Trace Organic Contaminant Transfer and Transformation in Bioretention Cells: A Field Tracer Test with Benzotriazole,Environmental Science & Technology

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Trace Organic Contaminant Transfer and Transformation in Bioretention Cells: A Field Tracer Test with Benzotriazole
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2021-09-08 , DOI: 10.1021/acs.est.1c01062
Xinyao Gu ₁ , Timothy F M Rodgers ₁ , Sylvie Spraakman ₂ , Tim Van Seters ₃ , Robert Flick ₁ , Miriam L Diamond _{1,

4,

5} , Jennifer Drake ₂ , Elodie Passeport _{1,

2}

Affiliation

Bioretention cells can effectively infiltrate stormwater runoff and partly remove conventional water contaminants. A field tracer injection experiment in a conventionally designed bioretention cell was used to investigate the fate of benzotriazole, a model trace organic contaminant, during and between runoff events. Moderate (29%) benzotriazole load reductions were measured during the 6 h long injection experiment. The detection of 1-methyl benzotriazole, hydroxy benzotriazole, and methoxy benzotriazole provided in situ evidence of some rapid benzotriazole microbial transformation during the tracer test and more importantly between the events. The detection of benzotriazole alanine and benzotriazole acetyl alanine also showed fast benzotriazole phytotransformation to amino acid conjugates during the tracer test and suggests further transformation of phytotransformation products between events. These data provide conclusive full-scale evidence of benzotriazole microbial and phytotransformation in bioretention cells. Non-target chemical analysis revealed the presence of a diverse range of trace organic contaminants in urban runoff and exiting the bioretention cell, including pesticides and industrial, household, and pharmaceutical compounds. We have demonstrated the in situ potential of urban green infrastructure such as bioretention cells to eliminate polar trace organic contaminants from stormwater. However, targeted design and operation strategies, for example, hydraulic control and the use of soil amendments, should be incorporated for improved bioretention cell performance for such compounds.

中文翻译：

生物滞留细胞中痕量有机污染物的转移和转化：使用苯并三唑进行现场示踪试验

生物滞留池可以有效地渗入雨水径流并部分去除传统的水污染物。使用常规设计的生物滞留池中的现场示踪剂注入实验来研究苯并三唑（一种模型痕量有机污染物）在径流事件期间和之间的归宿。在 6 小时长注射实验期间测量到中等 (29%) 苯并三唑负载减少。1-甲基苯并三唑、羟基苯并三唑和甲氧基苯并三唑的检测为示踪剂测试期间以及更重要的事件之间的一些快速苯并三唑微生物转化提供了原位证据。苯并三唑丙氨酸和苯并三唑乙酰丙氨酸的检测也显示在示踪剂测试期间苯并三唑快速植物转化为氨基酸缀合物，并表明事件之间植物转化产物的进一步转化。这些数据为生物滞留细胞中苯并三唑微生物和植物转化提供了确凿的全面证据。非目标化学分析表明，城市径流和离开生物滞留池的有机污染物存在多种痕量有机污染物，包括杀虫剂和工业、家庭和药物化合物。我们已经证明了城市绿色基础设施的原位潜力，例如生物滞留池，以消除雨水中的极地痕量有机污染物。然而，有针对性的设计和运营策略，例如，

更新日期：2021-09-21

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