随着城市化的快速发展,工业废水的排放导致了越来越严重的水污染问题。此外,重金属,有机染料,微生物和石油污染经常共存,具有持久性和危害性。开发能够同时处理这些复杂污染物的材料具有重要的现实意义。在这项研究中,通过喷雾制备了基于海藻酸钙的气凝胶膜(PANI@CA膜),聚合,以苯胺和海藻酸钠为原料进行Ca2+交联和冷冻干燥。油水乳液只能在重力作用下通过PANI@CA膜分离,分离效率高达99%。同时,膜能有效截留或吸附有机染料和重金属离子。即使经过10次循环过滤,亚甲基蓝和刚果红的去除率也分别高于92%和63%。Pb2+的去除率可达95%。此外,PANI@CA膜表现出优异的光热转化能力,在808nm激光照射下能有效杀灭金黄色葡萄球菌。PANI@CA膜具有成本低的优点,简单的准备,稳定性好,回收能力强,在废水处理方面具有潜在的应用前景。
With the rapid development of urbanization, the discharge of industrial wastewater has led to increasingly critical water pollution issues. Additionally, heavy metals, organic dyes, microorganisms and oil pollution often coexist and have persistence and harmfulness. Developing materials that can treat these complex pollutants simultaneously has important practical significance. In this study, a calcium alginate-based aerogel membrane (PANI@CA membrane) was prepared by spraying, polymerization, Ca2+ cross-linking and freeze-drying using aniline and sodium alginate as raw materials. Oil-water emulsion can be separated by PANI@CA membrane only under gravity, and the separation efficiency was as high as 99 %. At the same time, the membrane can effectively intercept or adsorb organic dyes and heavy metal ions. The removal rates of methylene blue and Congo red were above 92 % and 63 % respectively even after ten times of cyclic filtration. The removal rate of Pb2+ was up to 95 %. In addition, PANI@CA membrane shows excellent photothermal conversion ability, and it can effectively kill Staphylococcus aureus under 808 nm laser irradiation. PANI@CA membrane has the advantages of low cost, simple preparation, good stability and high recycling ability, and has potential application prospects in wastewater treatment.