"Butanol recovery from a synthetic fermentation broth by vacuum distillation in rotating packed bed for improving the water reuse"
 Mineralization of tetracycline and ciprofloxacin by a denitrifying sludge
Yeny Ruth Banda SorianoDone
 Estimación de los volúmenes históricos de agua residual de la mega Ciudad de México hacia el Valle del Mezquital.
Ana Karen Hernández EspinosaDone
 Acondicionamiento de un reactor anaerobio acidogénico de flujo ascendente para la producción de sustancias poliméricas extracelulares
Omar Nevarez MoralesDone
 Desarrollo de un sistema de tratamiento portátil para aguas residuales domésticas
Miguel Angel Ibarra PalazuelosDone
 Impacto de la solución nutritiva en la propagación de Pitahaya (Hylocereus undatus) en invernadero
Aranza Hortencia Navarrete TorresDone
 FUENTES PUNTUALES DE CONTAMINACIÓN Y SU RELACIÓN CON LA MATERIA ORGÁNICA EN SEDIMENTOS SUPERFICIALES DE LA RESERVA ECOLÓGICA ARROYO MORENO, VERACRUZ.
Erika Michell Cazarín LunaDone
 Instrumentation of a semi-arid watershed to monitor the water cycle.
Pedro Antonio Padilla GonzálezDone
 Análisis de los efectos meteorológicos del cambio climático en Yucatán, México y sus posibles consecuencias en el suministro de agua.
Ricardo Adrián Mena PérezDone
 "YWP-México durante la pandemia por COVID-19. Un período de transición, retos y oportunidades"
Alfredo Javier Córdova LizamaDone
Dr. Durán-Álvarez is a young Mexican chemical engineer, holding a PhD in Environmental Engineering (2013). He has worked since 2006 in the field of the contaminants of emerging concern (CECs) through
Since early 2020, the COVID-19 pandemic has brough a series of challenges and lesson to be learnt, and with these trials new approaches have raised, like the wastewater-based epidemiology. In this work, we developed an analytical method based on HPLC-ESI-MS/MS to quantify in wastewater five pharmaceutical compounds used to cope with the symptoms of COVID-19, namely azithromycin, ivermectin, dexamethasone, famotidine and indomethacin. Sewage samples were collected at several points from Mexico City and the Mezquital Valley in a one-year monitoring campaign; also, natural water samples were taken in Mezquital Valley, where Mexico City’s wastewater infiltrates through soil to recharge the aquifer. Out of the five target compounds, azithromycin, ivermectin and dexamethasone were consistently detected in Mexico City’s wastewater, at levels of 100-250 ng/L. Concentration of famotidine and indomethacin were negligible in wastewater and natural water samples. The concentration profile of the pharmaceuticals matched well with the number of positive cases in Mexico City, suggesting that they can be as a surveillance approach to follow the spread of the disease in Mexico City, now that sense of thereat has diminished. For wastewater samples taken in Mezquital Valley, the concentration of dexamethasone was below the limit of detection of the analytical technique, which was attributed to dilution effect and possibly degradation in wastewater. The concentration of azithromycin and ivermectin was drastically reduced by the infiltration of wastewater through soil, pointing out the importance of soil to remove these pollutants via biotic and abiotic processes.