Adsorption of aqueous metal ions on oxygen and nitrogen functionalized nanoporous activated carbons.

摘要: In this study, the adsorption characteristics of two series oxygen and nitrogen functionalized activated carbons were investigated. These a low content (∼1 wt % daf) carbon derived from coconut shell high (∼8 polyacrylonitrile. both series, contents varied over range ∼2−22 daf. The porous structures characterized using N2 (77 K) CO2 (273 adsorption. Only minor changes in structure observed series. This allowed effect functional group concentrations on metal ion to be studied without major influences due differences characteristics. surface examined by Fourier transform infrared (FTIR) spectroscopy, acid/base titrations, measurement point zero charge (pHPZC). aqueous species, M2+(aq), acid...