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Clean Sampling and Analysis of River and Estuarine Waters for Trace Metal Studies
Published on: July 1, 2016
Pahs and trace elements in PM(2.5) at the Venice Lagoon
Andrea Gambaro1, Laura Manodori, Giuseppa Toscano
1Environmental Sciences Department, Ca' Foscari University of Venice, 30123 Venice, Italy. gambaro@unive.it
Annali Di Chimica
|August 19, 2007
Summary
This study analyzed particulate matter (PM2.5) and its components, finding higher nocturnal concentrations and identifying petrogenic sources for polycyclic aromatic hydrocarbons (PAHs). Wind speed and local circulation patterns influenced PM2.5 levels.
Area of Science:
- Environmental Science
- Atmospheric Chemistry
- Air Quality Monitoring
Background:
- Particulate matter (PM2.5) poses significant health risks.
- Understanding the sources and composition of PM2.5 is crucial for air quality management.
- Polycyclic Aromatic Hydrocarbons (PAHs) and trace elements are key PM2.5 components.
Purpose of the Study:
- To investigate PM2.5 concentration levels and chemical composition.
- To identify sources of PM2.5, PAHs, and trace elements.
- To analyze the influence of meteorological conditions on PM2.5 concentrations.
Main Methods:
- Experimental analysis using a micrometeorological station with an optical PM2.5 detector.
- Simultaneous collection of atmospheric particles on filters for chemical analysis.
- Analysis of trace elements, PAHs, and discriminating ratios.
Main Results:
- Average daily PM2.5 concentration was 21.5 ug/m3, with higher nocturnal levels.
- Increased wind speed reduced PM2.5; local breeze circulation, especially from the Alps, increased concentrations.
- Trace metal concentrations were comparable to other urban areas, except for Cd; K and Na were highest. PAH concentrations were comparable to industrial areas, with a predominantly petrogenic origin.
Conclusions:
- PM2.5 levels are influenced by diurnal meteorological patterns and wind direction.
- The primary source of PAHs in PM2.5 is likely petrogenic, with potential contributions from combustion.
- Specific industrial activities (e.g., glassworks) may influence local trace element concentrations.
