Polycyclic aromatic hydrocarbons (PAHs) around tea processing industries using high-sulfur coals

Area of Science:

• Environmental Chemistry
• Atmospheric Science
• Industrial Pollution

Background:

• Tea processing units often utilize high-sulfur coal, a potential source of air pollutants.
• Polycyclic Aromatic Hydrocarbons (PAHs) are a group of organic compounds with known adverse health effects.
• Particulate matter (PM2.5 and PM10) can carry and transport PAHs in the atmosphere.

Purpose of the Study:

• To quantify the concentrations of 16 different PAHs associated with PM2.5, PM10, and dust.
• To investigate the contribution of coal combustion in tea processing units to ambient PAH levels.
• To identify potential sources contributing to PAH pollution in the study area.

Main Methods:

• Sampling and analysis of PM2.5, PM10, and dust particles for 16 specific PAHs.
• Utilizing the Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) model.
• Source apportionment analysis to differentiate contributions from various emission sources.

Main Results:

• Significant concentrations of total PAHs were detected in PM10, PM2.5, and dust samples from both study sites.
• Site B exhibited higher total PAH concentrations compared to Site A.
• HYSPLIT modeling indicated that both local industrial emissions and long-range transport contributed to the observed PAH levels.

Conclusions:

• Coal combustion in tea processing industries is a significant source of PAHs.
• Biomass burning and vehicular emissions are also likely contributors to the PAH burden.
• Effective emission control strategies are necessary to mitigate PAH pollution from industrial and other sources.