In order to improve the stability of silicon-based heavy metals adsorbents and reduce ions release (Zn, Mg, etc) in the ion exchange process, a novel adsorbent with excellent heavy metal adsorption was synthesized by loading sodium isobutyl xanthate (SIBX) onto the surface of silicon-zinc mesoporous (SZM) material. For comparison, two silicon-zinc materials using silicate (Na2SiO3, inorganic silicon) and tetraethyl orthosilicate (C8H20O4Si, organic silicon) were synthesized separately. Among them, inorganic silicon-zinc mesoporous (SZM-1) material was used to verify its ions exchange properties, organic silicon-zinc mesoporous (SZM-2) material acts as matrix and modified with SIBX. The copper sulfate solution was employed to evaluate the adsorption ability of as-prepared adsorbents. Above materials were characterized by a set of complementary techniques: SEM-EDS, XRD, TEM, BET, FT-IR, and XPS. The analyses prove that the SIBX can be attached to the surface of the SZM-2, the presence of SIBX can simultaneously immobilize Zinc atoms and adsorb Copper ions.
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