▎ 摘　　要

The increasing use of rare earth elements (REEs) in a wide range of high-tech applications, leading to global ever-increasing demands, has stimulated the development of new technologies for REEs separation and recovery. Herein, an efficient porous graphene oxide/poly (N-isopropyl acrylamide-maleic acid) [GO/P(NIPAM-MA)] cryogel was synthesized by cryopolymerization and was employed as the REEs recovery adsorbent. The cryogel exhibits stable, microporous interpenetrating structure and thermosensitive characteristics. The adsorption follows the pseudo-second-kinetic model indicating that the adsorption process was controlled by the adsorption sites with the equilibrium adsorption capacity of La3+ was 33.1 mg/g. The Langmuir isotherm model fits the data better, revealing the homogenous adsorption for REEs on the surface of the adsorbent. Besides, the adsorbent displayed preferential adsorption of La3+ compared to Cu2+, Co2+, Ni2+, Nd3+, Yb-3(+) in a binary solution suggested the high level of La3+ separation efficiency that exceeded 95%. In general, the eco-friendly, sustainability and higher efficiency characteristics of GO/P(NIPAM-MA) cryogel provide a promising route for recycling rare earth elements from wastewater.