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Preparation and Characterization of Carbon Nanotube /Zero Valent Iron Nanocomposite and its Efficiency in Removing Textile Industry Dyes from Aqueous Solutions

SSRN, ISSN: 1556-5068
2023
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Article Description

AbstractsFirst, in this study, zero-valent iron nanoparticles (nZVI) have been modified by multi-walled carbon nanotubes (MWCNT). Then, the physicochemical features of the nZVI@MWCNT nanocomposite have been assessed by XRD, FTIR, FESEM, SEM-EDS and BET analyses. The outcomes of these tests indicated that functional groups and structural features of both nVZI and MWCNT existed in nZVI@MWCNT nanocomposite. Moreover, FESEM results showed the nZVI@MWCNT has a uniform morphology without any defect. After characterisation, the nZVI@MWCNT nanocomposite has been used as a nano- sorbent for the removal of dyeing including RB4, RR46, RY28 and textile wastewater (RWW). For this purpose, pH, temperature, nano-sorbent dosage, dye concentration and time were chosen as operation parameters. Results indicated that 30 min time, pH= 6, 25 C temperature and 4 ppm concentration and 0.2 g nano-sorbent were the optimum conditions for dye removal. In these conditions, the removal efficiency for RB4, RR46, RY28 and RWW was 98%, 94%, 81% and 80%, respectively. Also, the outcomes of thermodynamic, kinetics and isotherm assessment were shown that the dye removal reaction was exothermic, pseudo-first-order and following Freundlich isotherm. Ultimately, according to high removal efficiency and small time of reaction, it can be concluded that the nZVI@MWCNT is a high-performance and efficient nano-sorbent for textile wastewater treatment.

Bibliographic Details

Faezeh Fateh; Mohammad Saber Tehrani; Mohammad Hadi Givianrad

Elsevier BV

Multidisciplinary; Nanosorbent; Environmental protection; Dye removal; nZVI; kinetics and thermodynamic

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