The article introduces the research development,the use of magnesium in seawater and brine.It may provide a new approach for all-around use of magnesium resource.

• 介绍了磷酸铵镁沉淀法脱除废水中氮、磷的研究现状,并对利用海水、卤水中的镁盐脱除氮磷进行展望,为开发大规模利用镁盐的新途径提供参考。