广州市北郊蔬菜基地土壤四环素类抗生素的残留及风险评估

朱秀辉; 曾巧云; 解启来; 丁丹; 茹淑玲

文章摘要

朱秀辉,曾巧云,解启来,丁丹,茹淑玲.广州市北郊蔬菜基地土壤四环素类抗生素的残留及风险评估[J].农业环境科学学报,2017,36(11):2257-2266.

广州市北郊蔬菜基地土壤四环素类抗生素的残留及风险评估

Residues and risk assessment of tetracycline antibiotics in vegetable-growing soils from suburban areas of northern Guangzhou

投稿时间：2017-04-12

DOI：10.11654/jaes.2017-0549

中文关键词: 抗生素土壤污染广州市北郊蔬菜基地风险评估

英文关键词: antibiotic soil pollution suburban district of north Guangzhou City vegetable production farms risk assessment

基金项目:国家自然科学基金项目（41471215）；广东省科技计划项目（2016A020210107）

作者	单位	E-mail
朱秀辉	华南农业大学资源环境学院, 广州 510642
曾巧云	华南农业大学资源环境学院, 广州 510642	qiaoyunzeng@126.com
解启来	华南农业大学资源环境学院, 广州 510642
丁丹	华南农业大学资源环境学院, 广州 510642
茹淑玲	华南农业大学资源环境学院, 广州 510642

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中文摘要:

为了解蔬菜基地土壤中四环素类抗生素的残留及风险状况，采集了广州市北郊20个蔬菜基地30个土壤样品，利用固相萃取（SPE）-高效液相色谱-串联质谱（HPLC-MS/MS）分析方法，检测土壤中四环素类抗生素（四环素、土霉素和金霉素）的残留状况，并引入层次分析法、风险商值法和指示克里金法，分析研究区域土壤抗生素的主要来源、生态风险以及空间分布。结果表明，广州市北郊蔬菜基地土壤四环素（Tetracycline，TC）、土霉素（Oxytetracycline，OTC）和金霉素（Chlorotetracycline，CTC）的含量范围分别为ND~30.37 μg·kg^-1、ND~903.13 μg·kg^-1和ND~103.02 μg·kg^-1，其平均值分别为5.64、38.39 μg·kg^-1和8.92 μg·kg^-1，3种TCs在土壤中的平均含量高低顺序为：OTC > CTC > TC。粪肥是土壤3种TCs的主要来源，其贡献率大于50%；其次是商业性有机肥，其权重系数为24%左右。广州市北郊蔬菜基地土壤中3种TCs的生态风险整体较低，但西部部分区域处于中、高风险等级，首要防控污染物为OTC，其次是CTC。

英文摘要:

From 20 different vegetable-growing farms in suburban areas of northern Guangzhou city, 30 soil samples were collected.They were analyzed for the contents of three different tetracycline-based antibiotics:tetracycline(TC), oxytetracycline(OTC), and chlorotetracycline(CTC), using a solid phase extraction(SPE) method and high performance liquid chromatography-tandem mass spectrometry(HPLC-MS/MS). The results showed that the concentrations ranged between ND~30.37(mean:5.64), ND~903.13(mean:38.39), and ND~103.02(mean:8.92) μg·kg^-1 for TC, OTC, and CTC, respectively. Source analysis using an analytic hierarchy procedure indicated that manure used for growing vegetables was the principle source, accounting for more than 50% of the three antibiotics, whereas commercial organic fertilizers were the secondary source, accounting for 24%. Risk assessment using a combined approach of risk quotients and Kriging showed that the three antibiotics have low risks, with a few hotspots located in the western part of the studied area, where OTC possessed the highest risk, followed by CTC.

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