Abstract
In this study, the degradation of sulfonamide antibiotics was investigated through persulfate-enhanced UV advanced oxidation process. Factors that may affect the degradation efficiency were analyzed. Results showed that the persulfate imposed a significant enhancement on the UV oxidation process during the sulfathiazole degradation. The combined process of UV/persulfate can effectively remove about 96% of sulfathiazole within 60 min. With the increase in the dosage of persulfate, the removal efficiency increased as well. Different water matrix almost had no effect on the removal efficiency. Two intermediates were found during the sulfathiazole degradation. It can be predicted that the combined process of UV/persulfate has a broad application prospect for removing sulfonamide antibiotics in water treatment.
Highlights
In actual water, the environmental behavior of pharmaceuticals and personal care products (PPCPs), especially the existing level and source of antibiotics from them, are the hot spots and frontiers in ecotoxicology research around the world [1]
STZ was degraded by ultraviolet (UV), peroxodisulfates (PDS), and ultraviolet and peroxodisulfates process (UV/PDS) comSTZ was degraded by ultraviolet (UV), peroxodisulfates (PDS), and UV/PDS combined process, respectively
Could be removed by UV irradiation after 60 min. These results indicated that the removal could be removed by UV irradiation after 60 min. These results indicated that the removal efficiency of STZ by a single UV process or single PDS process was limited within 60 min
Summary
The environmental behavior of pharmaceuticals and personal care products (PPCPs), especially the existing level and source of antibiotics from them, are the hot spots and frontiers in ecotoxicology research around the world [1]. Among these PPCPs, sulfanilamide antibiotics (SAs) have attracted much attention due to their widespread usage in human medical treatment, animal husbandry, and aquaculture, and have entered the environment through industrial and domestic sewage discharge [2,3]. It is a hot topic of current concern and research to realize the degradation of these emerging pollutants quickly and effectively
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