科研之友
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摘要
Increased capacity in petrochemical industrial park leads to the significant rise in VOCs emissions，accordingly aggravating the O3 pollution in local and surrounding cities. In the Pearl River Delta region，the well implement of VOCs multiple substitution policy can effectively offset the adverse impact of rising VOCs emissions in petrochemical industrial parks by reducing the total amount of VOCs emissions at the city scale，thereafter lowering the regional O3 concentration. Taking a petrochemical park in Huizhou City as typical case study，we compiled the emission inventories of increased capacity and the implementation of VOCs multiple substitution policy during 2018 to 2020. With the developed emission inventories，the impacts of the petrochemical industrial park on O3 concentrations under the meteorological conditions from July to October in the base year（2017）were then quantified using WRF-CMAQ. The results showed that，7298.97 tons of VOCs were ultimate reduced attribute to the policy-implement of VOCs multiple substitution ，although the increased capacity of the petrochemical industrial park brought 4101.96 tons of VOCs emissions. The simulation results proved that the policy of VOCs multiple substitution can effectively mitigate the adverse effect of the increased capacity in petrochemical industrial park on O3 concentration. In July，the reduction of O3 concentrations were maximum in Shenzhen and Guanweihui monitor station，with the reduction concentration at 3.9 μg·m-3（with a decline rate 2.97%）and 7 μg·m-3（with a decline rate 4.95%），respectively. This was because their locations were in the downwind of the dominant wind direction of the southeast in July. From July to October，the average reduction contribution of O3 in Huizhou，Shenzhen，Dongguan and Shanwei were 0.96 μg·m-3（with a decline rate 0.53%），1.39 μg·m-3（with a decline rate 0.99%），0.33 μg·m-3 （with a decline rate 0.2%） and 0.3 μg·m-3 （with a decline rate 0.22%），respectively，while the contribution to O3 concentration reductions in Guangzhou and Shanwei were nearly neglectable. ? 2023 Science Press.
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