2017—2022年春节期间西宁市细颗粒物(PM_(2.5))中水溶性离子污染特征研究  

Study on the pollution characteristics of water-soluble ions in PM_(2.5)during the Spring Festival of Xining City in 2017-2022

作　　者：胡晓峰[1] 尹永正 修光利[2] 宋维君[1] 巢世军 HU Xiaofeng;YIN Yongzheng;XIU Guangli;SONG Weijun;CHAO Shijun(School of Chemical Engineering,Qinghai University,Xining Qinghai 810016;State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Processes,School of Resources&Environmental Engineering,East China University of Science and Technology,Shanghai 200237;Qinghai Research and Design Institute of Environmental Sciences,Xining Qinghai 810007)

机构地区：[1]青海大学化工学院,青海西宁810016 [2]华东理工大学资源与环境工程学院,国家环境保护化工过程环境风险评价与控制重点实验室,上海200237 [3]青海省环境科学研究设计院,青海西宁810007

出　　处：《环境污染与防治》2023年第8期1144-1149,1168,共7页Environmental Pollution & Control

基　　金：青海省自然科学基金资助项目(No.2020-ZJ-702)。

摘　　要：2017—2022年春节期间在西宁市市区设置采样点采集细颗粒物(PM_(2.5))样品,利用离子色谱法(IC)测定PM_(2.5)中水溶性离子。结果表明:2017—2022年西宁市春节期间PM_(2.5)的日平均质量浓度分别为(95.4±88.5)、(58.9±15.5)、(50.8±12.5)、(44.8±9.6)、(44.0±18.7)、(43.9±18.3)μg/m^(3),西宁市春节期间PM_(2.5)的日平均浓度及其中水溶性离子呈逐年下降趋势。2019年西宁市实施烟花爆竹燃放管理措施对PM_(2.5)影响较为显著。西宁市春节期间PM_(2.5)中阴离子当量/阳离子当量(AE/CE)的平均值在1上下波动,PM_(2.5)的酸碱性大多呈现中性及弱碱性。主成分分析显示,西宁市春节期间PM_(2.5)的主要源为二次转化、工业排放、沙尘及燃烧源。During the Spring Festival of 2017-2022,PM_(2.5)samples were collected at the urban area of Xining City,and ion chromatography(IC)was used to determine the water-soluble ions in PM_(2.5).The results showed that the average daily concentrations of PM_(2.5)during the Spring Festival in Xining City during 2017-2022 were(95.4±88.5),(58.9±15.5),(50.8±1_(2.5)),(44.8±9.6),(44.0±18.7),(43.9±18.3)μg/m^(3),respectively,the daily average concentration of PM_(2.5)and its water-soluble ions decreased gradually during the Spring Festival in Xining City.The implementation of fireworks and firecrackers management in Xining City had a significant impact on PM_(2.5)in 2019.The average value of anion equivalents/cation equivalents(AE/CE)in PM_(2.5)in Xining City fluctuated around 1 during the Spring Festival,and the acidity and alkalinity of PM_(2.5)in Xining City were generally neutral and alkaline.The results of the principal component analysis indicated that the water-soluble ions of PM_(2.5)in Xining City were mainly derived from secondary particles,industrial sources,sand dust and biomass burning.

关 键 词：春节期间 水溶性离子 污染特征 

分 类 号：X513[环境科学与工程—环境工程]