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 10
2 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.
相似文献