Preparation method of macromolecular adsorbent for boron element in water phase

The invention discloses a preparation method of a macromolecular adsorbent for boron element in a water phase. The preparation method comprises the following steps: preparing a polymer by taking aniline as a monomer and adopting an in-situ polymerization reaction; ultrasonically dispersing the polymer in a 1 M NaOH aqueous solution, soaking overnight, filtering, leaching with the 1 M NaOH aqueous solution for several times, and then washing with deionized water until the pH value is 7; carrying out ring-opening reaction with glycidyl; in the presence of ferroferric oxide nanoparticles, preparing a polystyrene-coated ferroferric oxide nano composite material by taking styrene as a monomer and adopting an in-situ polymerization reaction; and carrying out chloromethylation reaction, and carrying out reaction on N-methyl-D-glucosamine and chloromethyl to prepare the meglumine modified polystyrene/ferroferric oxide adsorbent P2. The adsorbent can effectively enrich boron resources in a water phase, after the adsor