榆林窟大气颗粒物中水溶性离子化学特征及来源分析
Analysis on Chemical Characteristics and Source of Water-Soluble Ions in Atmospheric Particulate Matter in Yulin Grottoes
刘晓燕 1袁丽艳 1巴淑萍 1王贵 1向国立1
作者信息
- 1. 甘肃省酒泉生态环境监测中心,甘肃 酒泉 735000
- 折叠
摘要
本试验以榆林窟可吸入颗粒物(PM10)为研究对象(2022 年 8 月至 2023 年 6 月),重点考察其水溶性离子的污染特征,并对污染来源进行简要分析.研究表明,榆林窟PM10 中 9 种水溶性离子浓度的排序为SO42-＞Ca2+＞Cl-＞NO3-＞Na+＞K+＞Mg2+＞NH4+＞F-;SO42-、Ca2+、Cl-、NO3-和 Na+ 占 离 子总量的 92.8%;硫氧化率(Sulfur Oxidation Rate,SOR)和氮氧化率(Nitrogen Oxidation Rate,NOR)年均值说明PM10 中SO42-和NO3-主要为二次转化.因子分析表明,PM10 中水溶性离子主要来源于盐渍土扬尘、榆林窟崖体扬尘和二次气溶胶.
Abstract
This experiment takes inhalable particulate matter(PM10)from Yulin Grottoes as the research object(August 2022 to June 2023),focusing on the pollution characteristics of water-soluble ions,and briefly analyzing the sources of pollution.Research has shown that the order of nine water-soluble ion concentrations in PM10 in Yulin Grottoes is SO42-＞Ca2+＞Cl-＞NO3-＞Na+＞K+＞Mg2+＞NH4+＞F-;SO42-,Ca2+,Cl-,NO3-,and Na+ account for 92.8%of the total ion content;the annual average values of Sulfur Oxidation Rate(SOR)and Nitrogen Oxidation Rate(NOR)indicate that SO42-and NO3-in PM10 are mainly secondary conversions.Factor analysis shows that water-soluble ions in PM10 mainly come from saline soil dust,Yulin Grottoes cliff dust,and secondary aerosols.
关键词
榆林窟/大气颗粒物/水溶性离子/来源Key words
Yulin Grottoes/atmospheric particulate matter/water-soluble ions/source引用本文复制引用
基金项目
甘肃省科技厅科研项目(22JR5RA743)
出版年
2024
国家科技期刊平台
NSTL
万方数据