| 초록 |
Recently, metal pollution is currently a serious environmental issue. Especially, chromium (Cr) in aqueous media is mainly present in two stable oxidation states of Cr(VI) and Cr(III). Cr(VI) is typically found as anionic chromates (CrO2−4 , HCrO−4 , or Cr2O2−7 ), which are regarded as highly toxic, mutagenic, and carcinogenic. In contrast, Cr(III) is relatively nontoxic and trace amounts of Cr(III) are considered an essential nutrient for humans and other organisms. For this reason, the simple and efficient removal of Cr(VI) from water is of great importance. In this study, we prepared Pd nanoparticles decorated activated carbon by introducing thiol groups on activated carbon surfaces. The samples were characterized by Auger electron spectroscopy (AES), X-ray diffraction (XRD), and scanning electron microscope (SEM). The reduction of hexavalent chromium is also investigated by ultraviolet-visible (UV-vis) measurement. |
