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Modeling in-stream attenuation of N-nitrosodimethylamine and formaldehyde during urban river transportation based on seasonal and diurnal variation. | LitMetric

Modeling in-stream attenuation of N-nitrosodimethylamine and formaldehyde during urban river transportation based on seasonal and diurnal variation.

Environ Sci Pollut Res Int

Research Center for Environmental Quality Management, Graduate School of Engineering, Kyoto University, 1-2 Yumihama, Otsu, Shiga, 520-0811, Japan.

Published: March 2021

AI Article Synopsis

  • Disinfection by-products (DBPs) from sewage treatment plants can negatively affect rivers and drinking water sources, and their behavior during river transport isn't well understood.
  • This study used a meta-data analysis over three years to model how these DBPs, particularly NDMA and formaldehyde, break down in a river influenced by treated wastewater.
  • The research found that factors like photo-irradiation and water temperature significantly impact the degradation of these substances, leading to accurate predictive models for managing DBP levels in rivers.

Article Abstract

Disinfection by-products (DBPs) discharged from sewage treatment plants (STPs) could harm downstream receiving waters and drinking water resources. In-stream attenuation of photo- and non-photodegradable DBPs during river transportation is currently not well understood. Here we sought to fill this knowledge gap by meta-data-analysis for modeling in-stream attenuation of DBPs. Data were collected along a treated-wastewater-dominated 1.6-km stretch of a river channel for 3 years and incorporated seasonal and diurnal patterns. Photo-irradiation and water temperature were the main factors responsible for in-stream attenuation of photodegradable N-nitrosodimethylamine (NDMA), and water temperature for that of non-photodegradable formaldehyde (FAH). The factors were incorporated into photo-dependent and -independent models to account for temporal variations in NDMA and FAH, respectively. Estimated mass recoveries of NDMA and FAH agreed well with observed values along the stretch. The models developed here offer a novel and useful tool for estimating levels of NDMA and FAH during river transportation.

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Source
http://dx.doi.org/10.1007/s11356-020-11361-3DOI Listing

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