writer：Chirag B.Godiya, XiaoCheng, Guozhe Deng, Dawei Li*, Xiaolin Lu*
keywords：Hydrogel, SF, PEI, metal ions
source：期刊
specific source：2019, 7, 102806
Issue time：2019年

The indiscriminate disposal of heavy metal ions poses serious threat to the environment and public health. Herein, we report a sustainable and low-cost silk fibroin (SF)/polyethyleneimine (PEI) composite hydrogel for the remediation of heavy metal ions in the aqueous solutions. The SF/PEI hydrogel demonstrated excellent adsorption capacities for the Cu(II), Pb(II), Cd(II), Zn(II), Ni(II), and Ag(I) ions, which are 163.9, 185.2, 169.5, 125.0, 140.8, and 200.0?mg?g?1, respectively. Via a stepwise adsorption, reduction and utilization procedure, the as-prepared hydrogel shows versatile functionalities depending on the pristine adsorbed metal ion(s), for example, catalytical activity and antibacterial property. Based on the functional SF/PEI hydrogel, engineering the cascaded treatment procedure will provide an effective and practical paradigm for the treatment and recycling of heavy metal ions in the wastewater.

https://www.sciencedirect.com/science/article/pii/S2213343718307292