动态膜压法对有机污染物表面膜性质的研究  

Application of dynamic membrane pressure method on the surface membrane of organic pollutants

作　　者：宗文辉[1] 岳秀丽[1] 戴志飞[1] 

机构地区：[1]哈尔滨工业大学城市水资源与水环境国家重点实验室,哈尔滨150090

出　　处：《哈尔滨工业大学学报》2010年第6期933-936,共4页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金资助项目(20977021);黑龙江省自然科学基金资助项目(E-2007-12);黑龙江省科技攻关计划资助项目(GC07C104).

摘　　要：膜压法在自然水体中的应用较为广泛,膜压及膜面积可作为自然水体中有机物含量的表征也可作为水体受污染程度的一种判据.利用膜压仪、傅里叶红外光谱和原子力显微镜研究了分子结构对有机污染物在气/液界面上形成表面膜的影响.结果表明:亲水头部的羟基数目对两亲性化合物所形成的表面膜的结构和性能有很大影响.在相同温度下,羟基数为3的脂质化合物的崩溃压高于羟基数为1的崩溃压,这是由于在固相状态下含有3个羟基的脂质分子间能形成更多的氢键,即分子间作用力更强,使得它的崩溃压更高.相同表面压下,强的氢键作用使得多羟基有机物形成了更致密的表面微结构.实验结果可为建立水体中有机污染物表面膜的状态方程以及城市污水表面膜的测定提供实验基础.Organic content and the pollution of natural water can be characterized by membrane pressure and membrane area in membrane pressure method. Effect of the molecular structure of organic pollutants on their surface membranes formed on the air/water interface was studied using π-A isotherms, Fourier transform infrared spectroscopy and Atomic force microscopy. It was shown that the number of hydroxyl groups had great effect on the properties of surface membranes. At the same temperature, the collapse pressure of the lipid with 3 hydroxyl groups was higher than that of the lipid with 1 hydroxyl group because of stronger hydrogen bonding. In addition, more condensed surface microstructure was found for the former lipid at the same surface pressure. The results may provide a basis for the establishment of the state equation of surface membrane and the measurement of surface membrane of urban sewage.

关 键 词：表面膜 氢键 有机污染物 气/液界面 

分 类 号：X832[环境科学与工程—环境工程]