相关实验视频

Updated: Jun 21, 2025

Two-Dimensional Visualization and Quantification of Labile, Inorganic Plant Nutrients and Contaminants in Soil

Two-Dimensional Visualization and Quantification of Labile, Inorganic Plant Nutrients and Contaminants in Soil

Published on: September 1, 2020

在一个大城市的大气颗粒物中全面识别重金属的来源:杭州的一个案例研究

Feili Li¹, Gaoxiang Zhang², Yifei Jinxu¹

¹College of Environment, Zhejiang University of Technology, Hangzhou 310032, PR China.

Journal of environmental management

|July 11, 2024

概括

大城市颗粒物 (PM) 中的重金属污染是一个主要问题. 这项研究确定了交通排放,废物焚烧和远程运输是杭州和等重金属的主要来源.

科学领域:

环境科学环境科学
大气化学大气化学
污染分析污染分析

背景情况:

大城市面临着重金属 (HM) 颗粒物 (PM) 污染的重大挑战.
精确识别PM中的HM来源是复杂的,尽管有先进的分析方法.
在杭州市,高度的 (Cd) 和 (Ni) 超过了世卫组织的限制.

研究的目的:

确定杭州市PM₁和PM_1-10的重金属 (HMs) 的主要来源.
在不同的天气条件下 (模糊,干净,下雨) 调查HM度模式.
为分析大城市PM中复杂的HM源提供一个强大的方法.

主要方法:

利用长达一年的PM₁和PM_1-10的每日采样数据集.
采用主要成分分析 (PCA),丰富系数 (EF) 和逆向轨迹分析.
进行的同位素分析 (Pb同位素) 用于来源分配.

主要成果:

年平均度Cd和Ni分别超过了世卫组织限制的4.1倍和1.9倍.
铁,,和与交通排放有关;雾涉及远程和本地来源.
在雾的日子里,Cd水平下降,而在雨天,Ni水平增加,这归因于废物焚烧和南部空气流.

结论:

一种多方面的方法成功地划分了杭州PM的HM来源.
Cd来源与清洁天的南方空气流有关;Ni来源主要是废物焚烧.
该研究提供了一个可靠的方法,用于复杂的HM源分析在城市PM.

关键词:

回程轨迹分析回程轨迹分析这是一种重金属,重金属.气象因素是气象因素.Pb是同位素的同位素之一.源标识来源的标识.

更多相关视频

Resource Recycling of Red Soil to Synthesize Fe2O3/FAU-type Zeolite Composite Material for Heavy Metal Removal

Resource Recycling of Red Soil to Synthesize Fe2O3/FAU-type Zeolite Composite Material for Heavy Metal Removal

Published on: June 2, 2022

Clean Sampling and Analysis of River and Estuarine Waters for Trace Metal Studies

Clean Sampling and Analysis of River and Estuarine Waters for Trace Metal Studies

Published on: July 1, 2016

相关概念视频

Voltammetry: Stripping Methods

Voltammetry: Stripping Methods

Anodic Stripping Voltammetry (ASV), Cathodic Stripping Voltammetry (CSV), and Adsorptive Stripping Voltammetry (AdSV) are electrochemical techniques used to determine trace amounts of analytes in solution. These methods involve applying a potential to an electrode and measuring the resulting current.
Anodic Stripping Voltammetry (ASV)
ASV is used to determine metals and metalloids at trace levels. It involves two steps: deposition and stripping. First, a negative potential is applied to the...

Precipitation and Co-precipitation

Precipitation and Co-precipitation

Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...