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1前言四川某盐厂利用天星桥构造两口天然气探井所产气田卤水，60年代建成年处理卤水12万m3，年产食盐2万t的真空制盐厂，同时也年产盐后母液9000m3（化学组成见表1）。但盐后母液未加利用，长期放入河流，污染严重，危及下游生态环境。盐后母液中除含有较高的钠、钾、硼、钙外
1 Preface A salt plant in Sichuan uses the Tianxingqiao bridge to construct the brine produced by two natural gas exploration wells. In the 1960s, it built a vacuum salt plant with an annual output of 120,000 m3 of brine and 20,000 tons of salt annually, and also produced an annual output of 9000m3 of mother liquor after salt production Composition is shown in Table 1). However, after the salt mother liquor is not used, long-term into the river, serious pollution, endanger the downstream ecological environment. In addition to salt after the mother liquor contains higher sodium, potassium, boron, calcium