Abstract
Introduction
In the nuclear industry 1,4-dioxane is used as a solvent in liquid scintillation technique for measuring low-energy beta-emitters such as 3H or C14 in aqueous media. Improper disposal of 1,4-dioxane can contaminate the ground and surface waters. Conventional wastewater treatment processes like chemical treatment, air stripping, carbon adsorption, and biological treatment are ineffective for the degradation of 1,4-dioxane.
Methods
In the present study, the kinetics of degradation of 1,4-dioxane using advanced oxidation processes viz., H2O2 alone, Fe(II) + H2O2, UV (15 W) + H2O2, UV (15 W) + Fe(II) + H2O2, US (130 KHz) + Fe(II) + H2O2, and sunlight + Fe(II) + H2O2 at pH 3.0 was investigated. The optimization of Fe (II) for the processes using Fe (II) + H2O2 was carried out.
Conclusions
The kinetics of degradation using sunlight + Fe (II) + H2O2 was found to be fastest when compared to the other processes. The degradation was found to follow first-order kinetics. Formation of acidic intermediates was suspected from the observed pH changes during the degradation processes.
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Acknowledgments
The authors express their sincere thanks to Mrs. Sharal Sarojini for having assisted in carrying out the experimental work and Sh. TSS Raghavan for technical assistance.
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Chitra, S., Paramasivan, K., Cheralathan, M. et al. Degradation of 1,4-dioxane using advanced oxidation processes. Environ Sci Pollut Res 19, 871–878 (2012). https://doi.org/10.1007/s11356-011-0619-9
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DOI: https://doi.org/10.1007/s11356-011-0619-9