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| Study on Antibiotic Pollution in Soils of Typical Vegetable Fields along an Urban-suburban Gradient in Guangzhou |
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| DOI：10.16768/j.issn.1004-874X.2019.06.009 |
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| Abstract: |
| 【Objective】 The study was conducted to explore the urban-suburban distribution characteristics of
soil antibiotic pollution in typical vegetable fields of Guangzhou, as well as the possible sources and influencing factors of
antibiotic contamination. 【Method】 Soils (0-20 cm) of three types of vegetable fields (rhizome vegetables, leaf vegetables,
melon and fruit vegetables) were sampled from Mangjiao in Haizhu district, Dongchong and Hengli in Nansha district along
an urban to suburban gradient in Guangzhou. The types and concentration of antibiotics were identified by using highperformance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). 【Result】A total of 5 categories of 12 antibiotics including sulfonamines (sulfamidine), quinolones (norfloxacin, pefloxacin, ofloxacin, enrofloxacin, ciprofloxacin),
tetracycline (tetracycline, doxycycline, oxytetracycline, chlortetracycline), penicillins (novobiocin), macrolides (oleandomycin)
were detected. 【Conclusion】 The results showed that the types and concentration of antibiotics were generally reduced
from the center of the city to the suburbs, and the urban-suburban distribution of antibiotics was also related to the type of
antibiotics. Among the three detected antibiotics - sulfamidine, doxycycline and oleandomycin, with a detection rate of 100%,
the concentration of oleandomycin showed a decreased trend from the center of the city to the suburbs, the concentration of
sulfamethamidine was almost the same, while the concentration of doxycycline increased from the the center of the city to the
suburbs. There were significant differences in the status of the antibiotic pollution in different vegetable fields, and there were
most types of antibiotics in Mangjiao of Haizhu District and the total concentration of antibiotics was the highest in this area. |
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