相关实验视频

Updated: Jun 13, 2025

Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow

Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow

Published on: April 18, 2019

用3D水力动力学和水质模型来描述水生生态系统中的PFAS

Jingjie Zhang^1,2,3,4,5, Huiting Chen³, Nguyen Viet Tung³

¹State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130102, China.

Environmental science and ecotechnology

|September 10, 2024

概括

这项研究在河口水库中模拟了和多基物质 (PFAS),揭示了大多数PFAS仍然溶解,并带来了可以接受的风险. 该水库显示有能力缓冲增加的PFAS负载,特别是对 perfluorooctanoic 酸 (PFOA).

科学领域:

环境化学环境化学
生态毒理学生态毒理学
环境建模环境建模

背景情况:

了解和多基物质 (PFAS) 进入水生环境的复杂途径至关重要.
不同环境矩阵中PFAS的时空动态和运输机制尚不清楚.

研究的目的:

调查PFAS在河口水库中的命运和运输机制.
量化总PFAS, perfluorooctanoate (PFOA) 和 perfluorooctane sulfonate (PFOS) 在水,颗粒物和沉积物的分布.
评估水库中与PFAS相关的潜在生态风险.

主要方法:

集成监测数据与详细的3D模型,包括水文,水力动力学和水质过程.
对模型结果与四年现场测量的验证.
在溶解,颗粒物和沉积物阶段量化PFAS分布.

主要成果:

大多数PFAS (>95%) 在溶解阶段被发现,较小的部分与破碎物 (1.0-3.5%) 和浮游植物 (1-2%) 相关.
对于PFOS (<0.32) 和PFOA (<0.00016) 的风险系数表明水库中的风险水平是可以接受的.
储水池显示出显著的缓冲能力,可以应对外部PFAS负载的十倍增加,特别是PFOA.

结论:

综合建模方法有效地描述了水生生态系统中的PFAS发生,来源,下沉点和趋势.
该研究增强了对污染物运输的理解,并为研究新出现的污染物减缓策略提供了框架.
河口水库可以拥有相当大的能力,以减轻PFAS污染的风险.

关键词:

新出现的污染物 (ECs)他们的命运和运输.集成建模集成建模集成建模金融基金管理系统 (PFAS) 是一个.这就是PFOA的PFOA.在PFOS系统中,我们可以风险评估风险评估风险评估

更多相关视频

In Silico Modeling Method for Computational Aquatic Toxicology of Endocrine Disruptors: A Software-Based Approach Using QSAR Toolbox

In Silico Modeling Method for Computational Aquatic Toxicology of Endocrine Disruptors: A Software-Based Approach Using QSAR Toolbox

Published on: August 28, 2019

Watershed Planning within a Quantitative Scenario Analysis Framework

Watershed Planning within a Quantitative Scenario Analysis Framework

Published on: July 24, 2016

相关概念视频

Typical Model Studies

Typical Model Studies

Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.

Design Example: Creating a Hydraulic Model of a Dam Spillway

Design Example: Creating a Hydraulic Model of a Dam Spillway

Scaled hydraulic models of dam spillways provide a practical way to replicate and study the intricate flow dynamics of these structures. Often built to a 1:15 ratio, these models allow for observing critical water behavior, such as velocity distribution, flow patterns, and energy dissipation.

Rapidly Varying Flow

Rapidly Varying Flow

Rapidly varying flow (RVF) in open channels is characterized by abrupt changes in flow depth over a short distance, with the rate of depth change relative to distance often approaching unity. These flows are inherently complex due to their transient and multi-dimensional nature, making exact analysis difficult. However, approximate solutions using simplified models provide valuable insights into their behavior.Key Features of Rapidly Varying FlowRVF is commonly observed in scenarios involving...

Modeling and Similitude

Modeling and Similitude

Scaled modeling is a fundamental technique in engineering, enabling the study of large and complex systems by creating smaller, manageable replicas that recreate critical characteristics of the original. In hydrology and civil infrastructure, for example, scaled models of dams help analyze water flow, turbulence, and pressure. This method allows for accurate predictions of real-world behavior within a controlled environment, significantly reducing the cost and time involved in full-scale...