沈阳冬季PM_(2.5)中水溶性离子变化特征及来源分析  

Variation characteristics and source analysis of water-soluble ions in PM_(2.5) during winter in Shenyang

作　　者：卞思思 赵帝[2,3] 王维宽 刘岩[1,2] 惠宇 王小娜 BIAN Sisi;ZHAO Di;WANG Weikuan;LIU Yan;HUI Yu;WANG Xiaona(Shenyang Environmental Testing Technology Co.,Ltd.,Shenyang 110067,China;Shenyang Academy of Environmental Sciences,Shenyang 110067,China;Liaoning Provincial Key Laboratory of Atmospheric Environmental Pollution Prevention and Control,Shenyang 110067,China)

机构地区：[1]沈阳环科检测技术有限公司,辽宁沈阳110067 [2]沈阳环境科学研究院,辽宁沈阳110067 [3]辽宁省城市大气环境污染防治重点实验室,辽宁沈阳110067

出　　处：《环境保护科学》2021年第3期129-132,共4页Environmental Protection Science

基　　金：国家重点研发计划项目(2017YFC0212500)。

摘　　要：为了研究沈阳冬季PM_(2.5)中各水溶性离子变化特征及来源,该研究分别于2016年~2019年每年的1月间,在沈阳市南十东路点位采集了PM_(2.5)样品,并采用DX-120型离子色谱仪对样品中的水溶性离子进行了分析。结果表明,水溶性离子约占PM_(2.5)浓度的1/3左右,其中NO_(3)^(−)、SO_(4)^(2−)、NH_(4)^(+)、Cl^(−)和K^(+)这5种离子浓度较高;NO_(3)^(−)浓度与PM_(2.5)变化趋势基本一致,对PM_(2.5)浓度影响最大。主成分分析结果表明,沈阳冬季PM_(2.5)中的水溶性离子主要来源为4大类,其中燃煤源+机动车尾气源约为54.0%,生物质燃烧源约为19.8%,工业源约为10.4%,扬尘源约为7.2%。In order to study the characteristics and sources of the water-soluble ions in PM_(2.5) during winter in Shenyang,PM_(2.5) samples were collected at“Nanshidong Road”site in January of every year from 2016 to 2019.The water-soluble ions in the samples were analyzed by DX-120 Ion Chromatograph.The results showed that the water-soluble ions accounted for about one third of the total concentration of PM_(2.5).The concentrations of NO_(3)^(−)、SO_(4)^(2−)、NH_(4)^(+)、Cl^(−)、K^(+)were higher than that of other ions.There was the same variation trend for the concentration of NO_(3)^(−)and PM_(2.5).The PM_(2.5) concentration was mainly affected by the NO_(3)^(−)concentration.Factor analysis results showed that the water-soluble ions mainly sourced from four categories,including the sources of fire coal and vehicle exhaust,biomass combustion,industry and dust with the percentage of 54.0%,19.8%,10.4%and 7.2%,respectively.

关 键 词：沈阳市 PM_(2.5) 冬季 水溶性离子 来源解析 

分 类 号：X830[环境科学与工程—环境工程]