| 喹诺酮类抗生素在城市典型水环境中的分配系数及其主要环境影响因子 |
| 摘要点击 1824 全文点击 675 投稿时间：2021-10-13 修订日期：2022-01-13 |
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| 中文关键词 城市水环境 喹诺酮类(QNs)抗生素 时空分布特征 分配系数 环境因子 |
| 英文关键词 urban aquatic environment quinolones (QNs) antibiotics characteristics of spatial and temporal distribution distribution coefficient environmental parameters |
| 作者 | 单位 | E-mail | | 剧泽佳 | 河北科技大学环境科学与工程学院, 石家庄 050000 | juzejia94@163.com | | 付雨 | 河北科技大学环境科学与工程学院, 石家庄 050000 | | | 赵鑫宇 | 河北科技大学环境科学与工程学院, 石家庄 050000 | | | 陈慧 | 河北科技大学环境科学与工程学院, 石家庄 050000 | | | 宋圆梦 | 河北科技大学环境科学与工程学院, 石家庄 050000 | | | 赵波 | 河北科技大学环境科学与工程学院, 石家庄 050000 | | | 张纪媛 | 河北科技大学环境科学与工程学院, 石家庄 050000 | | | 卢梦淇 | 河北科技大学环境科学与工程学院, 石家庄 050000 | | | 崔建升 | 河北科技大学环境科学与工程学院, 石家庄 050000
河北省污染防治生物技术实验室, 石家庄 050000 | | | 张璐璐 | 河北科技大学环境科学与工程学院, 石家庄 050000
河北省污染防治生物技术实验室, 石家庄 050000 | zhanglulu19850703@163.com |
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| 中文摘要 |
| 沉积物作为抗生素在水环境中的主要赋存介质，越来越多的研究关注抗生素在水体-沉积物中的分配行为；但此前研究多基于实验室模拟，而在自然水环境中抗生素的分配行为及其与环境因子相关性研究则较少关注.鉴于此，以石家庄市地表水和沉积物为研究对象，采用超高效液相色谱串联质谱法（HPLC-MS）分析石家庄水环境中喹诺酮类（QNs）抗生素的时空分布特征，计算其在水和沉积物中的分配系数，并确定自然水环境中分配系数的主要环境影响因子.结果表明：①在石家庄市水体和沉积物中QNs含量分别为8.0~4.4×103 ng·L-1和16~2.2×103 ng·g-1，其中恩诺沙星（ENR）和氧氟沙星（OFL）分别是水体和沉积物中主要的QNs抗生素；②石家庄市水体中QNs总含量呈现12月（1.0×104 ng·L-1）大于4月（5.5×103 ng·L-1）的趋势，沉积物中QNs亦呈现12月（7.8×103 ng·g-1）大于4月的趋势（6.2×103 ng·g-1）；③石家庄市水环境中QNs抗生素的分配系数变化范围为34~2.9×105 L·kg-1，且呈现12月大于4月的趋势；④相关性分析结果表明，总氮（TN）、硝氮（NO3--N）、亚硝氮（NO2--N）和氨氮（NH4+-N）与大部分QNs［OFL、诺氟沙星（NOR）、ENR、双氟沙星（DIF）和喹酸（OXO）］分配系数显著相关，温度（T）、总有机碳（TOC）和总溶解性固体颗粒物（TDS）与个别QNs［马波沙星（MAR）和DIF］分配系数显著相关.因此，水体富营养化水平会影响抗生素在水体-沉积物中的分配行为. |
| 英文摘要 |
| Sediment is the main storage medium of antibiotics in a water environment, and a growing body of research has focused on the distribution behavior of antibiotics in water-sediment. However, most of the previous studies were based on laboratory simulation, and less attention was paid to the distribution behavior of antibiotics in a natural water environment and its correlation with environmental factors. Thus, the surface water and sediment in Shijiazhuang were taken as the research object for this study. The temporal and spatial distribution characteristics of quinolone (QNs) antibiotics in Shijiazhuang water were analyzed by using high performance liquid chromatography-tandem mass spectrometry (HPLC-MS), calculating the distribution coefficients of quinolone (QNs) antibiotics in water and sediment, and confirming the main environmental factors influencing the distribution coefficient in natural water. The results showed that:① the content of ΣQNs in water and sediment ranged from 8.0 to 4.4×103 ng·L-1 and 16 to 2.2×103 ng·g-1 in Shijiazhuang water, whereas the primary QNs in water and sediment were enrofloxacin (ENR) and ofloxacin (OFL), respectively. ② The total concentrations of ΣQNs in Shijiazhuang water showed a tendency of being higher in December (1.0×104 ng·L-1) than in April (5.5×103 ng·L-1), and QNs in sediment were also higher in December (7.8×103 ng·g-1) than in April (6.2×103 ng·g-1). ③ The distribution coefficient of QNs in Shijiazhuang water varied from 34 to 2.9×105 L·kg-1 and showed a trend of being greater in December than in April. ④ The results of correlation analysis showed that total nitrogen (TN), nitrate nitrogen (NO3--N), nitrite nitrogen (NO2--N), and ammonia nitrogen (NH4+-N) were significantly correlated with most distribution coefficients of QNs[OFL, norfloxacin (NOR), ENR, difloxacin (DIF), and oxolinic acid (OXO)], whereas temperature (T), total organic carbon (TOC), and total dissolved solids (TDS) were significantly correlated with individual distribution coefficients of QNs[marbofloxacin (MAR) and DIF]. Therefore, the eutrophication level of water affects the distribution behavior of antibiotics in water-sediment. |
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