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Environmental Engineering Research 2004;9(2): 88-95. DOI: https://doi.org/10.4491/eer.2004.9.2.088
EQUILIBRIUM CONCENTRATION AND OVERALL HENRY'S LAW CONSTANT OF THE DISSOLVED OZONE
Jung-A Rhim
School of Env. System Eng. and Industrial Health, Catholic University of Pusan
Corresponding Author: Jung-A Rhim ,Tel: +82-51-510-0629, Fax: +82-51-510-0628, Email: jarhim@korea.com
Received: June 9, 2003;  Accepted: April 6, 2004.
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ABSTRACT
Abstract : The purpose of this study were to evaluate Henry's law constants during ozonation in aqueous solution. The influence of the operating variables : pH, temperature, ionic strength, alkalinity and total organic carbon, on the overall Henry's law constant has been investigated. The overall Henry's law constant(Ho) calculated from the multiple regression analysis for the operating variables can be expressed as follows. In #(, = 0.23 ln[/>//]+0.57 In[Temp] + 1.40 [/.S] + 0.024 U//9 + 0.053 [ TOC] +10.71 The most relevant was ionic strength. The effect of parameters on Ho was in proportion to [ pH] °'z>, [ Temp]057, elAUS], e °-mAli], e°-Mroa for pH^ temperature, ionic strength, alkalinity and total organic carbon, respectively. The ranges of Ho^fVuolf) were 0.4xl06~20xl06. If the H0 value in aqueous solution is large enough, the equilibrium ozone concentration will not be increased by the large amount of the gaseous ozone dose. This occurs due to a drop in the liquid phase ozone mass transfer and to a higher ozone discharge in the air. The value of Ho was used to protect unnecessary gaseous ozone dose and determine the optimum ozone dose.
Keywords: equilibrium ozone concentration | overall Henry's law constant | ionic strength | alkalinity | total organic carbon
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