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Hydrogen Peroxide/Zero-ValentIron/Persulfate Approach for Sunset Yellow Dye Degradation: Operating Parameters and Synergistic Effect

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Abstract

The presence of dye contaminants in industrial effluents has become a public health concern and environmental issue. In this study, Zero Valent Iron (ZVI) was employed as a catalyst to activate persulfate (PS) and hydrogen peroxide (H2O2) for removal of Sunset Yellow (SY) from aqueous solutions using integrated H2O2/ZVI/PS process. In this regard, it is essential to obtain the best performance of the proposed H2O2/ZVI/PS system through optimizing its operational parameters including initial pH, H2O2 concentration, PS concentration, and Feo dosage. According to the results, about 100% efficiency was obtained by the H2O2/ZVI/PS for dye removal at pH = 3, ZVI 50 mg/L, 1 mM H2O2 concentration, 1 mM PS concentration, and 30 min reaction time. The kinetic study showed that the H2O2/ZVI/PS process followed the first-order kinetic model. The effect of some anions on decolorization was also studied. According to the results, the order of inhibiting effect of anions on the performance of H2O2/ZVI/PS system was as follows: NO2 > NO3 > Cl > HCO3. The Total Organic Carbon (TOC) test showed that about 65% of mineralization was achieved after 30 min. Moreover, the ZVI particles showed a suitable efficiency after five cycles, and hence, they can be used as an eco-friendly, cost effective and reusable catalyst for the treatment of wastewaters contaminated with organic dye.

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Acknowledgements

The authors would like to thank Farshid Ghanbari for his useful comment on the manuscript. This study was financially supported by Ahva Jundishapur University of Medical Sciences (Grant No. REC.1398.094).

Funding

This work was supported by the Ahvaz Jundishapur University of Medical Sciences Grant No. REC.1398.094].

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Mehdi Ahmadi contributed to the conception and design of the study. Rozhan Feizi conducted material preparation, data collection, and analysis. The first draft of the manuscript was written by Rozhan Feizi, and all authors reviewed early drafts of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Rozhan Feizi.

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Ahmadi, M., Feizi, R. Hydrogen Peroxide/Zero-ValentIron/Persulfate Approach for Sunset Yellow Dye Degradation: Operating Parameters and Synergistic Effect. Environ. Process. 8, 1533–1548 (2021). https://doi.org/10.1007/s40710-021-00541-z

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  • DOI: https://doi.org/10.1007/s40710-021-00541-z

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