Preparation and chelation adsorption property of composite chelating material poly(amidoxime)/SiO2 towards heavy metal ions

A novel electrospun PVA/ZnO nanofiber adsorbent for U(VI), Cu(II) and Ni(II) removal from aqueous solution

“…Therefore, the potential of sorption for metal ions on the nanofiber adsorbent is in the order of U(VI) > Cu(II) > Ni(II). The capacity of sorption of metal ions on the nanofiber adsorbent is also compared with the capacities of other adsorbents reported in the literature [30,[33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48], the list of which is presented in Table 4. The Freundlich isotherm expresses sorption at multilayer and on energetically heterogeneous surface.…”

Recovery of uranyl from aqueous solutions using amidoximated polyacrylonitrile/exfoliated Na-montmorillonite composite

“…Nonetheless, both the adsorption capacity and adsorption rate are limited by the hydrophobicity of the amidoxime, and the weak mechanical strength also confines its application into a narrow field. In order to enhance the hydrophilic and mechanical properties, continuous attempts have been performed by grafting hydrophilic groups [3] or incorporating various inorganic mineral like SiO 2 [19] into polyacrylonitrile polymer, and showed significant effectiveness, because the hydrophilic moiety can favor the contact between adsorbent and uranyl ions [3].…”

Preparation of amidoxime surface-functionalized polyindole (ASFPI) nanofibers for Pb(ii) and Cd(ii) adsorption from aqueous solutions

“…14,15 Polypyrrole-coated electrospun nanober membranes have been reported for recovery of Au(III) from aqueous solution. [21][22][23][24] Therefore, it would be interesting to investigate the possibility of conducting polymer nanobers with amidoxime surface functionalization for metal ions adsorption. 17 Another method is to chemically bond the chelating functional groups such as amino, carboxyl, sulydryl and amidoxime onto the adsorbents surface.…”