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Removal of 1,4-dioxane from industrial wastewaters: routes of decomposition under different operational conditions to determine the ozone oxidation capacity.

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Barndok, Helen and Cortijo, Luis and Hermosilla, Daphne and Negro, Carlos and Ángeles, Blanco (2014) Removal of 1,4-dioxane from industrial wastewaters: routes of decomposition under different operational conditions to determine the ozone oxidation capacity. Journal of Hazardous Materials, 280 . pp. 340-347. ISSN 0304-3894

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Official URL: http://www.sciencedirect.com/science/article/pii/S0304389414006542



Abstract

This paper denotes the importance of operational parameters for the feasibility of ozone (O3) oxidation for the treatment of wastewaters containing 1,4-dioxane. Results show that O3 process, which has formerly been considered insufficient as a sole treatment for such wastewaters, could be a viable treatment for the degradation of 1,4-dioxane at the adequate operation conditions. The treatment of both synthetic solution of 1,4-dioxane and industrial wastewaters, containing 1,4-dioxane and 2-methyl-1,3-dioxolane (MDO), showed that about 90% of chemical oxygen demand can be removed and almost a total removal of 1,4-dioxane and MDO is reached by O3 at optimal process conditions. Data from on-line Fourier transform infrared spectroscopy provides a good insight to its different decomposition routes that eventually determine the viability of degrading this toxic and hazardous compound from industrial waters. The degradation at pH>9 occurs faster through the formation of ethylene glycol as a primary intermediate; whereas the decomposition in acidic conditions (pH<5.7) consists in the formation and slower degradation of ethylene glycol diformate.


Item Type:Article
Uncontrolled Keywords:Ozone; 1,4-dioxane; chemical industry; wastewater treatment; FTIR spectroscopy
Subjects:Sciences > Chemistry > Water
Sciences > Chemistry > Chemical engineering
Sciences > Chemistry > Chemistry, Technical
Sciences > Chemistry > Waste products
ID Code:29259
Deposited On:18 Mar 2015 09:50
Last Modified:18 Mar 2015 09:50

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