2022~2024年泽泻初加工对夹江县冬季PM_2.5污染影响研究

Impacts of Primary Processing of Alisma Orientale on PM_2.5 Pollution in Jiajiang County during Winter of 2022~2024

摘要: 泽泻初加工是导致2022~2024年夹江县冬季大气重污染天气频发的重要原因之一，本文基于夹江县县域环境空气质量自动监测体系，研究泽泻初加工期间PM_2.5污染状况，评估专项治理政策实施效果。168小时连续监测数据表明，2022年泽泻初加工最活跃地区的PM_2.5小时均值最高达497 μg/m³，日均值连续7天超过重度污染级别限值，导致临近甘江镇和县城城区环境空气中PM_2.5浓度显著增加，分别出现3天和1天的重度污染天气。经专项治理后，2024年泽泻初加工集中区PM_2.5浓度整体上低于甘江镇，环境空气质量与县城城区接近，监测期间未出现重污染天气。此外，本文还利用克里金插值法对泽泻初加工期间PM_2.5污染发展过程进行了研究。

Abstract: The primary processing of Alisma orientale was one of the significant contributors to the frequent occurrence of heavily polluted weather in Jiajiang County during the winter from 2022 to 2024. Based on the ambient air quality automatic monitoring system, this study investigates the PM_2.5 pollution during the Alisma orientale processing period and evaluates the effectiveness of the implemented targeted control policies. The continuous 168-hour monitoring data revealed that the hourly average PM_2.5 concentration in the most active processing area peaked at 497 μg/m³, with daily averages exceeding the severe pollution level threshold for seven consecutive days. This led to a notable increase in PM_2.5 concentrations in the ambient air of nearby Ganjiang Town and the urban area of Jiajiang County, resulting in three days and one day of severe pollution weather, respectively in 2022. Following targeted governance measures, the PM_2.5 concentrations in the concentrated processing area were generally lower than those in Ganjiang Town, and the ambient air quality was comparable to that of the urban area of Jiajiang County in 2024. No heavily polluted weather was recorded during the monitoring period. Additionally, the Kriging interpolation method was employed to analyze the progression of PM_2.5 pollution during the Alisma orientale processing period.