Current location: JICS Archive > Vol. 7 > No. 1 > Articles : 14

The Effects of Copper Ions on the Catalytic Degradation of Azo Dye Acid Chrome Dark Blue

J.W. Fan, X.H. Liu, Y.N. Huang and L.T. Pan*

College of Environmental Science and Engineering, Tongji University, Shanghai 200092, P. R. China

The effect of Cu²⁺ on the catalytic degradation of Acid chrome dark blue (ACDB) in UV-TiO₂ process and Fenton process was studied. In these two processes, Cu²⁺ markedly inhibited the degradation of ACDB. These inhibition effects had an obvious relationship with the concentration of Cu²⁺. The experimental results indicated that in pH 5.0 buffer solution, ACDB reacted with Cu²⁺ with the formation of new complex Cu(ACDB)₂. This interaction was favorable to protect some groups in ACDB from the oxidation of reactive oxygen species generated in UV-TiO₂ process and Fenton process, and consequently had suppressing effects on degradation of ACDB.

Keywords: Copper ions, Acid chrome dark blue, Photocatalytical degradation, Fenton-process