Frozen salting hydrogels consisting of polydopamine and hydroxyapatite used for oil-water separation

In recent years, with the continuous advancement of industrialization and economic globalization, oil spill pollution incidents have become more frequent, among which marine is most prominent. If a large amount oily sewage not treated in time, it will pose great threat to safety ecology. this work, natural biological materials were used prepare PDA-HAP hydrogel, membrane was by freezing salting out effectively improve strength membrane. The prepared has good flux, can be repeatedly, environmentally friendly. Therefore, hydrogel play significant role field treatment.