Abstract

Dual-responsive hydrogel composites, hydrocomposites (HC), composed of magnetite particles and alginate, which undergo drastic changes in volume in response to pH and magnetic fields, were prepared and employed for the removal of methylene blue (MB) from the aqueous environment. The use of magnets allowed for the control of the MB absorption mechanism and the removal of HCs following their application in water, thereby preventing secondary contamination. The HC capacity for water absorption was found to be dependent on the amount of magnetite and could be altered with the application of a magnetic field. In a 25 mg/L MB solution at pH 6.3 and 8, 20 mg of HC removed 97.7% of MB. The presence of 1% magnetite (w/w) is sufficient for composites to be guided by magnetic stimuli, and the resulting material could be reused at least four times through a simple treatment process.

Graphic Abstract

中文翻译：

---

海藻酸钠启发的双响应水合材料的合成对蓝色亚甲基的吸收

摘要

制备了由磁铁矿颗粒和藻酸盐组成的双响应水凝胶复合材料，氢复合材料（HC），它们会随pH和磁场的变化而发生体积急剧变化，并将其用于从水性环境中去除亚甲基蓝（MB）。磁铁的使用可以控制MB的吸收机理，并在将HCs应用于水中后将其除去，从而防止了二次污染。发现HC的吸水能力取决于磁铁矿的量，并且可以通过施加磁场来改变。在pH值为6.3和8的25 mg / L MB溶液中，除去20 mg HC的97.7％MB。1％磁铁矿（w / w）的存在足以使复合材料受到磁刺激的引导，

图形摘要