对于公共供水来说，硝酸盐浓度的增加正在成为许多国家的一个重要问题。在可用的处理工艺中，近年来对通过膜和离子交换去除硝酸盐进行了深入研究。本文介绍了反渗透法和离子交换法去除硝酸盐的基本原理。详细讨论了纳滤膜与离子交换树脂的组合工艺。

For public water supplies, the increase in nitrate concentration is becoming an important problem in many countries. Among the treatment processes available, the removal of nitrates by membranes and ion exchange has been thoroughly studied in recent years. This paper describes the basic principles of nitrate removal by reverse osmosis and by ion exchange. The proposed combined process of nanofiltration membranes with ion exchange resins is discussed in more detail.