春节烟花燃放对颗粒物贡献的定量分析

根据2015—2021年内江市环境空气质量监测数据,采用相对比值法对内江市城区烟花燃放的影响情况进行评估。结果表明:春节烟花燃放对内江城区PM_(2.5),PM_(10)的年贡献值分别为0.01~0.84,0.01~0.94μg/m^(3);对PM_(2.5),PM_(10)的年贡献率分别为0.03%~1.71%,0.02%~1.36%;对PM_(2.5),PM_(10)浓度的抬升率分别为20.2%~169.1%,21.5%~126.2%;斯皮尔曼(Spearman)秩相关系数分析表明,燃放期PM_(2.5)(PM_(10))浓度峰值的下降趋势有显著性,但年贡献值和年贡献率的下降趋势不具有显著性,烟花燃放不利影响的改善不具有显著性。

According to the monitoring data of ambient air quality in Neijiang from 2015 to 2021,the impact of fireworks discharge in Neijiang is evaluated by using the relative ratio method.The results show that the annual contribution of Spring Festival fireworks discharge to PM_(2.5)/PM_(10)in Neijiang is 0.01-0.84μg/m^(3),0.01-0.94μg/m^(3);the annual contribution rates to PM_(2.5)/PM_(10)are 0.03%-1.71% and 0.02%-1.36% respectively;the uplift rates of PM_(2.5)/PM_(10)are 20.2%-169.1% and 21.5%-126.2% respectively.Spearman correlation analysis shows that during the discharge period,the peak concentration of PM_(2.5)(PM_(10))has a significant downward trend,but the downward trend of annual contribution value and annual contribution rate is not significant.The improvement in adverse effects of fireworks were not significant.