Sugihara, Matthew N. published the artcileTiO2-photocatalyzed transformation of the recalcitrant x-ray contrast agent diatrizoate, Recommanded Product: Diatrizoic Acid, the main research area is x ray contrast agent diatrizoate wastewater photocatalytic treatment; diatrizoate wastewater photocatalytic degradation advanced oxidation reductive dehalogenation.
Iodinated x-ray contrast media (ICM) are biol. recalcitrant chems. that are often detected in wastewater-impacted environments at higher concentrations than other pharmaceutical micropollutants of concern. Diatrizoate is an anionic ICM that is especially resistant to conventional wastewater and drinking water treatment processes. This study examined the aqueous photocatalytic treatment of diatrizoate using nanophase titanium dioxide (TiO2). Experiments demonstrated that diatrizoate can be degraded in aqueous TiO2 suspensions illuminated with UV-A light. In oxic solutions, diatrizoate degraded principally via oxidation by adsorbed OH radicals, releasing iodine substituents stoichiometrically, but causing little mineralization of organic C and N. Introduction of OH scavengers significantly slowed the rate of photocatalytic degradation At circumneutral pH, diatrizoate was oxidized much more slowly than iopromide, a nonionic ICM, in part because of unfavorable electrostatic interactions with the neg. charged TiO2 surface; increased rates of oxidation observed at lower pH conditions can be attributed to more favorable diatrizoate-TiO2 sorptive interactions. Experiments also demonstrated that diatrizoate was degraded at appreciable rates in anoxic solutions, and reductive dehalogenation products are identified by liquid chromatog.-mass spectrometry. The higher selectivity of reductive processes suggests a promising strategy for targeted treatment of recalcitrant ICM in organic-rich matrixes like wastewater effluent.
Applied Catalysis, B: Environmental published new progress about Mass spectra (of diatrizoate and transformation products). 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Recommanded Product: Diatrizoic Acid.
Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem