Pollutants such as pesticides have proven in many cases persistent to conventional secondary wastewater treatments, making necessary feasible alternatives. In this context, the photo-Fenton process is an effective choice. However, relatively high amortization cost makes difficult to spread this technology. In addition, total mineralization of contaminants is very difficult to achieve, so pollutant partial oxidation leads to the appearance of transformation products (TPs). Taking into account these facts, this work is aimed at the removal of two commercial pesticides, acetamiprid and thiabendazole, (100 �g/L each), by solar photo-Fenton in an extensive and affordable system �a raceway pond- at pilot plant scale. The study was made in tap water, simulated secondary effluent and real effluent with up to 15 cm liquid height and 360 L reactor volume. Additionally, TPs were monitored during the process in real effluent by liquid chromatography-triple quadrupole-linear ion trap-mass spectrometer (LC-QqLiT-MS/MS) analytical system. The high treatment capacity per surface area, expressed as mg/h m2, show the efficiency and feasibility of using raceway pond reactors for micropollutant removal with solar photo-Fenton. Figure 1. <img src='https://acs-archive-assets2.s3.amazonaws.com/mwrm/uploads/60583_shivakkkkk.jpg' alt='' />

Degradation of pesticides and monitoring of their transformation products in low cost raceway ponds by solar photo-Fenton

248th National Meeting (2014)

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