| 摘要 |
The present invention relates to the technical field of high-molecular material modification, and especially relates to a preparation method and a use of a heavy metal ion adsorbent. The preparation method for the adsorbent comprises the following steps: (1) formulating an aqueous solution of aldehyde group sodium alginate, adding a polyethylene polyamine for reaction, then adding sodium borohydride for reduction, and continuing the reaction so as to obtain amino sodium alginate; and (2) adding a mixed solution of carbon disulfide and sodium hydroxide to the solution obtained after the reaction in step (1), continuing the reaction until carbon disulfide droplets in the solution have disappeared, stopping the reaction, adding an alcohol solvent for precipitating a product, standing and layering, separating the precipitate precipitated at the bottom layer, and drying same so as to obtain the heavy metal ion adsorbent. The adsorbent has a strong adsorptivity to heavy metal ions, and desorption efficiency is improved. |
