Jiangsu Water Resources Bureau

Nanjing, China

Jiangsu Water Resources Bureau

Nanjing, China
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Zhang T.,Nanjing Hydraulic Research Institute | Guo X.,CAS Research Center for Eco Environmental Sciences | Liu J.,Jiangsu Water Resources Bureau | Chen Q.,Nanjing Hydraulic Research Institute | And 2 more authors.
Huanjing Kexue Xuebao/Acta Scientiae Circumstantiae | Year: 2017

By collecting samples in Meijiang Catchment of Jiangxi Province, an area with intensive poultry farming, this study investigated the spatial distribution of eleven tetracycline antibiotics (Tetracyclines, TCs) and analyzed the effect from different soil types and land use conditions on the concentrations of residual TCs in soil. The eleven antibiotics were extracted by solid phase extraction and detected by ultra-performance liquid chromatography tandem mass spectrometry. The result showed that the concentration of TCs ranged from 0 to 59.77 μg·kg-1. Oxtetracycline (OTC) was dominant in antibiotics with 100% detection rate at all sites and with relatively high concentrations. The total concentrations of eleven TCs were higher in upstream than downstream, whereas no significant correlation was observed between TCs concentration in soil and stocking density in each sub-basin. The total concentrations of eleven TCs in the three soil types ranked in the following order: red soil l>purple soil>paddy soils. The land use types were found to be an important factor affecting the concentrations of TCs. Total concentrations of eleven TCs were the highest in the tillage, followed by forestland, grassland, and others (urban land, etc.). The main degradation product of TC was EATC which caused highly potential ecological risk due to its high toxicity and concentration. © 2017, Science Press. All right reserved.

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