Among the present methods for water treatment

adsorption process has been widely studied and applied

since it has exhibited many advantages

such as the availability of a wide range of adsorbents

cost-effectiveness

ease of operation and eco-friendliness. Polymer sponge adsorbents not only have the diversity of molecule design but also can coordinate with heavy metal ions due to the active groups

including hydroxyl

carboxyl

amino

etc. on the polymer chains. Meanwhile

polymer adsorbents in the form of sponge have the porous structure and high elasticity

which endow them with high adsorption capacity and excellent recyclability. The introducing of nano-materials (such as nanoparticles

nanofibers

etc. ) can greatly improve the mechanical and adsorption properties of polymer sponge adsorbents through physical blending or chemical modification. In this mini-review

the classification and preparation methods of polymer sponge adsorbents are introduced. In particular

applications for the removal of heavy metals

oils coupled with organic solvents and dyes are summarized. Finally

the shortcomings and future perspective for this promising field are discussed.