Synthesis of zirconia-immobilized copper chelates for catalytic decomposition of hydrogen peroxide and the oxidation of polycyclic aromatic hydrocarbons.
Chelating sorbents with diethylenetriaminepenta(methylene-phosphonic acid) (DTPMPA) and ethylenediaminetetraacetic acid ligands immobilized on zirconia matrix were prepared and subsequently saturated with Cu(II). All the Cu chelates catalyzed decomposition of H(2)O(2) yielding highly reactive hydroxyl radicals. All of them were also able to catalyze degradation of polycyclic aromatic hydrocarbons (anthracene, benzo[a]pyrene and benzo[b]fluoranthene). The most effective DTPMPA-based catalysts G-32 and G-35 (10 mg ml(-1) with 100 mmol H(2)O(2)) caused almost complete decomposition of 15 ppm anthracene and benzo[a]pyrene during a five day catalytic cycle at 30 degrees C. Anthracene-1,4-dione was the main product of anthracene oxidation by all catalysts. The catalysts were active in several cycles without regeneration.
Baldrian
Petr
P
Institute of Microbiology of the ASCR, v.v.i., Vídenská 1083, 14220 Prague 4, Czech Republic. baldrian@biomed.cas.cz
Merhautová
Vera
V
Cajthaml
Tomás
T
Nerud
Frantisek
F
Stopka
Pavel
P
Gorbacheva
Olga
O
Hrubý
Martin
M
Benes
Milan J
MJ
D002614:Chelating Agents / Q000138:chemical synthesis* / Q000737:chemistry; D003300:Copper / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D015394:Molecular Structure; D010084:Oxidation-Reduction; D011084:Polycyclic Aromatic Hydrocarbons / Q000737:chemistry*; D015040:Zirconium / Q000737:chemistry*
D002614:Chelating Agents; D011084:Polycyclic Aromatic Hydrocarbons; D003300:Copper; D006861:Hydrogen Peroxide; D015040:Zirconium; C028541:zirconium oxide