The impact of background organic matter and alkalinity on the degradation of the pesticide metaldehyde by two advanced oxidation processes: UV/H2O2 and UV/TiO2

Improvement of Efficiency and Electrical Energy Consumption of AB74 Degradation Process using A Novel Cylindrical Batch Photochemical Reactor.

“…• OH) that would even mineralize refractory pollutants 8,10,11 . Different types of AOPs, such as UV/H 2 O 2 , UV/TiO 2 , and UV/H 2 O 2 /TiO 2 were successfully used to treat various pollutants in water [12][13][14][15][16][17] .…”

The effect of humic acids on the removal of atrazine from water in a continuous photocatalytic membrane reactor

“…A further increase of the ratio in favour of NOM led to greater inhibition of the pesticide degradation as a result of the reduced proximity of the pollutant to the surface of the catalyst (TiO 2 ). In the same work, the increase of alkalinity had a detrimental effect on metaldehyde degradation, which was reduced to 45% compared to the system without alkalinity, where 93% of the pesticide was degraded (Autin et al, 2013). Doll and Frimmel (2005a) reported that the presence of NOM promoted the solar UV-light photodegradation of the drugs carbamazepine, clofibric acid and iomeprol but inhibited the photocatalytic degradation in the presence of TiO 2 (Doll and Frimmel, 2005b).…”

“…The effect of the ionic strength, of the natural organic matter (NOM) and of other environmental parameters, such as pH and alkalinity, on organic micropollutant photocatalytic degradation has been addressed in several studies. For instance, Autin et al (2013) observed a reduction in the photocatalytic degradation rate of the pesticide metaldehyde by an average value of 13% and 38% for mole ratios of metaldehyde/background-NOM 1:10 and 1:100, respectively. A further increase of the ratio in favour of NOM led to greater inhibition of the pesticide degradation as a result of the reduced proximity of the pollutant to the surface of the catalyst (TiO 2 ).…”

The contribution of non-thermal and advanced oxidation technologies towards dissipation of pesticide residues

“…The effectiveness of ultraviolet light to degrade pesticides will be far less in turbid environments than in clear solutions (Autin, et al, 2013). …”