The Study of Molecule Interaction for the Noionic Organic Compounds Transport in Soil

• Main Authors: Pei-Wen Yem, 葉佩雯
• Other Authors: Jiunn-Fwu Lee
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/43334841335741042890

碩士 === 國立中央大學 === 環境工程研究所 === 90 === The study is to elucidate the interaction between nonionic organic contaminants (NOC), including PAHs as well as aliphatic compounds, and selected surfactants with and without benzene rings in the soil/water system. The cohesive energy among PAHs, surfactants and soil organic matter( SOM ) can be applied to explain the different interactions of these compounds in soil/water system successfully. The solubility enhancement effect of NOCs from Triton X-100 solution at the below or above CMC concentrations were quite significant. However, solubility enhancement effect of PAHs by straight chain surfactants at the above CMC was relatively insignificant. Because of higher aromatic component, the partition coefficient of PAHs ( ie. Koc ) in soil/water system was greater than NOCs with aliphatic chains. In the case of soil sorption surfactant to consist of soil organic matter, the sorption of NOCs on various types of SOM was varied with different chemical compositions ( e.g. high aliphaticity or aromaticity ). For the sorption of Triton X-100 by Ca-M as a major source of SOM, the log Koc of PAHs is larger than that of straight chain NOCs. If straight chain surfactants as a major source of SOM, the log Koc of straight chain NOCs is greater than that of PAHs. Sorption of straight chain surfactants by SMS to increase SOM, the Kd*/Kd of the straight chain NOCs is greater than the PAHs. However, sorption of Triton X-100 by SMS to increase SOM, the Kd*/Kd of the PAHs is not always greater than that of straight chain NOCs. Keywords : cohesive energy, NOCs, PAHs, partition coefficient, solubility enhancement.