石河子市冬季城区与工业区PM_(2.5)中水溶性无机离子特征与来源  

Pollution characteristics and sources of water-soluble inorganic ions in PM_(2.5)in Shihezi Urban and industrial areas in winter

作　　者：李刚[1] 何友江[1] 李富强 刘艳 李维军 彭玉杰 刘雨鑫 高元官 LI Gang;HE Youjiang;LI Fuqiang;LIU Yan;LI Weijun;PENG Yujie;LIU Yuxin;GAO Yuanguan(State Key Laboratory of Environment Criteria and Risk Assessment,Chinese Research Academy of Environmental Science,Beijing,100012,China;Shihezi Ecology and Environment Bureau,the Eighth Division of Xinjiang Production and Construction Corps,Shihezi,832099,China;Shihezi Ecological and Environmental Monitoring Station,the Eighth Division of Xinjiang Production and Construction Corps,Shihezi,832099,China)

机构地区：[1]中国环境科学研究院,环境基准与风险评估国家重点实验室,北京100012 [2]第八师石河子市生态环境局,石河子832099 [3]石河子市生态环境监测站,石河子832099

出　　处：《环境化学》2023年第12期4117-4126,共10页Environmental Chemistry

基　　金：中央财政科技计划结余经费(2021-JY-20,2021-JY-18)资助。

摘　　要：为研究石河子市冬季PM2.5中水溶性无机离子(Water Soluble Inorganic Ions,WSIIs)的污染特征和来源,2020年12月和2021年1月在石河子市城区和工业区共布设2个采样点,采集PM2.5样品共122组,使用Dionex ICS-900分析仪对SO^(2-)_(4)、NO^(-)_(3)、Cl^(−)、F^(−)、、Na^(+)、K^(+)、Ca^(2+)和Mg^(2+)共9种WSIIs进行分析.结果表明,冬季石河子市城区PM2.5中WSIIs浓度为(107.18±50.66)μg·m^(−)3,在PM2.5中的占比为56.3%—67.2%,工业区PM2.5中WSIIs浓度为(85.32±35.56)μg·m^(−)3,在PM2.5中的占比为62.2%—63.0%,说明WSIIs是石河子市冬季PM2.5的主要成分,城区WSIIs浓度特征为:>>>Cl^(−)>Ca^(2+)>Na^(+)>F^(−)>K^(+)>Mg^(2+),工业区为:>SO^(2-)_(4)>NO^(-)_(3)>NH_(4)>Cl^(−)>Na^(+)>Ca^(2+)>F^(−)>K^(+)>Mg^(2+);城区大气PM2.5中SNA(、和)的浓度为(97.71±46.13)μg·m^(−)3,在WSIIs中的占比为91.2%±3.1%,工业区SNA的浓度为(76.97±32.87)μg·m^(−)3,在WSIIs中的占比为90.3%±2.7%,说明SNA为WSIIs的主要组分,同时也是PM2.5的主要组分;城区Cl^(−)的浓度低于工业区,Ca^(2+)浓度高于工业区,说明工业区受化石燃料燃烧影响较大,城区受扬尘影响较大;重度及以上污染天气,燃煤排放对PM2.5的贡献大于机动车,燃煤排放对城区的影响大于工业区;城区PM2.5中离子的主要组分为(NH4)2SO_(4)和NH4HSO_(4),工业区主要为(NH4)2SO_(4)、NH4HSO_(4)和NH4NO_(3),工业区、和之间具有高度同源性.To study the pollution characteristics and sources of water-soluble inorganic ions(WSIIs)in Shihezi city in winter,122 PM_(2.5)samples were collected in two sites of the urban areas and industrial areas from December 2020 to January 2021.The chromatography system(Dionex ics-900)was used to detect the cations and anions(SO^(2-)_(4),NO^(-)_(3),Cl−,F−,,Na^(+),K^(+),Ca^(2+)and Mg^(2+))of PM_(2.5).The results showed that,in winter the concentrations of WSIIs in urban areas and industrial areas were(107.18±50.66)μg·m−3 and(85.32±35.56)μg·m^(−3),respectively,and the proportion of that in PM_(2.5)were 56.3%—67.2%and 62.2%—63.0%,respectively.WSIIs were the main component of PM_(2.5)in Shihezi city in winter.The trend of ions concentrations in urban areas wereSO^(2-)_(4)>NO^(-)_(3)>Cl−>Ca^(2+)>Na^(+)>F−>K^(+)>Mg^(2+),and the urban areas were>>>Cl−>Na^(+)>Ca^(2+)>F−>K^(+)>Mg^(2+).The concentrations of SNA(,and)in urban and industrial areas were(97.71±46.13)μg·m^(−3)and(76.97±32.87)μg·m−3,respectively,and those accounted for 91.2%±3.1%and 90.3%±2.7%of WSIIs,respectively.The results indicated that SNA was the main component of WSIIs and PM_(2.5).The concentration of Cl−in urban areas was lower than that in industrial areas,and there was different result for Ca^(2+).The results indicated that the PM_(2.5)was greatly affected by fossil fuel combustion in industrial areas,while the PM_(2.5)in urban areas was greatly affected by dust.In severe pollution days,the contribution of coal-fired emission to PM_(2.5)was greater than that of motor vehicles,and the contribution of coal-fired emission in urban areas was greater than that of industrial areas.The main components of ions in urban areas were(NH4)2SO4 and NH4HSO4,and in industrial areas were mainly(NH4)2SO4,NH4HSO4 and NH4NO3,There was a high degree of homology between,and in industrial areas.

关 键 词：石河子 城区和工业区 PM2.5 水溶性无机离子 冬季. 

分 类 号：X513[环境科学与工程—环境工程]