Ecological modified bentonite phosphorus fixing agent and preparation method thereof

The invention provides an ecological modified bentonite phosphorus fixing agent and a preparation method thereof, the ecological modified bentonite phosphorus fixing agent comprises lanthanum chloride modified calcium bentonite, and the particle size of the calcium bentonite is 3-5mm. The preparation method comprises the following steps: S1, mixing and stirring calcium bentonite and a lanthanum chloride solution according to a mass volume ratio of 1: 20; s2, carrying out microwave synthesis reaction on the mixed slurry; and S3, washing, drying and crushing the reacted product to obtain the ecological modified bentonite phosphorus fixing agent. The ecological modified bentonite phosphorus fixing agent can effectively increase the deposition speed, can be uniformly distributed in bottom mud, and improves the total phosphorus treatment effect of the bottom mud. 本发明提供了一种生态改性膨润土固磷剂及其制备方法，生态改性膨润土固磷剂，包括经氯化镧改性的钙基膨润土，其粒径在3～5mm。制备方法，包括以下步骤：S1、将钙基膨润土与氯化镧溶液以质量体积比为1∶20混合搅拌；S2、将混合后的浆液进行微波合成反应；S3、将反应后的产物洗涤、烘干、破碎后得生态改性膨润土固磷剂