Functionalized sponge adsorbent was prepared by a mussel-inspired strategy, which achieved successive modification of material and remained the properties of substrate. The dopamine derivative, DOPAm, was synthesized and adhered to polyurethane (PU) sponge before in situ polymerization with sodium p-styrenesulfonate. The adsorbent showed superior removal efficiency for cationic dyes (98.9 % for methylene blue (MB) at the concentration of 200 μmol/L); it took 1 s only for the adsorbent to adsorb the dyes by swelling and squeezing out the bulk solution simply. Meanwhile, the superior adsorption effect of the adsorbent could be maintained in a wide range of solution pH values from 1 to 13 at room temperature (293 K) in several repeat experiments, due to the slight influence of strong acid and alkali on polysulfonate. With unchanged other experimental conditions, the removal efficiency is still more than 90 % after reusing for 10 times at the different concentrations of MB dye solutions (50, 100, 200 μmol/L). For large-scale wastewater treatment, with the removal efficiency of 80.0 %, the adsorbent could purify 4.1 L wastewater containing MB dye (100 μmol/L) with the maximum flux of 22.2 L/(m³·s) without the assistance of any equipment except for a vacuum pump. Therefore, the adsorbent has great possibilities to be applied in high-efficient and convenient treatment of wastewater in a large scale.

通过贻贝启发的策略制备功能性海绵吸附剂，该材料实现了材料的连续修饰，并保留了基材的性能。在原位合成多巴胺衍生物DOPAm并粘附到聚氨酯（PU）海绵上与对苯乙烯磺酸钠聚合。吸附剂对阳离子染料具有优异的去除效率（浓度为200μmol/ L时，亚甲基蓝（MB）的去除效率为98.9％）；吸附剂仅需1 s即可通过简单地溶胀和挤出本体溶液来吸附染料。同时，由于强酸和强碱对聚磺酸盐的轻微影响，在多次重复实验中，在室温（293 K）的溶液pH值范围从1到13的宽范围内，可以保持吸附剂的优异吸附效果。在其他实验条件不变的情况下，在不同浓度的MB染料溶液（50、100、200μmol/ L）下重复使用10次后，去除效率仍高于90％。对于大规模废水处理，吸附剂的净化率为80.0％，可以净化4。³ ·s），没有真空泵以外的任何设备的协助。因此，该吸附剂在大规模，高效，方便地处理废水中具有很大的可能性。