In this respect, results from the degradation of oxalic acid by
photocatalytic ozonation showed that increasing temperature
from 10 C to 55 C increased the removal rate of oxalic acid from
water, while higher temperatures up to 70 C had a negative effect
and reduced the degradation rate compared to that observed at
55 C [33]. A similar effect was observed by Giri et al. [72] where
the degradation rate constants for solutions of 2,4-dichlorophenoxyacetic acid at 10, 20 and 30 C were 2.65, 3.35 and 2.25 h
1
,
respectively. Decomposition of dichloroacetic acid increased from
0.294 mM/h to 0.633 mM/h as the solution temperature was
increased from 10 C to 70 C