鄂尔多斯盆地白垩系方沸石岩的发现及其对硫酸盐水的处理

运用微观分析方法,在鄂尔多斯盆地白垩系钻孔岩样中首次发现方沸石类矿物,并对方沸石岩进行了提纯和改性,用于当地硫酸盐水的处理,取得了明显的效果。对于100 mL起始浓度为1000 mg/L的硫酸盐溶液,改性方沸石岩较佳的水处理工艺条件为:用量2.0 g,搅拌时间60 min,粒度小于100目。改性方沸石岩对起始浓度为1000 mg/L的硫酸盐溶液,一次水处理后硫酸盐含量就低于国家标准。对于起始浓度高于1000 mg/L的硫酸盐溶液,几次水处理后硫酸盐含量也能低于国家标准。这为鄂尔多斯盆地劣质地下水的改良开辟了一条新途径。

The Newly Discovered Analcitite in Cretaceous System in the Ordos Basin and Its Treatment for Sulfate-bearing Water

Analcite minerals have been firstly discovered in drill cores of Cretaceous sedimentary rocks in the Ordos basin by using micro-analysis. Analcitite has been purified and modified first and then has been used to treat the local sulfate-bearing water with obvious good effective.To treat 100mL solution with sulfate concentration of 1000mol/L,the good technological condition is listed below.It needs 2.0 g of modified analcitite powder with grain size of less than 100 mesh,takes 60 min of stirring.The sulfate content in the water, which was treated once time by using modified analcite,is decreased from its initial sulfate content of 1000mol/L to less than the country standard value of normal water.After several times of treatment on the water containing over 1000mol/L by using the modified analcite,the sulfate content in water also can be decreased to less than that of country standard.This is a new and effective method for improving the quality of groundwater in the Ordos basin.