Adsorbent resin for removing perfluorinated pollutants from body of water, preparation therefor, and use thereof

A method for preparing an adsorbent resin for removing perfluorinated pollutants from a body of water, wherein the method comprises the following steps:

• accurately weighing 500 g of deionized water and 4 g of polyvinyl alcohol into a reactor, heating up to 40-50° C., starting stirring to mix well, thereby producing an aqueous phase;
• accurately weighing and mixing well 100 g of divinylbenzene, 120 g of toluene and 1 g of benzoyl peroxide in a beaker to produce an oil phase;
• allowing the aqueous phase to stand for 20 min and then adding the oil phase thereto, and adjusting the stirring speed to allow oil droplets to have a size distribution in the range of 45-20 mesh;
• heating up to 75° C. and holding for 3 h, heating up to 82° C. and holding for 4 h, heating up to 87° C. and holding for 4 h, terminating the reaction;
• drying after removing the porogen with ethanol to obtain dry resin-based spheres;
• accurately weighing 80 g of the dry resin-based spheres into the reactor, adding 800 g of dichloroethane and 50 g of p-xylylene dichloride, stirring and swelling at room temperature for 10 h to ensure that the p-xylylene dichloride is fully dissolved and the dry resin-based spheres are fully swollen, cooling to 0-5° C. using an ice-salt bath, adding 20 g of ferric chloride in batches, keeping the reaction in the ice-salt bath for 30 min, carrying out the reaction at room temperature for 45 min, heating up to 80° C. and reacting for 10 h, and completing the reaction;
• the resin obtained was soaked and cleaned with acetone, rinsed with deionized water, then rinsed with ethanol and ionized water respectively, and filtered out to obtain the product, and the product has particle size of 0.45 mm tested by using Malvern MS3000 laser particle sizer, and a specific surface area of 987 m2/g and an average micropore diameter of 4.32 nm tested by using 3H-2000III automatic nitrogen adsorption specific surface area tester.