The effects of solution matrices, i.e., pH, inorganic ions, and humic acids
, on the TiO2 photocatalytic degradation of 2-chlorobiphenyl (2-CB) were in
vestigated, A lower solution pH was found to be favorable for the degradati
on in the pH range of 3 to 11, Chloride ions showed no rate effect at pH 10
, The inhibition by chloride ions at pH 4 was more than that at pH 7, Carbo
nate/bicarbonate showed an inhibition effect on the degradation at pH 10 an
d pH 11, Magnesium ions inhibited the degradation under alkaline conditions
, but showed no rate effect at pH 4, Humic acids were found to inhibit 2-CB
degradation, The degradation rate decreased with increasing concentration
of humic acid and leveled off at the concentration of 5 mu g/mL.