Surface water contamination in southern Brazil by pharmaceutical compounds: application in a high anthropic pressure context
Visualizar/ Abrir
Data
2021-07-23Primeiro coorientador
Labanowski, Jérôme
Primeiro membro da banca
Bastos, Marília Camotti
Segundo membro da banca
Frazzon, Ana Paula Guedes
Terceiro membro da banca
Tiecher, Tales
Quarto membro da banca
Mondamert, Leslie
Metadata
Mostrar registro completoResumo
Medium-sized urban agglomerations have experienced huge population growth in recent decades. The absence of a master plan and environmental planning and / or the lack of control of space occupation have been destroying the few green spaces and environmental protection. The deodernized occupation of space, the lack of collection and the treatment of sewage are standards and not exception. In addition, another problem faced in Brazil is the deficiency in the collection and treatment of hospital waste. In this sense, the present project proposes the monitoring of the presence of pharmaceutical compounds in the water and biofilms in the water courses of the Campus of the Federal University of Santa Maria. Among the sources of pollution are: (a) the domestic sewage of houses and industries in the Camobi neighborhood, (b) the domestic sewage of the University Students' House, (c) effluents from the University Hospital and (d) effluents of the Veterinary Hospital. We developed 4 studies: a first preliminary study to characterize the biofilm collections, the second was to monitor the contamination status of the campus, the third was to perform a resilience experiment to verify the speed of decontamination of the biofilms, and the fourth was to evaluate the drug depuration capacity of a WWTP (Wastewater Treatment Plants). This study shows for the first time the impact of a university campus on the environment. The area of the Santa Maria campus appears to be contaminated by different types of pharmaceuticals, with concentrations of more than 900 ng g-1 in biofilms and more than 800 ng g-1 in POCIS (Polar Organic Chemical Integrative Sampler). The anticancer drugs epirubicin, the stimulant caffeine and the antibiotic erythromycin presented a medium and high risk for aquatic biota. This experiment highlights how the resilience of a river biofilm is a fast phenomenon since it is already noticeable after 8 hours and leads to a dissipation of two-thirds of the compounds (>95% dissipation) after 8 days. The present work shows that a small WWTP succeed to eliminate a significant part of the pollution load present in domestic wastewater, such as more than 60% of total solids, chemical oxygen demand and biochemical oxygen demand, and 45% of total nitrogen, but has low efficiency in removing pharmaceutical compounds.
Coleções
Os arquivos de licença a seguir estão associados a este item: