Research on the Pollutant Migration Law Based on Large-Scale Three-Dimensional Similar Simulation Experiments of Underground Coal Gasification.

According to the area percentage diagram ( Figure 14 ) of sampling points 1–6 obtained from the peak fitting diagram ( Figure 13 ) and the functional group attribution table ( Table 4 ), the proportion of phenolic pollutants at sampling point 3 is the largest and shows a decreasing trend to the south.

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