Estudio del proceso de oxidación avanzada UV/H2O para la remoción de fármacos a partir de aguas residuales
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Date
2026
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Universidad de Concepción
Abstract
El presente trabajo tiene como objetivo estudiar el proceso de oxidación UV/H2O2 para el tratamiento de soluciones acuosas modelos contaminadas individualmente con ibuprofeno, naproxeno sódico y paracetamol. La metodología consistió en implementar un sistema UV/H2O2 y exponer las soluciones modelo al tratamiento durante dos horas, evaluando la degradación obtenida para tres dosis diferentes de peróxido de hidrógeno (111, 222 y 333 ppm). La cuantificación de los fármacos se realizó mediante espectrofotometría UV, elaborando previamente las curvas de calibración válidas para cada compuesto. Los resultados obtenidos mostraron altas eficiencias de remoción en paracetamol y naproxeno sódico, con valores cercanos al 95%, mientras que el ibuprofeno presentó remociones entre el 78% y 85%, evidenciando una mayor resistencia a la oxidación. En conjunto, estos resultados demostraron que el proceso UV/H2O2 es una alternativa eficaz para remover estos fármacos bajo condiciones controladas de laboratorio. No obstante, los fenómenos visuales producidos durante los ensayos sugieren la formación de subproductos intermedios, por lo que se recomienda profundizar su identificación mediante técnicas analíticas de mayor resolución.
The present work aims to study the UV/H2O2 oxidation process for the treatment of model water solutions individually contaminated with ibuprofen, naproxen sodium and paracetamol. The methodology consisted of iimplementing a UV/H2O2 system and exposing the model solutions to treatment for two hours, evaluating the degradation obtained for three different doses of hydrogen peroxide (111, 222 and 333 ppm). The quantification of the pharmaceuticals was carried out by UV spectrophotometry, and the calibration curves valid for each compound were prepared in advance. The results obtained showed high removal efficiencies for paracetamol and naproxen sodium, with values close to 95%, while ibuprofen presented removals between 78% and 85%, showing a higher resistance to oxidation. Taken together, these results demonstrated that the UV/H2O2 process is an effective alternative for removing these drugs under controlled laboratory conditions. However, the visual phenomena produced during the tests suggest the formation of intermediate by-products, so it is recommended to further their identification through analytical techniques of higher resolution.
The present work aims to study the UV/H2O2 oxidation process for the treatment of model water solutions individually contaminated with ibuprofen, naproxen sodium and paracetamol. The methodology consisted of iimplementing a UV/H2O2 system and exposing the model solutions to treatment for two hours, evaluating the degradation obtained for three different doses of hydrogen peroxide (111, 222 and 333 ppm). The quantification of the pharmaceuticals was carried out by UV spectrophotometry, and the calibration curves valid for each compound were prepared in advance. The results obtained showed high removal efficiencies for paracetamol and naproxen sodium, with values close to 95%, while ibuprofen presented removals between 78% and 85%, showing a higher resistance to oxidation. Taken together, these results demonstrated that the UV/H2O2 process is an effective alternative for removing these drugs under controlled laboratory conditions. However, the visual phenomena produced during the tests suggest the formation of intermediate by-products, so it is recommended to further their identification through analytical techniques of higher resolution.
Description
Tesis presentada para optar al título de Ingeniero Ambiental
Keywords
Aguas residuales, Oxidación, Residuos -- Eliminación, Medicamentos -- Análisis