期刊
ADVANCED FUNCTIONAL MATERIALS
卷 29, 期 32, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201901009
关键词
alginate; amidoxime; marine sponges; melamine sponge; uranium extraction
类别
资金
- Hainan Provincial Natural Science Foundation of China [519QN178]
- Finance Science and Technology Project of Hainan Province [ZDYF2018004]
- National Basic Research of China [2015CB932500, 2016YFE0102200, 2018YFB0104404]
- National Natural Science Foundations of China [51788104, 51661135025, 51706117, 51775152, 61761016]
- Start-up Research Foundation of Hainan University [KYQD(ZR)1817, KYQD(ZR)1814]
Marine sponges are used as biomonitors of heavy metals contamination in coastal environment as they process large amounts of water and have a high capacity for accumulating heavy metals. Here, inspired by the unique physical and physiological features of marine sponges, a surface engineered synthetic sponge for the highly efficient harvesting of uranium from natural seawater is developed. An ultrathin poly(imide dioxime) (PIDO)/alginate (Alg) interpenetrating polymer network hydrogel layer is uniformly wrapped around the skeleton of a melamine sponge (MS) substrate through a simple dipping-drying-crosslinking process, providing the hybrid MS@PIDO/Alg sponge with excellent uranium adsorption performance and sufficient mechanical strength to withstand the harsh conditions of practical applications. The maximum adsorption capacity reaches 910.98 mg-U g-gel(-1) for the PIDO/Alg hydrogel layer and 291.51 mg-U g-sponge(-1) for the whole hybrid MS@PIDO/Alg sponge in uranium-spiked natural seawater. The adsorption capacity measured after 56 d of exposure in 5 tons of natural seawater is evaluated to be 5.84 mg-U g-gel(-1) (1.87 mg-U g-sponge(-1)). This novel approach shows great promise for the mass production of high-performance sponge adsorbent for uranium recovery from natural seawater and nuclear waste.
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