| dc.description.abstract | Abstract
Our previous researches have been conducted on a series studies for the volatilization behavior of volatile organic matters from the waste water. From the results, it has been shown presented that, when the dissolving macromolecular organic matter or surfactant presented in the system, the volatilization rate of organic matters show dramatically decrease. During the investigation, we have also found that, when alcohol is existing in the system, the volatilization rate of organic matters will increase as compare to the systems without alcohol. The phenomenon is more obvious especially when wind is blowing through the surface of the liquid. This research carried out a series of different gaseous phase conditions to evaluate the influence of alcohol on the volatilization behavior of organic matters.
The selected compounds consist of 11 kinds of mono-aromatic hydrocarbon, with similar structure and Henry’’s constant value (0.085 to 0.395), but there is great difference of water solubility (1780 mg/L to 0.56 mg/L). We divided the compounds into three classes according with the level of water solubility during the experiment ranged. The alcohol adding is mainly ethanol and heptanol, the concentration ranged from 100 mg/L to 500 mg/L and gaseous phase turbulence changed from 0 m/s to 1.0 m/s.
As the result, we could conclude that the ability of heptanol able to attract the organic pollution to the solution interface is much greater than that of ethanol. At still condition, the ethanol could truly cause the inhibition on the organic vaporization. However, under the condition of gaseous phase turbulence 1.0m/s, the organic volatilization is increased. Moreover, the heptanol could increase the organic compounds volatilization. The volatilization rate of the organic compounds would obviously be risen when the condition of micro-wind speed (0.2 m/s) is added in.
In addition, we also found that the chemical compounds with low water solubility could be affected by the gaseous phase turbulence condition which is greater than that of compounds with high water solubility.
Key word：Volatilization, alcohol, mass transfer coefficient (KOL), characteristic coefficient of interface ( αA) | en_US |