中文摘要：

对广东省江门市镇海湾红树林自然保护区两种优势红树植物——桐花树Aegiceras corniculatum、秋茄Kandelia candel的根域（根际土、非根际土）中氟喹诺酮类（Fluoroquinolones,FQs）抗生素展开分析。采用高效液相质谱联用法测定14个根域土样品、6个排污口沉积物和3个光滩沉积物样品中4种FQs—氧氟沙星（Ofloxacin,OFL）、诺氟沙星（Norfloxacin,NOR）、环丙沙星（Ciprofloxacin,CIP）、恩诺沙星（Enrofloxacin,ENR）的残留特征,并与根域土理化因子pH、有机质（Soil organicmatter,SOM）、阳离子交换量（Cationex changecapacity,CEC）、过氧化氢酶（Catalase,CAT）、蔗糖酶（Sucrase,SUC）、土壤有效态Cu、Zn、Fe进行典范对应分析（canonical correspondence analysis,CCA）。结果表明：桐花树、秋茄根际土中4种FQs质量分数均值分别为55.22、29.25μg·kg-1,非根际土中4种FQs均值分别为22.45、18.66μg·kg-1,两种红树根域中4种FQs含量桐花树〉秋茄（P〈0.05）,4种FQs含量均为根际土〉非根际土;对FQs残留影响程度的环境因子权重排序为：p H〉Fe〉SOM≥CEC〉Zn〉SUC≥CAT;研究结果对阐释红树林对有机污染物（包括抗生素）的吸收净化作用具有重要理论意义。

英文摘要：

This paper determines four Fluoroquinolones（ FQs） in the mangal root areas（ rhizosphere soil,non-rhizosphere soil） of two advantageous mangal communities [Aegiceras corniculatum（ Ac）,Kandelia candel（ Kc） ]in Zhenhai Bay Mangrove Nature Reserve in Jiangmen,Guangdong Province. Analysis of the residual characteristics of FQs-Ofloxacin（ OFL）,Norfloxacin（ NOR）,Ciprofloxacin（ CIP）,Enrofloxacin（ ENR） in sediments from fourteen mangal root areas,six discharge and three tidal flat were carried out by high performance liquid chromatogram-phymass spectrometry（ HPLC-MS） qualitatively and quantitatively. The canonical correspondence analysis（ CCA） analysis was used to analyze the relationship between the environmental factors（ p H,Soil organic matter（ SOM）,Cationex change capacity（ CEC）,Catalase（ CAT）,Sucrase（ SUC）,available heavy metals such as Cu,Zn,Fe） and FQs in magal root areas. The results showed that the average contents of FQs in two mangalrhizosphere soils are 55. 22,29. 25 μg·kg-1,respectively. The average contents of FQs in two mangal non-rhizosphere soils are 22. 45,18. 66 μg ·kg-1,respectively. FQs contents of Ac root areas are higher than that of Kc root areas（ P 0. 05）. FQs contents in two mangalrhizosphere soils root areas are higher than that of non-rhizosphere soils. The CCA analysis indicates that the sorting of environmental factors as： p H Fe SOM ≥ CEC Zn SUC ≥ CAT. The study results have important theoretical significance on interpretation of mangroves to the absorption and purification of organic pollutants（ including antibiotics）.