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J Environ Manage

Title:		Volatilization characteristics of organic solutes in stirred solution
Author(s):		Chao HP;
Address:		"Department of Bioenvironmental Engineering, Chung Yuan Christian University, Chung-Li 32023, Taiwan. hpchao@cycu.edu.tw"
Journal Title:		J Environ Manage
Year:		2009
Volume:		20090623
Issue:		11
Page Number:		3422 - 3428
DOI:		10.1016/j.jenvman.2009.05.022
ISSN/ISBN:		1095-8630 (Electronic) 0301-4797 (Linking)
Abstract:		"The effects of turbulence intensity (velocity gradient, G (s(-1))), Henry's law constant (H), and molecular weight (M) on the volatilization rates of organic compounds are examined using changes in the mass transfer coefficients (K(OL) (cm/min)) under specific liquid-mixing intensities. The selected compounds were divided into three groups according to their H values (mole in gas/mole in liquid, dimensionless), which ranged from 10(2) to 10(-5). The relationship of the K(OL) relative to G, H and M was obtained via multiple regression. The obtained values of these parameters indicate that the primary factor affecting the K(OL) values of the high H compounds is their M values. The effects of the H values on the K(OL) values of the high H compounds can be neglected. On the other hand, the H value is the major factor determining the K(OL) values of the low H compounds. The changes in the K(OL) values of the different H compounds exhibit different profiles as the liquid-mixing intensity increases. The M and H values of middle H compounds possibly affect their K(OL) values. The effects of the liquid-mixing intensity on the K(OL) values of the organic compounds increase with increasing H values. The variation in the K(OL) values might be a result of the concentration of the organic compounds at the interface between the liquid and gas films. The empirical relationship between K(OL) and some selected parameters, G, H and M, is examined in this study. The obtained results can help to estimate volatilization loss of organic solutes in wastewater treatment facilities"
Keywords:		Environmental Monitoring/methods Organic Chemicals/*chemistry Solutions/*chemistry Volatilization;
Notes:		"MedlineChao, Huan-Ping eng Research Support, Non-U.S. Gov't England 2009/06/26 J Environ Manage. 2009 Aug; 90(11):3422-8. doi: 10.1016/j.jenvman.2009.05.022. Epub 2009 Jun 23"