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Denitrifying bioreactors are devices used to treat agricultural run-off in situ. It is usually a trench filled with wood chips. The bioreactors work very well for their main purpose, which is reducing the concentration of nitrates entering the environment. But agricultural run-off contains not only nitrates, but also significant amount of pesticides and their metabolites, veterinary pharmaceuticals, etc. Fate of five pesticides (metolachlor, metazachlor, tebuconazole, glyphosate and epoxiconazole) during denitrifi...