Highly efficient and selective removal of mercury ions using hyperbranched polyethylenimine functionalized carboxymethyl chitosan composite adsorbent

A cost-effective adsorbent for highly efficient removal of mercuric Hg(II) ions from aqueous media remains a great challenge. Herein, a novel polymer-based adsorbent of hyperbranched polyethylenimine functionalized carboxymethyl chitosan semi-interpenetrating network composite (HPFC) was fabricated through a facile one-step crosslinking reaction. Notably, the as-prepared adsorbent demonstrated ultra-high adsorption capacity toward the removal of...