Banaschik, Robert published the artcileDegradation and intermediates of diclofenac as instructive example for decomposition of recalcitrant pharmaceuticals by hydroxyl radicals generated with pulsed corona plasma in water, SDS of cas: 117-96-4, the main research area is recalcitrant pharmaceutical diclofenac decomposition hydroxyl pulsed corona plasma wastewater; Advanced oxidation process; Hydroxyl radicals; Pharmaceutical residues diclofenac; Pulsed corona plasma; Water treatment.
Seven recalcitrant pharmaceutical residues (diclofenac, 17α-ethinylestradiol, carbamazepine, ibuprofen, trimethoprim, diazepam, diatrizoate) were decomposed by pulsed corona plasma generated directly in water. The detailed degradation pathway was investigated for diclofenac and 21 intermediates could be identified in the degradation cascade. Hydroxyl radicals have been found primarily responsible for decomposition steps. By spin trap enhanced ESR spectroscopy (EPR), ·OH-adducts and superoxide anion radical adducts were detected and could be distinguished applying BMPO as a spin trap. The increase of concentrations of adducts follows qual. the increase of hydrogen peroxide concentrations Hydrogen peroxide is eventually consumed in Fenton-like processes but the concentration is continuously increasing to about 2 mM for a plasma treatment of 70 min. Degradation of diclofenac is inversely following hydrogen peroxide concentrations No qual. differences between byproducts formed during plasma treatment or due to degradation via Fenton-induced processes were observed Findings on degradation kinetics of diclofenac provide an instructive understanding of decomposition rates for recalcitrant pharmaceuticals with respect to their chem. structure. Accordingly, conclusions can be drawn for further development and a first risk assessment of the method which can also be applied towards other AOPs that rely on the generation of hydroxyl radicals.
Journal of Hazardous Materials published new progress about Advanced wastewater treatment. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, SDS of cas: 117-96-4.
Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem