Heavy Metals in Particulate Matter-Trends and Impacts on Environment

Area of Science:

• Environmental Science
• Toxicology
• Atmospheric Chemistry

Background:

• Heavy metals are critical environmental pollutants, often found below 10 ppm, posing significant risks to human health.
• Industrial activities (mining, agriculture, transport), corrosion, volcanic eruptions, and atmospheric deposition contribute to heavy metal contamination.
• Atmospheric particulate matter (PM) with diameters <10 microns frequently contains metallic species like Cadmium (Cd), Chromium (Cr), Copper (Cu), and Nickel (Ni).

Purpose of the Study:

• To review the primary sources and types of heavy metals within atmospheric particulate matter (PM).
• To highlight key occurrence mechanisms and detection techniques for atmospheric heavy metals.
• To assess the impact of heavy metals on biogeochemical soil processes, the food chain, the environment, and human health.

Main Methods:

• Literature review focusing on heavy metals in atmospheric particulate matter.
• Analysis of industrial and natural sources of heavy metal pollution.
• Examination of detection methodologies for heavy metals in PM.
• Review of environmental and health impact studies.

Main Results:

• Identified major industrial and natural sources contributing heavy metals to the atmosphere.
• Detailed various mechanisms of heavy metal occurrence in PM.
• Summarized current detection techniques for atmospheric heavy metals.
• Highlighted the significant impact on soil, food chains, and human health.

Conclusions:

• The review consolidates current knowledge on global heavy metals in PM.
• Identified knowledge gaps in understanding heavy metal impacts and mitigation strategies.
• Emphasized the need for further research to address environmental and health concerns related to heavy metals in PM.