Enrichment of deoxynivalenol and establishment of online early warning treatment system for drinking water

Abstract

AbstractAn online monitoring and early warning system was established to detect drinking water pollution from deoxynivalenol (DON). Flow injection chemiluminescence was selected as online monitoring tool for its low detection limit, fast detection process and broad linear range. The toxigenic strain of Fusarium graminearum (GDMCC3.507, freeze‐dried powder) was incubated and grown on potato dextrose agar (PDA) culture medium under constant temperature of 26 °C for 5 days. Different culture conditions were investigated to determine the most suitable conditions to culture the fungi and enrich DON that produced by Fusarium graminearum. Powder activated carbon (PAC) was used to remove DON in drinking water. A dynamic threshold X ± 5SD was established to detect DON in drinking water effectively. Calculation of standard curve indicated that 6 mg DON could be easily extracted from 100 mg corn culture medium. Emergency detoxification was achieved by PAC and the removal rate reached 76% after 50 min of adsorption process. Once the chemiluminescence intensity exceeded the X ± 5SD value of the exact point during the monitoring process, the tap water was estimated to have excessive toxin. The establishment of this emergency system could provide a basis for dealing with sudden pollution of drinking water.