江西梅江流域土壤中四环素类抗生素的含量及空间分布特征

发布时间：2018-03-24 18:32

  本文选题：抗生素　切入点：四环素类　出处：《环境科学学报》2017年04期

【摘要】：选取养殖业发达的江西梅江流域,利用固相萃取和超高效液相色谱-质谱联用法测定土壤中11种四环素类(Tetracyclines,TCs)抗生素的污染水平,研究流域范围内土壤中TCs的空间分布特征,分析不同土壤类型及土地利用类型对土壤中残留TCs的浓度影响.结果表明,流域土壤中TCs浓度范围为0~59.77μg·kg-1,其中土霉素(Oxytetracycline,OTC)的检出率为100%,且浓度较高,是梅江流域TCs污染的主要组成成分.11种TCs总浓度(∑TCs)的空间分布特征主要表现为流域上游下游,且各子流域土壤中TCs浓度与相应的养殖密度并无显著关系.不同土壤类型中∑TCs浓度顺序为红壤紫色土水稻土,土地利用类型也是影响其浓度的重要因素,∑TCs浓度在耕地中最大,林地次之,草地相对较小,其他(城镇用地等)最小.四环素(TC)在迁移过程中的主要降解产物为4-差向脱水四环素(4-Epianhydrotetracycline,EATC),其环境毒性及浓度均高于母体,具有较高的潜在生态风险.
[Abstract]:Using solid phase extraction (SPE) and ultra-high performance liquid chromatography-mass spectrometry (HPLC-MS) to determine the contamination level of 11 tetracyclinestimes (TCs) antibiotics, the spatial distribution characteristics of TCs in soil were studied. The effects of different soil types and land use types on the concentration of residual TCs in soil were analyzed. The results showed that the concentration range of TCs in watershed soil was 59.77 渭 g / kg ~ (-1), and the detection rate of oxytetracycline OTCwas 100%, and the concentration was high. The spatial distribution of total TCs concentration (鈭，

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