相关实验视频

Updated: Jun 27, 2025

Demonstration of the Sequence Alignment to Predict Across Species Susceptibility Tool for Rapid Assessment of Protein Conservation

Demonstration of the Sequence Alignment to Predict Across Species Susceptibility Tool for Rapid Assessment of Protein Conservation

Published on: February 10, 2023

在具有不同土地使用模式的地区的河流沉积物中发现双相似物的存在,来源分配和生态风险

Sheng Zhang¹, Yifan Fan¹, Xin Qian²

¹State Key Laboratory of Pollution Control and Resources Reuse, School of Environment, Nanjing University, Nanjing, 210023, China.

Journal of environmental management

|May 4, 2024

概括

河流沉积物中的双相似物 (BPs) 呈现出不同度,其中双A (BPA) 主导. 土地使用对BP分布产生了重大影响,城市地区带来了更高的生态风险.

科学领域:

环境化学环境化学
生态毒理学生态毒理学
沉积物的分析分析.

背景情况:

双相似物 (BPs) 是无处不在的环境污染物,具有潜在的内分泌干扰性.
关于河流沉积物中BP的时空分布,来源和生态风险的数据有限,特别是在农业城市梯度中.

研究的目的:

调查海河流域六种双类相应物的分布,来源分配和生态风险.
评估土地使用模式和洪水时期对河流沉积物中BP污染的影响.

主要方法:

河流沉积物的实地采样,在洪水期间前后,在农业城市梯度的河流沉积物.
使用先进的分析技术对六种双相似物进行分析.
多变量统计分析 (MANOVA) 和正矩阵因数分解 (PMF) 用于来源分配.
使用土生物的风险系数方法进行生态风险评估.

主要成果:

总BP度在2.16-151 ng/g之间,洪水前后没有显著差异. 双A (BPA) 是主要的同源物.
土地使用显著影响了BP分布,城市河流沉积物比郊区,农业和水库沉积物度更高.
PMF确定了工业涂料,织品,电子产品,生物制药和城市废水/固体废物作为潜在的来源.
生态风险评估表明BPA对盆地生物的风险很低,但风险随着土地使用而显著变化,从水库增加到城市河流.

结论:

土地利用是影响BP污染和河流沉积物的生态风险的关键因素.
城市地区是BP污染的热点,需要有针对性的管理策略.
尽管总体风险较低,但土地使用依赖的变化凸显了需要继续监测和控制BP的来源.

关键词:

双醇类似物双醇类似物生态风险生态风险土地使用模式.发生的情况.河流沉积物的沉积物

更多相关视频

Screening for Endocrine Activity in Water Using Commercially-available In Vitro Transactivation Bioassays

Screening for Endocrine Activity in Water Using Commercially-available In Vitro Transactivation Bioassays

Published on: December 4, 2016

Long-term Behavioral and Reproductive Consequences of Embryonic Exposure to Low-dose Toxicants

Long-term Behavioral and Reproductive Consequences of Embryonic Exposure to Low-dose Toxicants

Published on: March 6, 2018

相关概念视频

Sampling Plans

Sampling Plans

Sampling is a crucial step in analytical chemistry, allowing researchers to collect representative data from a large population. Common sampling methods include random, judgmental, systematic, stratified, and cluster sampling.
Random sampling is a method where each member of the population has an equal chance of being selected for the sample. It involves selecting individuals randomly, often using random number generators or lottery-type methods. For example, when analyzing the properties of a...

Design Example: Analyzing Capacity Contours for Flood Risk Assessment

Design Example: Analyzing Capacity Contours for Flood Risk Assessment

Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...