Preparation of magnetic palygorskite clay adsorbent and application thereof in dye wastewater treating

The invention provides a preparation method of a magnetic palygorskite clay adsorbent and belongs to the technical field of water treatment. The method comprises the following steps of: mixing 70-95% of palygorskite clays and 30-5% of magnetic ferroferric oxide into water by weight percentage; placing the solution in an ultrasonic wave condition to be agitated for 5-20 minutes and standing for 3-5 hours; pouring supernatant; and drying and placing lower-layer mixing slurry in a ball grinding mill to be milled for 0.5-1 hour to obtain the magnetic palygorskite clay adsorbent ( which serves as a core step). Tested by an experiment, the magnetic palygorskite clay adsorbent prepared by using the method has very strong adsorption capability to methylene blue in wastewater and is used for treating dye wastewater; and on the aspects of the adsorption capability and the post-period separation, good performances and advantages are realized.