РАЗЛОЖЕНИЕ ДИКЛОФЕНАКА В ВОДНОМ РАСТВОРЕ В ПЛАЗМЕ ДИЭЛЕКТРИЧЕСКОГО БАРЬЕРНОГО РАЗРЯДА
Аннотация
Загрязнение окружающей среды фармацевтическими препаратами является серьезной экологической проблемой. Особую опасность представляет загрязнение водных объектов. В данном исследовании приводятся данные по окислительной деструкции диклофенака, присутствующего в водных растворах, при действии на них диэлектрического барьерного разряда (ДБР, 50 Гц) атмосферного давления в потоке кислорода и раствора. Диапазон исследованных концентраций составлял от 12,3 мкмоль/л до 61,5 мкмоль/л, а мощность, вкладываемая в разряд, была равна 9,8 Вт. Время контакта раствора с зоной разряда варьировалось в диапазоне от 1,7 до 7,3 с, а расход кислорода составлял 3 см3/с. Показано, что кинетика разложения диклофенака подчиняется уравнению первого кинетического порядка. Найденные кажущиеся константы скорости уменьшались с ростом концентрации от 0,84 до 0,32 с-1. При этом энергетическая эффективность разложения расла от 2,7∙10-3 до 4∙10-3 разложившихся молекул на 100 эВ вложенной энергии, а степень разложения достигала 90%. Было обнаружено, что в результате разложения диклофенака образуются карбоновые кислоты и альдегиды. Исследование кинетики образования этих веществ показало, что альдегиды являются промежуточными продуктами, а кислоты – конечными. Доля этих веществ в продуктах падает от 80% до 48% с ростом начальной концентрации диклофенака. Поскольку молекула диклофенака содержит атомы хлора и вторичную аминную группу (-NH-), при разложении в растворе появляются ионы Cl-, а также нитрит (NO2-) и нитрат (NO3-) ионы. Кинетика образования этих ионов была также определена.
Для цитирования:
Извекова А.А., Соколова П.О., Квиткова Е.Ю., Рыбкин В.В., Гущин А.А. Разложение диклофенака в водном растворе в плазме диэлектрического барьерного разряда. Изв. вузов. Химия и хим. технология. 2026. Т. 69. Вып. 5. С. 44-53. DOI: 10.6060/ivkkt.20266905.7070.
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