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| Distribution and risk assessment of sulfonamide antibiotics in soil from organic vegetable farms in Guangzhou |
| CHENG Yu-ting1, WU Xiao-lian1, XIANG Lei1, MO Ce-hui1, CAI Quan-ying1, LI Yan-wen1, LI Hui1, LI He-jian2, SU Qing-yun2 |
1. Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, School of Environment, Jinan University, Guangzhou 510632, China;
2. Dongguan Institute of Supervision and Testing for Agricultural Product Quality Safety, Dongguan 523086, China |
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Abstract Distribution and risk assessment of 8 sulfonamide antibiotics (SAs) in soils from different organic vegetable farms in Guangzhou were investigated in the present study. Results showed that all of the 8 SAs were widely detected in the soils (detection rate 3 94%), with the concentrations ranging from 0.73~973μg/kg. Among the SAs, SMZ and ST were the predominant compounds. Distributions and concentrations of the SAs varied in different organic vegetable farms and in soils grown different vegetables, root vegetables (average concentration 289μg/kg) > fruit vegetables (average concentration 143μg/kg) > leaf vegetables (average concentration 98.1μg/kg). In addition, the average concentrations of SAs in greenhouse soils (8.9μg/kg) were significantly lower than those in open-field soils (18.2μg/kg). Risk assessments showed that SMZ posed the highest ecological risks with more than 50% of soils over medium risks, followed by SD, SDM, and ST with 20%~50% of soils over medium risks. SM2, SM, and SPD posed relatively low ecological risk with 80% of soils under low risk. Compared with conventional vegetable farms in the Pearl River Delta, the detection rates and the concentrations of SAs in organic vegetable farms in Guangzhou were significantly higher.
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Received: 26 July 2016
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