Chemical features of atmospheric particulate matter in longmen grottoes

Atmospheric particulate matter (PM2.5) pollution at Longmen Grottoes is significantly exceeding safe limits, particularly during winter, with coal burning identified as a primary source. The study reveals that PM2.5 in the area is acidic, contributing to environmental damage and corrosion of the grottoes' surfaces. High linear correlations between organic carbon (OC) and elemental carbon (EC) suggest shared pollution sources, while zinc (Zn), lead (Pb), and chromium (Cr) are prominent heavy metal contaminants. Researchers analyzed PM2.5 concentrations using whole-sample techniques, assessing water-soluble ions, carbonaceous substances, and heavy metals to uncover these chemical features.

Wang Ru, & Tian Hongfang. (2018). Chemical features of atmospheric particulate matter in longmen grottoes. Chemical Engineering Transactions, 66, 625–630. https://doi.org/10.3303/CET1866105