Abstract
This study evaluates the performance of aminated multi-walled carbon nanotubes (AM-MWCNTs) integrated with zerovalent iron nanoparticles (ZVI) synthesized using cashew leaf (Anacardium occidentale) extract (AM-MWCNTs@ZVI) for the removal of Congo Red (CR) and Methylene Blue (MB) dyes from textile industrial wastewater. The nanocomposite was characterized using FTIR, XRD, BET, HRSEM, and HRTEM analyses, confirming its functional groups, crystalline structure, and enhanced surface area of 1050.4 m2/g. The ecological risk degree of the textile pollutants was assessed to determine the percentage concentrations of crystal violet, Congo red, methyl orange, methylene blue and rhodamine B. Batch adsorption experiments identified optimal parameters as pH 4 for CR and pH 8 for MB, contact time of 60 min, adsorbent dosage of 40 mg/L, and temperature of 40 °C. The Temkin isotherm model best described the adsorption process. Particularly, the maximum adsorption capacities of 450 mg/g and 422 mg/g were evaluated for CR and MB, respectively. Pseudo-second-order kinetics indicated chemisorption as the dominant mechanism. The nanocomposite demonstrated reusability with 88 % and 85 % removal efficiency for CR and MB, respectively, after six cycles. These results highlight AM-MWCNTs@ZVI as an effective, recyclable adsorbent for industrial wastewater treatment.
Recommended Citation
T. C. Egbosiuba and C. Chukwuemeka and J. C. Umeuzuegbu and N. C. Mmonwuba and U. Ewuzie and M. U. Okoronkwo and V. C. Anadebe and S. Mustapha and A. S. Abdulkareem and J. O. Tijani and A. Patel and V. K. Yadav, "Performance Evaluation of Aminated Multi-walled Carbon Nanotubes Incorporated with Green Synthesized Iron Nanoparticles for Toxic Dyes Sequestration from Textile Wastewater," Water Resources and Industry, vol. 33, article no. 100291, Elsevier, Jun 2025.
The definitive version is available at https://doi.org/10.1016/j.wri.2025.100291
Department(s)
Chemical and Biochemical Engineering
Publication Status
Open Access
Keywords and Phrases
Adsorption; Amination; Carbon nanotubes; Congo red and methylene blue; Reusability; Zerovalent iron nanoparticles
International Standard Serial Number (ISSN)
2212-3717
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2025 Elsevier, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution 4.0 License.
Publication Date
01 Jun 2025
Included in
Chemical Engineering Commons, Civil and Environmental Engineering Commons, Materials Chemistry Commons, Materials Science and Engineering Commons
