Evaluation of a coupled system of electro-oxidation and ozonation to remove the pesticide Thiodan® 35 CE (endosulfan) in aqueous solution

This research shows the results of the coupling of two advanced oxidation processes for the degradation of pesticide Thiodan((R)) in water. Electrooxidation process with diamond electrodes doped with boron (BDD) alone removed 97% of COD in 100 min of reaction time. Furthermore, the process of ozonation only removed 77% removal of COD, in the same reaction time. However, when the processes are coupled, the % COD removal was achieved 95% with 40 min reaction time and the TOC decreased a 94%. With the coupled process practically the COD and TOC of the solution of Thiodan((R)) was removed and MICROTOX (R) test showed that after 30 min of reaction the sample was not exhibit toxicity. The cyclic voltammograms obtained with the coupled process, indicate the oxidation of Thiodan((R)). (C) 2016 Elsevier Ltd. All rights reserved.