A Water-Based Synthesis of Hybrid Silica/Hyperbranched Poly(ethylene imine) Nanopowder for Heavy Metal Sorption from Aqueous Solutions

Table 1

Comparison of the maximum adsorption capacity of the as-synthesized SiO₂/HBPEI-0.16 material to the capacities of other adsorbents referred in literature.

Adsorbent	Adsorption capacity (mg/g)			Reference
	Pb(II)	Cu(II)	Zn(II)
Organic/inorganic hybrid silica nanospheres	632.9	—	—	[16]
PEI-modified biomass	204	92	—	[23]
Xanthate-modified magnetic chitosan (XMCS)	76.9	34	20.8	[39]
Fe3O4 magnetic nanoparticles	166.1	126.9	43.4	[40]
Municipal solid mixed with green waste (MSGW)	196	36	24	[42]
Modified Pseudomonas Lk9-2P	480	210.2	—	[43]
Twice-mercerized sugarcane bagasse (MMSCB 2)	500	185.2	—	[44]
Hybrid SiO2/HBPEI-0.16	833.3	502.5	193.4	Present work