Research Article
A Water-Based Synthesis of Hybrid Silica/Hyperbranched Poly(ethylene imine) Nanopowder for Heavy Metal Sorption from Aqueous Solutions
Figure 6
Sorption isotherms of Pb2+, Cu2+, and Zn2+ by SiO2-HBPEI-0.16 (pH 6.2, contact time 24 h).