Correlation analysis was conducted between the odor concentrations
and concentrations of chemical groups to identify further
the relationship between the results of instrumental analysis and
that of human olfactory senses (Table 7). Different compounds
were found to contribute to the different odor pollution situations
in four seasons on the working face. Sulfur compounds, aldehydes,
and ketones are the major odor contributors in spring, which can
explain nearly 90% of the odor concentration variation. High concentrations
of other oxygenated compounds (i.e., esters, ethers,
and alcohols) lead to olfactory nuisance in summer. The serious
odor pollution on the working face in autumn and in the winter