水中油浓度在线检测方法的研究

Research on the Online Detection of Oil Concentration in Water

石油的开采和运输过程中时常伴随着石油的泄漏和污染,当前矿物油的泄漏问题日益严重,已经引起了人们的高度关注。水中油类物质会破坏水体的生态平衡,漂浮在水面以油膜形式存在的油会影响空气和水的气体交换,危害水生物的生存。分散于水中以乳化状态存在的油被微生物分解时,将消耗水中的溶氧,容易使水质进一步恶化。因此,对于水中油类污染物含量的检测显得尤为重要。水中油类物质含量的在线检测是一个技术难题,目前水中油的检测技术以红外分光光度法、紫外荧光法和气相色谱法为主,难以满足水中油在线检测的要求。本文提出了一种新型的水中油类物质含量的在线检测方法,创造性地将颗粒光散射技术引入到水中含油量的在线分析领域。通过分析油滴颗粒在空间中的光散射分布,建立了散射信号与含油量之间的相关关系,实验证明,光散射法与红外分光光度法测定的结果一致,相关系数R2>0.98。光散射法具有快速、无污染的优点,可用于海洋、河流等水体中油类污染的在线检测。

A novel technology to measure oil concentration in water is presented, and mie-scattering theory was creatively intro duced to oil-in-water detection in the present study. A variety of oil samples were examined to obtain both scattering and infrared absorption spectra, and the linear correlation between light scattering intensity and measures with infrared spectrophotometry is more than 0. 98. In addition, compared to the conventional methods, light scattering method requires no chemical reagent, and it is suitable for in situ measurement of oil in water.