Preparation method of hybrid membrane adsorbent for removing strontium ions in radioactive wastewater

The invention discloses a preparation method of a hybrid membrane adsorbent for removing strontium ions in radioactive wastewater. The preparation method is characterized by comprising the following steps of adding a silane coupling agent with the mass being 0.01-0.3 time of the mass of PVA (Polyvinyl Alcohol) into a polyvinyl alcohol aqueous solution with the mass percentage concentration being 0.1-10% at the temperature of 0-150 DEG C in inert atmosphere or air, carrying out sol-gel reaction for 1-48h, standing and defoaming a sol-gel product, coating the product to obtain a membrane, and drying for 2-72h under the conditions that the temperature is 0-200 DEG C and the relative humidity is 50-90% so as to obtain the hybrid membrane adsorbent for removing strontium ions in radioactive wastewater. According to the method, adsorption of metal ions and membrane separation of residual liquid left after adsorption can be implemented synchronously, and the operation process is simple and convenient; the prepared h