Keywords: Chemcatcher Systems: flow channel experimental hall Substances: diuron (XMTQQYYKAHVGBJ-UHFFFAOYSA-N) benzotriazole (QRUDEWIWKLJBPS-UHFFFAOYSA-N) 2.4-D (OVSKIKFHRZPJSS-UHFFFAOYSA-N) clarithromycin (AGOYDEPGAOXOCK-KCBOHYOISA-N)