کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1058035 947103 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Volatilization characteristics of organic solutes in stirred solution
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
پیش نمایش صفحه اول مقاله
Volatilization characteristics of organic solutes in stirred solution
چکیده انگلیسی

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 (KOL (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 102 to 10−5. The relationship of the KOL relative to G, H and M was obtained via multiple regression. The obtained values of these parameters indicate that the primary factor affecting the KOL values of the high H compounds is their M values. The effects of the H values on the KOL values of the high H compounds can be neglected. On the other hand, the H value is the major factor determining the KOL values of the low H compounds. The changes in the KOL 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 KOL values. The effects of the liquid-mixing intensity on the KOL values of the organic compounds increase with increasing H values. The variation in the KOL 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 KOL 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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Management - Volume 90, Issue 11, August 2009, Pages 3422–3428
نویسندگان
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