Adsorption of neutral red dye by chitosan and activated carbon composite films

Freitas, Fabiana Paiva de; Carvalho, Ana Márcia Macêdo Ladeira; Carneiro, Angélica de Cássia Oliveira; Magalhães, Mateus Alves de; Xisto, Mariana Fonseca; Canal, Wagner Davel

doi:10.1016/j.heliyon.2021.e07629

Cited by 27 publications

(9 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The decrease in pore size and volume of Ag-composites clearly suggests the adsorption of Ag NCs on support materials. CE, CH, and NA showed pore sizes of 10.4 nm, 2.26 nm, and 10.9 nm, respectively, as mentioned in the literature. Hence, the pore sizes of CE, CH, and NA obtained in the present work are in well agreement with the reported values.…”

Section: Resultssupporting

confidence: 78%

Functionalized Silver Nanocubes for the Detection of Hazardous Analytes through Surface-Enhanced Raman Scattering: Experimental and Computational Studies

Basavaraja,

Bantwal,

Tripathi

et al. 2023

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

The functionalization of nanomaterials offers a significant impact on environmental protection. Three silver composites, silver nanocubes (Ag NCs) with cellulose (Ag-CE), Ag NCs with chitosan (Ag-CH), and Ag NCs with neutral alumina (Ag-NA), were synthesized with the incorporation of a very low concentration of Ag NCs. The synthesized Ag-composites were used for the detection of hazardous analytes, 4-mercaptobenzoic acid (4-MBA), rhodamine 6G (R6G), and methylene blue (MB), via a highly sensitive surface-enhanced Raman scattering (SERS) technique. The enhancement factors for the detection of MB were found to be 1.2 × 106, 1.4 × 106, and 3.7 × 105 using Ag-CE, Ag-CH, and Ag-NA, respectively. Limits of detection of 1 nM, 100 pM, and 100 μM were achieved for MB using Ag-CE, Ag-CH, and Ag-NA, respectively. The Ag-CH composite achieved excellent sensitivity and enhancement for the detection of MB compared to the other two Ag-composites. The order of detection efficiency of MB using Ag-composites was measured theoretically and follows the order Ag-CH > Ag-CE > Ag-NA. A real-time filtration unit showed excellent efficiency for MB removal. The present method can be employed in commercial filtration processes for the benefit of the environment and sustainable development.

show abstract

Section: Resultssupporting

confidence: 78%

Functionalized Silver Nanocubes for the Detection of Hazardous Analytes through Surface-Enhanced Raman Scattering: Experimental and Computational Studies

Basavaraja,

Bantwal,

Tripathi

et al. 2023

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…The bands at 1406 cm −1 and 1035 cm −1 are assigned to the angular deformation of C-H of the CH 3 group and to C-O binding and stretching, respectively. These results are close to those recorded for activated carbon/chitosan composites investigated elsewhere [33]. By comparing the two spectra (before and after adsorption), it was noticed that there was no change in the peaks.…”

Section: Ftir Analysissupporting

confidence: 89%

Anionic Dye Removal Using a Date Palm Seed-Derived Activated Carbon/Chitosan Polymer Microbead Biocomposite

et al. 2022

View full text Add to dashboard Cite

The discharge of textile wastewater into aquatic streams is considered a major challenge due to its effect on the water ecosystem. Direct blue 78 (DB78) dye has a complex structure. Therefore, it is difficult to separate it from industrial wastewater. In this study, carbon obtained from the pyrolysis of mixed palm seeds under different temperatures (400 °C and 1000 °C) was activated by a thermochemical method by using microwave radiation and an HCl solution in order to improve its adsorption characteristics. The generated activated carbon was used to synthesize a novel activated carbon/chitosan microbead (ACMB) for dye removal from textile wastewater. The obtained activated carbon (AC) was characterized by a physicochemical analysis that included, namely, particle size, zeta potential, SEM, EDX, and FTIR analyses. A series of batch experiments were conducted in terms of the ACMB dose, contact time, pH, and activated carbon/chitosan ratios in synthetic microbeads for enhancing the adsorption capacity. A remarkable improvement in the surface roughness was observed using SEM analysis. The particle surface was transformed from a slick surface with a minor-pore structure to a rough surface with major-pore structure. The zeta potential analysis indicated a higher improvement in the carbon surface charge, from −35 mv (before activation) to +20 mv (after activation). The adsorption tests showed that the dye-removal efficiency increased with the increasing adsorbent concentration. The maximum removal efficiencies were 97.8% and 98.4% using 3 and 4 g/L of AC400°C MB-0.3:1 and AC1000°C MB-0.3:1, respectively, with initial dye concentrations of 40 mg/L under acidic conditions (pH = 4–5), and an optimal mixing time of 50 min. The equilibrium studies for AC400°C MB-0.3:1 and AC1000°C MB-0.3:1 showed that the equilibrium data best fitted to the Langmuir isothermal model with R2 = 0.99. These results reveal that activated carbon/chitosan microbeads are an effective adsorbent for the removal of direct blue 78 dye and provide a new platform for dye removal.

show abstract

“…The MDLZ adsorbent exhibited a considerably greater adsorption capacity ( q m ) for CV (39.37 mg g −1 ), CR (239.81 mg g −1 ), and NR (321.54 mg g −1 ) at 25 °C when compared to other adsorbents listed in Table 2. 36–60…”

Section: Resultsmentioning

confidence: 99%

Magnetized cubic zinc MOFs for efficient removal of hazardous cationic and anionic dyes in aqueous solutions

Abd El-Mouhsen,

El-Sayed,

El-Feky

et al. 2024

RSC Adv.

View full text Add to dashboard Cite

show abstract

Adsorption of neutral red dye by chitosan and activated carbon composite films

Cited by 27 publications

References 34 publications

Functionalized Silver Nanocubes for the Detection of Hazardous Analytes through Surface-Enhanced Raman Scattering: Experimental and Computational Studies

Functionalized Silver Nanocubes for the Detection of Hazardous Analytes through Surface-Enhanced Raman Scattering: Experimental and Computational Studies

Anionic Dye Removal Using a Date Palm Seed-Derived Activated Carbon/Chitosan Polymer Microbead Biocomposite

Magnetized cubic zinc MOFs for efficient removal of hazardous cationic and anionic dyes in aqueous solutions

Contact Info

Product

Resources

About