ABSTRACT
The spherical granular activated carbon-carbon composites (GAC-Fe) with different iron oxide contents (Fe mass% = 0.6-10) were prepared by a pore volume impregnation method. The X-ray diffraction (XRD), scanning electron microscopy (SEM), and N2-adsorption results confirm the presence of amorphous iron oxide, pyrolytic carbon, and graphitized globular carbon nanoparticles covered with amorphous carbon in the CAG-Fe. The rate of photodegradation of methylene blue (MB) in aqueous solution under UV light in the presence of oxalic acid correlates with porosity of the prepared materials. The total MB removal includes the combination of adsorption and photodegradation without the addition of H2O2. The results of total organic carbon (TOC) analysis reveal that the decolorization of MB in aqueous solution containing oxalic acid corresponds to the decomposition of organic compounds to CO2 and H2O.
Subject(s)
Carbon Compounds, Inorganic/chemistry , Ferric Compounds/chemistry , Methylene Blue/isolation & purification , Oxalic Acid/chemistry , Adsorption , Carbon/chemistry , Charcoal/chemistry , Hydrogen Peroxide/chemistry , Microscopy, Electron, Scanning , Photolysis/radiation effects , Porosity , Ultraviolet Rays , X-Ray DiffractionABSTRACT
In the title compound, (C(13)H(15)N(2)O)(2)[ZnCl(4)], also known as di(harmalinium) tetra-chloridozincate, the Zn(II) atom is in a distorted tetrahedral coordination of the chlorido ligands. In the cation, the meth-oxy and methyl groups are both coplanar with with rings to which they are attached [maximum deviations of 0.232â (4) and 0.259â (4)â Å, respectively]. In the crystal, the alkaloid cations and metal complex anions inter-act by way of N-Hâ¯Cl hydrogen bonds involving each Cl atom, resulting in a network structure.