本文介绍了利用扫描电子显微镜和能量色散x射线光谱仪对双介质过滤装置的介质表面特性进行的探索性研究。目的是评估过滤介质成熟过程中发生的沉积反应。每周从新过滤器中收集样本。为了提供一个参考点，从一个原始过滤器和一个使用了大约一年的过滤器中采集介质样本。 对每个过滤器的介质特性进行了总结。

This paper describes an exploratory study of the surface characteristics of media from dual media filtration units that was conducted using scanning electron microscopy coupled with energy dispersive x-ray spectroscopy. The objective was to evaluate deposition reactions that occur during the process of filter media maturation. Weekly samples were collected from a new filter as it was placed in service. To provide a reference point, samples of media were taken from one of the original filters and a filter that had been in service for about one year. A summary of the characteristics of media from each filter is discussed.