Modeling of sonochemical decomposition of CCl4 in aqueous solutions

Rajan, R. ; Kumar, R. ; Gandhi, K. S. (1998) Modeling of sonochemical decomposition of CCl4 in aqueous solutions Environmental Science & Technology, 32 (8). pp. 1128-1133. ISSN 0013-936X

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In the context of removal of organic pollutants from wastewater, sonolysis of CCl4 dissolved in water has been widely investigated. These investigations are either completely experimental or correlate data empirically. In this work, a quantitative model is developed to predict the rate of sonolysis of aqueous CCl4. The model considers the isothermal growth and partially adiabatic collapse of cavitation bubbles containing gas and vapor leading to conditions of high temperatures and pressures in them, attainment of thermodynamic equilibrium at the end of col lapse, release of bubble contents into the liquid pool, and reactions in the well-mixed pool. The model successfully predicts the extent of degradation of dissolved CCl4, and the influence of various parameters such as initial concentration of CCl4, temperature, and nature of gas atmosphere above the liquid. In particular, it predicts the results of Hua and Hoffmann (Environ. Sci. Technol. 1996, 30, 864-871), who found that degradation is first order with CCl4 and that Argon as well as Ar-O3 atmospheres give the same results. The framework of the model is capable of quantitatively describing the degradation of many dissolved organics by considering all the involved species.

Item Type:Article
Source:Copyright of this article belongs to American Chemical Society.
ID Code:11491
Deposited On:16 Nov 2010 13:53
Last Modified:11 May 2012 10:20

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