合肥市降雨污染物含量以及特征研究  

Study on Content and Characteristics of Rainfall Pollutants in Hefei City

作　　者：何昊 潘非凡 李丹丹 刘念 杨书运[1,2] He Hao;Pan Feifan;Li Dandan;Liu Nian;Yang Shuyun(College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China;Hefei Agricultural Environmental Science Observation and Experimental Station, Ministry of Agriculture, Hefei 230036, China)

机构地区：[1]安徽农业大学资源与环境学院,安徽合肥230036 [2]农业部合肥农业环境科学观测实验站,安徽合肥230036

出　　处：《环境科学与管理》2022年第2期23-26,共4页Environmental Science and Management

基　　金：国家重点研发计划子课题(编号:2017YFD0301301-1)。

摘　　要：降雨是大气污染物主要的湿沉降过程,为探究合肥地区降水污染物分布特征及其湿沉降的特征趋势。于2020年9月至2021年4月对合肥地区降水进行采集,测量降雨中硫酸根、总氮以及总磷含量,并分析雨水电导率、pH值以及氮沉降状况。结果表明降水中硫酸根含量的平均值为35.83 mg/L,因此合肥地区降水中硫酸盐含量较稳定,而冬季是防治大气硫污染物的关键时期。合肥降水中电导率明显高于中国背景点瓦里关山(2.126 mS/s),说明合肥市的降水污染需引起重视。合肥市降雨中的铵态氮/硝态氮(铵态氮与硝态氮的比值)的平均值为1.55,表明合肥市湿沉降中活性氮主要由于农业活动造成。本研究结果可为区域污染防治提供一定的参考意义。Rainfall is the main wet deposition process of atmospheric pollutants.The purpose of this study was to explore the distribution characteristics of precipitation pollutants in Hefei and their wet deposition trends.It collected precipitation in Hefei from September 2020 to April 2021,measured sulfate,total nitrogen,and total phosphorus content in rainfall.Rainwater conductivity,pH and nitrogen deposition were analyzed.The results showed that the average sulfate content in precipitation was 35.83 mg/L and the sulfate content in precipitation in Hefei was relatively stable.Winter is the key period for the prevention and control of atmospheric sulfur pollutants.The conductivity of precipitation in Hefei is significantly higher than that of China's Waliguan Mountain(2.126 mS/s),indicating that precipitation pollution in Hefei was relatively serious.The average value of ammonium nitrogen/nitrate nitrogen(the ratio of ammonium nitrogen to nitrate nitrogen)in rainfall in Hefei was 1.55,indicating that the active nitrogen in wet deposition in Hefei was mainly caused by agricultural activities.The results of this study could provide certain reference significance for regional pollution prevention and control.

关 键 词：降雨 大气污染物 湿沉降 氮 硫 

分 类 号：X511[环境科学与工程—环境工程]