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首页> 外文期刊>Environmental Science & Technology >Determination of Sulfamethoxazole Degradation Rate by an in Situ Experiment in a Reducing Alluvial Aquifer of the North China Plain
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Determination of Sulfamethoxazole Degradation Rate by an in Situ Experiment in a Reducing Alluvial Aquifer of the North China Plain

机译：华北平原还原性冲积含水层原位试验测定磺胺甲恶唑的降解速率

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摘要

Effluents from wastewater treatment facilities are reclaimed for environmental and landscaping use, resulting in infiltration to groundwater. Trace organic contaminants in these effluents have raised concerns, including the antibiotic resistance contributor sulfamethoxazole (SMX) detected frequently at concentrations exceeding 0.01 mu g/L. A push-pull study to evaluate in situ degradation of SMX was undertaken in a shallow alluvial aquifer at the Tongzhou groundwater experimental site in southeast suburban Beijing. Ambient groundwater (1000 L) extracted from an experimental well at a depth of 10 m was spiked with SMX and NaBr, and then injected back into the same well. SMX and Br were "stored" over 15 days and monitored in the experimental well and 4 multilevel (depth: 10, 15, 17.5, 20, 25, and 30 m) observation wells located within 2-3 m distance. The concentration of SMX decreased faster than that of Br in the experimental and one observation well at 10 m depth; samples from all other depths contained little Br and SMX. The half-life of SMX degradation is estimated to be 3.1 +/- 0.2 and 6.5 +/- 0.6 days in the experimental well and observation well, respectively, under suboxic/anoxic conditions.
机译：废水处理设施中的废水经过回收，可用于环境和景观美化，从而导致地下水渗入。这些废水中的痕量有机污染物引起了人们的关注，包括经常以超过0.01μg / L的浓度检测到的抗生素抗性贡献者磺胺甲恶唑（SMX）。在北京东南郊区通州地下水实验点的浅冲积含水层中进行了推拉研究，以评估SMX的原位降解。从实验井中抽取的深度为10 m的地下水（1000 L）用SMX和NaBr加标，然后注入到同一井中。 SMX和Br被“存储”了15天，并在实验井和位于2-3 m距离内的4个多层（深度：10、15、17.5、20、25和30 m）观察井中进行监视。在10 m深度的实验和一口观测井中，SMX的浓度下降速度快于Br。其他所有深度的样品中都几乎不含Br和SMX。在低氧/缺氧条件下，SMX降解的半衰期在实验孔和观察孔中分别估计为3.1 +/- 0.2天和6.5 +/- 0.6天。

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  • 来源
    《Environmental Science & Technology》 |2019年第18期|10620-10628|共9页
  • 作者

    Ma Meng; Dillon Peter; Zheng Yan;

  • 作者单位

    Peking Univ Coll Engn Dept Energy & Resources Engn Beijing 100871 Peoples R China|Southern Univ Sci & Technol Sch Environm Sci & Engn Guangdong Prov Key Lab Soil & Groundwater Pollut Shenzhen 518055 Peoples R China|Southern Univ Sci & Technol Sch Environm Sci & Engn State Environm Protect Key Lab Integrated Surface Shenzhen 518055 Peoples R China;

    Southern Univ Sci & Technol Sch Environm Sci & Engn Guangdong Prov Key Lab Soil & Groundwater Pollut Shenzhen 518055 Peoples R China|Southern Univ Sci & Technol Sch Environm Sci & Engn State Environm Protect Key Lab Integrated Surface Shenzhen 518055 Peoples R China|CSIRO Land & Water Adelaide SA 5042 Australia|Flinders Univ S Australia Natl Ctr Groundwater Res & Training Adelaide SA 5042 Australia;

    Southern Univ Sci & Technol Sch Environm Sci & Engn Guangdong Prov Key Lab Soil & Groundwater Pollut Shenzhen 518055 Peoples R China|Southern Univ Sci & Technol Sch Environm Sci & Engn State Environm Protect Key Lab Integrated Surface Shenzhen 518055 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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