Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2022 Jul 30;12(1):13144.
doi: 10.1038/s41598-022-16977-8.

Fabrication of polyamide-12/cement nanocomposite and its testing for different dyes removal from aqueous solution: characterization, adsorption, and regeneration studies

Saleh Ahmed Aldahash  1 , Prerna Higgins  2 , Shaziya Siddiqui  3 , Mohammad Kashif Uddin  4
Affiliations

Fabrication of polyamide-12/cement nanocomposite and its testing for different dyes removal from aqueous solution: characterization, adsorption, and regeneration studies

Saleh Ahmed Aldahash et al. Sci Rep. .

Abstract

Polyamide-12/Portland cement nanocomposite was prepared by using the exfoliated adsorption method. The fabricated nanocomposite was applied first time to remove Congo red (CR), brilliant green (BG), methylene blue (MB), and methyl red (MR) from the synthetic wastewater. The polymer nanocomposite was characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, elemental mapping, Brunauer-Emmett-Teller surface area analysis, and X-ray diffraction. The adsorption was rapid and all the studied dyes were absorbed on the surface of the polymer nanocomposite in 90 min. The point of zero charge was found at pH 5 and the factors such as pH, time, and temperature were found to affect the adsorption efficiency. Freundlich isotherm and pseudo-second-order models well-fitted the adsorption isotherm and kinetics data, respectively. The calculated maximum adsorption capacity was 161.63, 148.54, 200.40, and 146.41 mg/g for CR, BG, MB, and MR, respectively. The mode of the adsorption process was endothermic, spontaneous, and physical involving electrostatic attraction. On an industrial scale, the high percentage of desorption and slow decrease in the percentage of adsorption after every five regeneration cycles confirm the potential, practicality, and durability of the nanocomposite as a promising and advanced adsorbent for decolorization of colored wastewater.

PubMed Disclaimer

Conflict of interest statement

The authors declare no competing interests.

Figures

Figure 1
Figure 1
BET adsorption–desorption isotherm (a) A plot of 1/[W(P/P0 − 1)] vs. (P/P0) (b).
Figure 2
Figure 2
SEM images of PA-12/PC nanocomposite (a–f), CR adsorbed PA-12/PC nanocomposite (g,h), BG adsorbed PA-12/PC nanocomposite (i,j), MB adsorbed PA-12/PC nanocomposite (k) and MR adsorbed PA-12/PC nanocomposite (l).
Figure 3
Figure 3
EDS images of PA-12/PC nanocomposite (a), CR adsorbed PA-12/PC nanocomposite (b), BG adsorbed PA-12/PC nanocomposite (c), MB adsorbed PA-12/PC nanocomposite (d) and MR adsorbed PA-12/PC nanocomposite (e).
Figure 4
Figure 4
Elemental mapping of PA-12/PC nanocomposite (a), CR adsorbed PA-12/PC nanocomposite (b), BG adsorbed PA-12/PC nanocomposite (c), MB adsorbed PA-12/PC nanocomposite (d) and MR adsorbed PA-12/PC nanocomposite (e).
Figure 5
Figure 5
FT-IR spectra of PA-12/PC before and after dyes adsorption.
Figure 6
Figure 6
XRD pattern of PA-12/PC nanocomposite (a), PA-12 powder (b) and PC (c).
Figure 7
Figure 7
(a,b) HRTEM of PA-12/PC nanocomposite.
Figure 8
Figure 8
Effect of pH on CR, BG, MB and MR adsorption onto PA-12/PC nanocomposite (a) point of zero charge of PA-12/PC nanocomposite (b).
Figure 9
Figure 9
Adsorption mechanism of dyes adsorption on PA-12/PC nanocomposite.
Figure 10
Figure 10
Effect of time and concentration on CR adsorption (a), BG adsorption (b), MB adsorption (c) and MR adsorption (d).
Figure 11
Figure 11
Adsorption isotherm models: Langmuir (a), Freundlich (b).
Figure 12
Figure 12
Percentage desorption of dyes using various desorbing eluents.
Figure 13
Figure 13
Regeneration performance of PA-12/PC nanocomposite for the adsorption of CV (a) BG, (b) MB, (c) and MR (d).
See this image and copyright information in PMC

Similar articles

See all similar articles

Cited by

See all "Cited by" articles

References

    1. Baig U, Uddin MK, Gondal MA. Removal of hazardous azo dye from water using synthetic nano adsorbent: Facile synthesis, characterization, adsorption, regeneration and design of experiments. Colloids Surf. A Physicochem. Eng. Asp. 2020;584:124031. doi: 10.1016/j.colsurfa.2019.124031. - DOI
    1. Uddin MK, Mashkoor F, Al-Arifi I, Nasar A. Simple one-step synthesis process of novel MoS2@bentonite magnetic nanocomposite for efficient adsorption of crystal violet from aqueous solution. Mater. Res. Bull. 2021 doi: 10.1016/j.materresbull.2021.111279. - DOI
    1. Uddin MK, Bushra R. Synthesis and characterization of composite cation-exchange material and its application in removing toxic pollutants. Enhancing Cleanup of Environ. Pollut. 2017 doi: 10.1007/978-3-319-55423-5_9. - DOI
    1. Khan MA, Uddin MK, Bushra R, Ahmad A, Nabi SA. Synthesis and characterization of polyaniline Zr(IV) molybdophosphate for the adsorption of phenol from aqueous solution. React. Kinet. Mech. Catal. 2014;113:499–517. doi: 10.1007/s11144-014-0751-x. - DOI
    1. Uddin MK, Baig U. Synthesis of Co3O4 nanoparticles and their performance towards methyl orange dye removal: Characterisation, adsorption and response surface methodology. J. Clean. Prod. 2019;211:1141–1153. doi: 10.1016/j.jclepro.2018.11.232. - DOI

Publication types