Oxytetracycline is one of the most common tetracyclines and is widely used in animal husbandry.Large-scale aquaculture enterprises discharge wastewater up to standard,antibiotic concentration is not a mandatory index,may harm the surface water ecosystem.At present,there are deficiencies in the formulation of antibiotic water quality standards in China,and there are few studies on oxytetracycline standard limits,oxytetracycline concentrations,and ecological risk assessment in the Huaihe River Basin,and no relevant research on water quality benchmarks has been carried out with the goal of protecting aquatic organisms in the basin.In this study,based on the acute toxicity data of 11 species in 9 families and 6 phyla,including Phyllum magnum,carp and common hydroid,the short-term water quality benchmark of oxytetracycline freshwater organisms was 92.52 μg/L,based on the chronic toxicity data of 10 families and 6 phyla,including Fuzzy Reticulata,Brachiocorbata rotifer,Dioma macrovis,Tetracyclia tetracycla,and Hydra vulgaris,the long-term water quality benchmark of oxytetracycline freshwater organisms was 75.85 μg/L,the recommended long-term water quality benchmark of oxytetracycline was 75.85 μg/L was used as the standard value of oxytetracycline in the Huaihe River Basin.The results of ecological risk assessment showed that oxytetracycline did not pose a threat to the integrity of river organisms at the Huaihe River Basin,but the mean value of oxytetracycline in the water environment in developed animal husbandry areas was significantly high,so it was necessary to increase the detection and control of oxytetracycline in the waters near the outlets of aquaculture enterprises or in the dry season of rivers and other seasons with small dilution,so as to reduce the impact on the integrity of aquatic organisms.
关键词
土霉素/淮河流域/水生生物基准/急慢性毒性/生态风险评估
Key words
Oxytetracycline/Huaihe River Basin/aquatic biological benchmarks/acute and chronic toxicity/ecological risk assessment
维普
万方数据