VOCs Source Distribution and Ozone Formation in Deyang City from June to September in 2023
The meteorological conditions and monitoring data of ozone and its precursors NO2,VOCs in Deyang City June-September 2023)were analyzed.The average VOCs concentration in Deyang from June to September was 39.52 ppbv.The daily time series of ozone concentration showed a unimodal distribution and reached its peak at 16∶00-18∶00.The ozone heavy pollution is basically accompanied by high temperature,low humidity,low wind speed and other meteorological conditions.The positive matrix decomposition(PMF)receptor model was used for VOCs source analysis.Mobile source,fixed combustion source and process process source were the main sources of VOCs,contributing 21.00%,17.40%and 14.96%to VOCs,respectively.The ozone formation potential(OFP)values showed that the main active substances were OVOCs and olefin,represented by propionaldehyde and ethylene.
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