Topics in Current Chemistry (2020) 378:29
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of oxidizing radicals [56]. The data shown in Fig. 13 in terms of the observed rate
constants clearly establish the synergy for the combined operation. The data also
confirm the utility of the catalyst in enhancing the rate of degradation, especially
in the ultrasound-assisted approach. It was also reported in this study that ofloxacin
degradation efficacy could be improved with addition of the H 2 O 2 and that the optimum level was 0.14 mM/L for the best results.
The observed effects for the combination can be strongly dependent on the
operating conditions, which determine the rate of utilization of the generated
Fig. 12 Data on variation of the kinetic rate constant (K) with Au–TiO 2 loading for the SPC (filled diamonds), sonocatalytic (filled triangles) and photocatalytic (filled circles) degradation of the herbicide
simazine. Reproduced from Sathishkumar et al. [96]
Fig. 13 Data for the effect of the treatment process on the degradation of ofloxacin (OFX). Data reproduced from Hapeshi et al. [56]
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Reprinted from the journal