3,6-tricarboxycellulose by oxidation in the presence of the TEMPO/NaBr/NaOCl system; and (ii) the proposed stage of hydrogel synthesis, by mixing the homogeneous solution of PVA with the 2,3,6-tricarboxycellulose solution in different ratios ( Figure 1 ). The method continued with three freezing-thawing cycles applied to the composites of PVA-V mixture and pure aqueous PVA solution in order to obtain the physical networks.…”

Section: Methodsmentioning

confidence: 99%

“…For the characterization of the prepared biomaterial, in order to highlight the internal structure and the functional groups responsible for the adsorbent properties, the study of the degree of swelling was performed by using physico-chemical instrumental analysis methods, i.e., Scanning Electron Microscopy (SEM) and Fourier–Transform Infrared Spectroscopy (FTIR), and are described in other authors’ reports [ 32 , 33 , 34 ]. It must be mentioned that at a very low pH (1.5–2.0), the prepared hybrid hydrogel stability was good, and the swelling degree had the lowest value related to the maximal swelling degree shown at a pH of around 6.5–7.5 [ 35 ].…”

Section: Methodsmentioning

confidence: 99%

“…The method continued with three freezing-thawing cycles applied to the composites of PVA-V mixture and pure aqueous PVA solution in order to obtain the physical networks. Notably, after each freezing cycle of the samples, it was provided the operational conditions for a slow thawing by keeping them at 4 • C, which ensures the formation of a porous structure [23,32,33]. General synthesis scheme of the hybrid hydrogel based on PVA and 2,3,6tricarboxycellulose.…”

Section: Preparation and Physico-chemical Characterization Of Hybrid Hydrogelmentioning

confidence: 99%

See 2 more Smart Citations

Hydrogel Based on Tricarboxi-Cellulose and Poly(Vinyl Alcohol) Used as Biosorbent for Cobalt Ions Retention

2021

Self Cite

View full text Add to dashboard Cite

A biomaterial based on poly(vinyl alcohol) reticulated with tricarboxi-cellulose obtained by TEMPO oxidation (OxC25) was used as a new biosorbent for Co(II) ions retention from aqueous solutions. The biosorption process of Co(II) ions was studied while mainly considering the operational factors that can influence it (i.e., biosorbent concentration, pH of the aqueous media, temperature and contact time of the phases). The maximum adsorption capacity was 181.82 mg/g, with the biosorption well fitted by the Langmuir model. The kinetic modeling of the biosorption process was based on certain models: Lagergreen (pseudo first order model), Ho (pseudo second order model), Elovich (heterogeneous biosorbent model), Webber–Morris (intraparticle diffusion model) and McKay (film diffusion model). The corresponding kinetic model suggests that this biosorption process followed a pseudo-second order kinetic model and was developed in two controlled steps beginning with film diffusion and followed by intraparticles diffusion.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Preparation and Physico-chemical Characterization Of Hybrid Hydrogelmentioning

confidence: 99%

See 1 more Smart Citation

Hydrogel Based on Tricarboxi-Cellulose and Poly(Vinyl Alcohol) Used as Biosorbent for Cobalt Ions Retention

2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Although it has poor mechanical strength, several elements that could increase it have been explored. Research has focused on specific natural polymers (cellulose and pullulan) in various concentrations, in the form of oxidized C6 derivatives, as important multifunctional components that could serve as crosslinking agents as well as agents for enhancing the hardening and stiffness properties of hybrid PVA hydrogels [ 52 , 53 , 60 , 61 , 62 , 63 ]. These biosorbents derived from natural resources can also be employed to successfully retain some heavy metal species from various aqueous systems.…”

Section: Introductionmentioning

confidence: 99%

Biosorbent Based on Poly(vinyl alcohol)–Tricarboxi-Cellulose Designed to Retain Organic Dyes from Aqueous Media

et al. 2023

Self Cite

View full text Add to dashboard Cite

Methylene Blue, a cationic dye, was retained from aqueous solutions using a novel biosorbent made of poly(vinyl alcohol) reticulated with tricarboxi-cellulose produced via TEMPO oxidation (OxC25). The study of the Methylene Blue biosorption process was performed with an emphasis on operational parameters that may have an impact on it (such as biosorbent concentration, pH of the aqueous media, and temperature). The current study focused on three areas: (i) the physic-chemical characterization of the biosorbent (scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX)); (ii) biosorption data modeling to determine the quantitative characteristic parameters employing three equilibrium isotherms (Langmuir, Freundlich, and Dubinin–Radushkevich—DR); and (iii) the study of temperature influence. The results of the study showed that the Langmuir model provided a good fit for the experimental data of biosorption, realizing a maximum capacity of 806.45 mg/g at 20 °C. The free energy of biosorption (E) evaluated by the DR equation was in the range of 6.48–10.86 KJ/mol. The values of the thermodynamic parameters indicated an endothermic process because the free Gibbs energy ranged from −9.286 KJ/mol to −2.208 KJ/mol and the enthalpy was approximately −71.686 KJ/mol. The results obtained encourage and motivate the further study of this biosorption process by focusing on its kinetic aspects, establishing the biosorption’s controlled steps, identifying the mechanism responsible for the retention of textile dyes presented in moderate concentration in aqueous media, and studying the biosorption process in a dynamic regime with a view to applying it to real systems.

show abstract

“…Its ether and ester derivatives have become widely used in a variety of uses as a compromise measure. Oxidation products, in addition to cellulose esters and ethers, can serve as highly valuable intermediates in a multitude of scenarios where cellulose itself cannot be employed [ 21 , 22 , 23 , 24 , 25 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Antibacterial and Antifungal Silver Nanoparticles with Tunable Size Embedded in Various Cellulose-Based Matrices

Biliuță¹,

Bostănaru-Iliescu

Mareș

et al. 2022

Molecules

Self Cite

View full text Add to dashboard Cite

The aim of this study was to synthesize silver nanoparticles (AgNPs) using cellulose derivatives and to evaluate their antimicrobial potential. As effective reducing and stabilizing agents for AgNPs, cellulose derivatives, such as hydroxypropyl cellulose (HPC), methylcellulose (MC), ethylcellulose (EC), and cellulose acetate (CA), were used. Their ability to reduce silver ions as well as the size of the resulting AgNPs were compared. The formation and stability of the reduced AgNPs in the solution were monitored using UV-Vis analysis. The size, morphology, and charge of the AgNPs were evaluated. We found that, when using cellulosic derivatives, AgNPs with sizes ranging from 17 to 89 nm and different stabilities were obtained. The parameters, such as size and ζ potential indicate the stability of AgNPs, with AgNPs-CA and AgNPs-HPC being considered more stable than AgNPs-EC and AgNPs-MC since they show higher ζ potential values. In addition, the AgNPs showed antimicrobial activity against all reference strains and clinical isolates. MIC values between 0.0312 and 0.125 mM had a bactericidal effect on both Gram-positive and Gram-negative bacteria. The fungicidal effect was obtained at a MIC value of 0.125 mM. These results may provide rational support in the design of medical gauze products, including gauze pads, rolls, and sponges.

show abstract

Adsorptive Materials Based on Cellulose: Preparation, Characterization and Application for Copper Ions Retention

Cited by 9 publications

References 0 publications

Hydrogel Based on Tricarboxi-Cellulose and Poly(Vinyl Alcohol) Used as Biosorbent for Cobalt Ions Retention

Hydrogel Based on Tricarboxi-Cellulose and Poly(Vinyl Alcohol) Used as Biosorbent for Cobalt Ions Retention

Biosorbent Based on Poly(vinyl alcohol)–Tricarboxi-Cellulose Designed to Retain Organic Dyes from Aqueous Media

Antibacterial and Antifungal Silver Nanoparticles with Tunable Size Embedded in Various Cellulose-Based Matrices

Contact Info

Product

Resources

About