Lis, AngelaGladchi, VioricaBunduchi, Elena2024-03-262024-03-262024LIS, Angela, GLADCHI, Viorica, BUNDUCHI, Elena. Transformări fotochimice ale izoniazidei în mediul acvatic. In: Integrare prin cercetare și inovare: conferința științifică națională cu participare internațională. Ştiinţe ale naturii și exacte, 9-10 noiembrie 2023. CEP USM, 2024, pp. 521-529. ISBN 978-9975-62-690-3.978-9975-62-690-3https://msuir.usm.md/handle/123456789/14608The main purpose of this research is to study the photochemical transformations of isoniazid (InH) and its influence on aquatic ecosystems. The spectrophotometric method was used to determine the kinetic parameters of the InH photodegradation. as a result of the research, it was found that InH undergoes direct and induced non-catalytic and catalytic photolysis. Based on the half-life parameter, it was found that InH undergoes photodegradation most quickly in non-catalytic indirect photolysis, then in catalytic, and fnally very slowly in direct photolysis. If the results obtained on the model systems are transferred to natural aquatic systems, it can be highlighted that the InH half-life will be 7-8 min. as a result, it was established that InH has negative effects on aquatic ecosystems. It consumes oxidative particles, especially OH radicals, which maintain aquatic systems’ self-purifcation capacity. It also binds Cu(II) ions in complexes with lesser catalytic activity.rofotoliză directăfotoliză indusăizoniazidăsisteme acvaticeArticle