泉州市酸雨动态监测变化研究

Research on Dynamic Monitoring Changes of Acid Rain in Quanzhou City

对2016—2022年度期间的泉州市降水进行动态监测,分析降水的酸度及主要的离子组分变化,体现泉州市降水的酸雨治理成效及主要致酸离子成分变化,进一步提升政府酸雨治理能力。研究表明:2016年至2022年期间,泉州市降水年均pH均大于5.6,泉州市区降水平均酸雨频率为11.8%,虽然整个泉州市降水属于非酸雨类型,但是每个测点降水pH年均值与去年相比有下降的趋势,存在酸雨污染恶化的风险。2016—2022年度期间,[硫酸根]/[硝酸根]浓度比值整体呈现下降趋势,在2020年首次降至1.0以下,表明硝酸根从2020年开始取代硫酸根成为泉州市降水中主要的致酸离子。

In this paper,the dynamic monitoring of precipitation in Quanzhou City during 2016-2022 was conducted to analyze the changes of precipitation acidity and main ion components,reflecting the acid rain treatment effectiveness of Quanzhou City precipitation and the changes of main acid-causing ion components,and further improving the acid rain treatment ability of the government.The research shows that during the period from 2016 to 2022,the average annual pH value of precipitation in Quanzhou is greater than 5.6,and the average frequency of acid rain in Quanzhou urban area is 11.8%.Although the precipitation in Quanzhou belongs to the type of non-acid rain,the annual mean pH value of precipitation at each measuring point has a downward trend compared with last year,and there is a risk of worsening acid rain pollution.During 2016-2022,the ratio of[sulfate]/[nitrate]concentration showed an overall downward trend,and dropped below 1.0 for the first time in 2020,indicating that nitrate replaced sulfate as the main acid-causing ion in precipitation in Quanzhou from 2020.