摘要
为探究邯郸市近5年冬季PM_(2.5)污染特征及来源,于2016~2020年冬季采集PM_(2.5)样品,对8种水溶性无机离子进行分析,利用主成分分析(PCA)模型解析污染源类型,选用后向轨迹和潜在源贡献因子(PSCF)模拟传输轨迹和污染来源.结果表明,2018年冬季PM_(2.5)浓度最高,较2016、2017、2019和2020年升高60.44%、25.46%、91.43%和21.53%;2020年冬季水溶性无机离子(WSIIs)浓度较2016年下降18.86%,WSIIs/PM_(2.5)降至26.69%.夜晚ρ(PM_(2.5))(110.20~209.65μg·m^(-3))高于白天(95.21~193.00μg·m-3),NO_(3)^(-)和NH_(4)^(+)浓度夜间涨幅更大,SO_(4)^(2-)相反,Cl^(-)浓度和占比逐年下降;2020年冬季白天K^(+)、Ca^(2+)、Na^(+)和Mg^(2+)浓度较2018年下降69.72%、97.10%、90.91%和74.51%,夜晚下降66.67%、95.38%、91.67%和77.78%.2020年污染日NO_(3)^(-)、SO_(4)^(2-)和NH_(4)^(+)浓度是非污染日的4.90、5.80和5.20倍,涨幅为5年间最大.PCA结果表明,污染源主要为:二次源、燃煤源、生物质燃烧源、道路和建筑扬尘.后向轨迹和PSCF分析结果表明,冬季蒙古国中南部-内蒙古中部污染传输持续存在,2016年和2017年冬季受河南北部-邯郸和河北中部-邯郸的传输影响,2018~2020年冬季受后者影响较大.
To explore the characteristics and sources of PM_(2.5) pollution in winter of Handan City in the past five years,PM_(2.5) samples were collected in winter of 2016 to 2020,and eight types of water-soluble inorganic ions were analyzed.The principal component analysis(PCA)model was used to analyze the types of pollution sources,and the backward trajectory and potential source contribution factor(PSCF)were used to simulate the transport trajectory and pollution sources.The results showed that the PM_(2.5) concentration in winter of 2018 was the highest,increasing by 60.44%,25.46%,91.43%,and 21.53%compared with that in 2016,2017,2019,and 2020,respectively.In the winter of 2020,the concentration of water-soluble inorganic ions(WSIIs)decreased by 18.86% compared with that in 2016,and WSIIs/PM_(2.5) decreased to 26.69%.The PM_(2.5) concentration(110.20-209.65μg·m^(-3))at night was higher than that in the daytime(95.21-193.00μg·m^(-3)).The concentration of NO_(3)-and NH_(4)^(+)increased more at night.On the contrary,the concentration and proportion of Cl^(-)decreased annually.In the winter of 2020,the daytime concentrations of K^(+),Ca^(2+),Na^(+),and Mg^(2+)decreased by 69.72%,97.10%,90.91%,and 74.51%compared with that of 2018,and the night concentrations decreased by 66.67%,95.38%,91.67%,and 77.78%,respectively.In 2020,the concentrations of NO_(3)-,SO_(4)^(2-),and NH_(4)^(+)on polluted days were 4.90,5.80,and 5.20 times those on non-polluted days,with the largest increase in five years.PCA results showed that the main sources of pollution were secondary sources,coal sources,biomass combustion sources,and road and building dust.The backward trajectory and PSCF analysis results showed that pollution transport continued to exist between south-central Mongolia and central Inner Mongolia in winter and was influenced by the transport between northern Henan and Handan and central Hebei and Handan in winter of 2016 and 2017,whereas the latter had a greater impact in winter of 2018-2020.
作者
牛红亚
高娜娜
鲍晓磊
胡伟
胡偲豪
吴春苗
马心怡
纪晓腾
樊景森
王金喜
NIU Hong-ya;GAO Na-na;BAO Xiao-lei;HU Wei;HU Si-hao;WU Chun-miao;MA Xin-yi;JI Xiao-teng;FAN Jing-sen;WANG Jin-xi(School of Earth Sciences and Engineering,Hebei University of Engineering,Handan 056038,China;Hebei Chemical Industry Volatile Organic Compounds Detection and Treatment Technology Innovation Center,Hebei Chemical&Pharmaceutical College,Shijiazhuang 050026,China;School of Earth System Science,Tianjin University,Tianjin 300072,China)
出处
《环境科学》
EI
CAS
CSCD
北大核心
2023年第12期6463-6473,共11页
Environmental Science
基金
国家自然科学基金项目(41807305,41977183)
河北省自然科学基金项目(D2021402004)
大气重污染成因与治理攻关项目(DQGG202110)
河北省化工行业挥发性有机物检测与治理技术创新中心开放课题项目(ZXJJ20210402)
河北省中央引导地方科技发展资金项目(236Z3702G)。
关键词
PM_(2.5)
水溶性离子
二次转化
后向轨迹
源解析
PM_(2.5)
water-soluble ion
secondary transformation
backward trajectory
sources apportionment
