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Decolourisation of Anionic Azo Dye in Industrial Wastewater Using Adsorption Process: Investigating Operating Parameters

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Abstract

In this study, the anionic azo dye was taken out of an aqueous solution using the batch adsorption approach. Zeolite NaX and Fe3O4 magnetic nanoparticle adsorbents were employed. The effects of the variables such as initial azo dye concentration (5–45 mg/L), shaking rotary speed (100–200 rpm), pH (2–10) and contact time (10–140 min) were examined with both doses of adsorbents (0.1–0.5 g) Zeolite NaX and Fe3O4 magnetic nanoparticles. The outcomes showed that good removal efficiencies were attained for both adsorbents Zeolite NaX and Fe3O4 magnetic nanoparticles, with values of 72.34% and 99.99%, respectively. The ideal values for both adsorbents were achieved, including pH of 2, initial azo dye concentration of 5 mg/L, shaking speed of 180 rpm, contact period of 120 min and adsorbent dose of 0.3 g of Zeolite NaX and Fe3O4 magnetic nanoparticles. The results demonstrated that when the Langmuir, Freundlich and Temkin isotherm adsorption models were compared, the Langmuir isotherm adsorption model showed a higher correlation coefficient R2 for Zeolite NaX and Fe3O4 magnetic nanoparticles of 0.9958 and 0.9767, respectively. Zeolite NaX and Fe3O4 magnetic nanoparticle adsorption rates were found to support pseudo-first-order kinetics with strong correlation R2 values of 0.9894 and 0.9728, respectively. The findings indicate that Zeolite NaX has a lower dye removal efficiency than Fe3O4 magnetic nanoparticles under the same working conditions.

Highlights

  • The NaX and Fe3O4 adsorbents were used to remove the anionic azo dye successfully.

  • A maximum azo dye removal was achieved on Fe3O4 nanoparticles adsorbent.

  • Fe3O4 was found very active for removal of azo dye compounds from wastewater.

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Acknowledgements

The authors wish to thank the Department of Chemical Engineering, University of Technology- Iraq.Baghdad, Iraq.

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All authors are contributed effectively in this paper; all experimental work was achieved by E. H., and R. H. with help of T. M., the writing paper as original draft preparation. T. M. was responsible about the idea of the paper as a supervisor and Writing- Reviewing and Editing paper with revision as well with help of N. S.

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Correspondence to Talib M. Albayati.

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Khader, E.H., Khudhur, R.H., Abbood, N.S. et al. Decolourisation of Anionic Azo Dye in Industrial Wastewater Using Adsorption Process: Investigating Operating Parameters. Environ. Process. 10, 34 (2023). https://doi.org/10.1007/s40710-023-00646-7

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  • DOI: https://doi.org/10.1007/s40710-023-00646-7

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