In 2019,Environmental Science and Pollution Research included an article by Pinheiro da Costa, Elizangela; Bottrel, Sue Ellen C.; Starling, Maria Clara V. M.; Leao, Monica M. D.; Amorim, Camila Costa. Synthetic Route of C7H7N3. The article was titled 《Degradation of carbendazim in water via photo-Fenton in Raceway Pond Reactor: assessment of acute toxicity and transformation products》. The information in the text is summarized as follows:
This study aimed at investigating the degradation of fungicide carbendazim (CBZ) via photo-Fenton reactions in artificially and solar irradiated photoreactors at laboratory scale and in a semi-pilot scale Raceway Pond Reactor (RPR), resp. Acute toxicity was monitored by assessing the sensibility of bioluminescent bacteria (Aliivibrio fischeri) to samples taken during reactions. In addition, byproducts formed during solar photo-Fenton were identified by liquid chromatog. coupled to mass spectrometry (UFLC-MS). For tests performed in lab-scale, two artificial irradiation sources were compared (UVλ>254nm and UV-Visλ>320nm). A complete design of experiments was performed in the semi-pilot scale RPR in order to optimize reaction conditions (Fe2+ and H2O2 concentrations, and water depth). Efficient degradation of carbendazim (> 96%) and toxicity removal were achieved via artificially irradiated photo-Fenton under both irradiation sources. Control experiments (UV photolysis and UV-Vis peroxidation) were also efficient but led to increased acute toxicity. In addition, H2O2/UVλ>254nm required longer reaction time (60 min) when compared to the photo-Fenton process (less than 1 min). While Fenton’s reagent achieved high CBZ and acute toxicity removal, its efficiency demands higher concentration of reagents in comparison to irradiated processes. Solar photo-Fenton removed carbendazim within 15 min of reaction (96%, 0.75 kJ L-1), and monocarbomethoxyguanidine, benzimidazole isocyanate, and 2-aminobenzimidazole were identified as transformation products. Results suggest that both solar photo-Fenton and artificially irradiated systems are promising routes for carbendazim degradation1H-Benzo[d]imidazol-2-amine(cas: 934-32-7Synthetic Route of C7H7N3) was used in this study.
1H-Benzo[d]imidazol-2-amine(cas: 934-32-7) can be used in the hydrolysis of a choline carbonate. It was also used in the synthesis of imidazo[1,2-a]benzimidazoles.Synthetic Route of C7H7N3
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem