which exhibitedexcellent sorption performances as compared with
other advanced adsorbents in wastewater treatment [1–6]. For
example, magnesium silicate nanotubes were synthesized, using
SiO2 tubes as the template and silicon source, and showed maximum
adsorption capacities of 929 mg/g for UO2
2+ and 276 mg/g
for methylene blue (MB) [1]. An urchin-like zinc silicate had a surface
area of 236 m2/g as well as an adsorption capacity of 210 mg/g
for Pb2+ [7]. A sandwich-like magnesium silicate/reduced graphene
oxide was synthesized by a hydrothermal approach, and the maximum
adsorption capacities were 433 and 416 mg/g for MB and
Pb2+, respectively [8]