| 초록 |
With respect to the number and production volumes, azo-dyes are the largest group of colorants, constituting 60-70% of all synthetic dyes produced in the world. This study aims to develop carbon-basedPMAC/NMAC (PIMAC/NIMAC) - series activated carbons containing multiple functional groups for effectiveremoval of anionic and cationic azo-dyes,Reactive Violet 5R(anionic) and Rhodamine B(cationic),from aqueous media. Prior to dye adsorption, activated carbons (ACs) were oxidized usinghydrogen peroxide to obtain PMAC-H2O2, followed by modification with EDTA and Fe(NO3)3 to give PIMAC-EDTA and PIMAC-Fe(NO3)3. The obtained ACs were characterized by SEM,FT-IR, XRD, and BET analyses. The adsorption of dyes ontothe adsorbents wascarried outin batch adsorbers and the factors affecting the adsorption capacities of anionic and cationic dyes were investigated and discussed. All the experimental equilibrium data are correlated well with the Langmuir and Freundlich isotherms. |
