Estudio de la Degradación de Sulfametoxazol Mediante el Sistema UV/H2O2/Cl2 y Aproximación a la Determinación de sus Productos de Degradación por UHPLC/MS
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Date
2022-12-13
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Universidad Antonio Nariño
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http://purl.org/coar/resource_type/c_7a1f
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Abstract
Pharmaceutically active compounds correspond to a type of pollutants that are currently
detected with great frequency in the aquatic environment. Antibiotics specifically represent an
additional risk by contributing to the emergence of resistant bacteria. In this work, the efficiency of an
electrochemically assisted UV/H2O2/Cl2 system in a flow cell with a dimensionally stable anode and a
gas diffusion cathode, under UV radiation (light emitting diode) in the degradation of
Sulfamethoxazole, is studied. an antibiotic frequently consumed and detected in surface, waste,
hospital and irrigation waters. The influence of parameters such as current density on the production
of oxidants and the degradation of Sulfamethoxazole was evaluated. The results show a total
degradation of the compound after two minutes of treatment with a maximum mineralization of 35%
in thirty minutes. Calculations of energy consumption are made, observing a better efficiency with
75mA/cm2
(0.039kWh/L) compared to 150mA/cm2
(0.060kWh/L). Finally, the possible degradation
products obtained by UHPLC/ESI-tqMS were followed up, for which their chemical structures and
possible oxidation mechanisms with the reactive and electro-generated species in the system are
proposed.