Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021WR031272 |
Seasonal Differences in the Attenuation of Polar Trace Organics in the Hyporheic Zone of an Urban Stream | |
Birgit M. Mueller; Hanna Schulz; Anja Hö; hne; Anke Putschew; Joerg Lewandowski | |
2022-01-11 | |
发表期刊 | Water Resources Research |
出版年 | 2022 |
英文摘要 | Attenuation of trace organic compounds (TrOCs) in a river occurs to a large extent in its hyporheic zone. A major part of the attenuation of polar TrOCs is of microbial origin. As microbial activity depends on temperature and redox conditions, seasonal differences in TrOC attenuation are likely. We investigated TrOC attenuation at a river influenced by treated wastewater during two sampling campaigns, one in summer and one in winter. In addition to redox conditions and temperature, we also determined residence times of porewater in sediment using three methods: a) non-parametric deconvolution of electrical conductivity time series, b) the model VFLUX 2.0 based on temperature time series (only summer), and c) applying Darcy’s law to differences in hydraulic heads (only summer). Contrary to our expectations, we found higher attenuation for 12 out of 18 TrOCs in winter, while 3 TrOCs were better attenuated in summer. Sediment conditions varied between seasons as more of the top sandy layer with a higher hydraulic permeability accumulated on the river bed in summer. As a result, residence times in the sediment were shorter in summer. In winter, longer residence times, lower temperatures and a steeper oxygen gradient in sediment coincided with higher TrOC attenuation. Further research is needed to understand our unexpected findings and underlying mechanisms. This article is protected by copyright. All rights reserved. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/345096 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Birgit M. Mueller,Hanna Schulz,Anja Hö,et al. Seasonal Differences in the Attenuation of Polar Trace Organics in the Hyporheic Zone of an Urban Stream[J]. Water Resources Research,2022. |
APA | Birgit M. Mueller,Hanna Schulz,Anja Hö,hne,Anke Putschew,&Joerg Lewandowski.(2022).Seasonal Differences in the Attenuation of Polar Trace Organics in the Hyporheic Zone of an Urban Stream.Water Resources Research. |
MLA | Birgit M. Mueller,et al."Seasonal Differences in the Attenuation of Polar Trace Organics in the Hyporheic Zone of an Urban Stream".Water Resources Research (2022). |
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