Water-insoluble polyethyleneimine adsorbents for the high-efficiency removal of Hg(ii) from aqueous solution

The PAPEI adsorbent achieved a high adsorption capacity of 1832 mg g −1 for Hg( ii ) accompanied with excellent selectivity, as evidenced by a distribution coefficient ( K d ) of 3.2 × 10 4 mL g −1 .