摘要
于2017年11月采集武汉高校大气降尘样品106个,采用离子色谱仪分析样品中9种水溶性离子(F^(-)、Cl^(-)、NO_(3)^(-)、SO_(4)^(2-)、Na^(+)、NH_(4)^(+)、K^(+)、Mg^(2+)、Ca^(2+))的含量,用相关性分析和比值分析法解析其污染特征,用PCA-MLR模型初步探讨其来源及贡献率。结果表明:武汉高校降尘中主要水溶性离子为Ca^(2+)、SO_(4)^(2-)、NO_(3)^(-),平均浓度顺序为Ca^(2+)>SO_(4)^(2-)>NO_(3)^(-)>K^(+)>Na^(+)>Cl^(-)>Mg^(2+)>NH_(4)^(+)>F^(-),且F^(-)、Cl^(-)、NO_(3)^(-)、SO_(4)^(2-)、Na^(+)、K^(+)、Mg^(2+)、Ca^(2+)分布存在明显的空间质异性。m(NO_(3)^(-))/m(SO_(4)^(2-))为0.28,以固定源污染为主;降尘样品总体呈碱性。9种可溶性离子主要以NaCl、KCl、MgCl_(2)、Mg(NO_(3))_(2)、MgSO_(4)、Ca(NO_(3))_(2)、Ca SO_(4)等形式存在,主要来源于土壤/交通混合源、燃烧源、工业源,三者贡献率分别为8%、12%、80%。
There were 106 dustfall samples collected from Wuhan universities during November 2017.Nine types of watersoluble ions(F^(-),Cl^(-),NO_(3)^(-),SO_(4)^(2-),Na^(+),NH_(4)^(+),K^(+),Mg^(2+),Ca^(2+))were analyzed by ion chromatography.Correlation analysis and ratio analysis were used to analyze the pollution characteristics,and the PCA-MLR model was used to discuss its source and contribution rate.The results showed that the main water-soluble ions in dust reduction in Wuhan universities were Ca^(2+),SO_(4)^(2-)and NO_(3)^(-),and the average concentration order was Ca^(2+)>SO_(4)^(2-)>NO_(3)^(-)>K^(+)>Na^(+)>Cl^(-)>Mg^(2+)>NH_(4)^(+)>F^(-).There were obvious spatial qualitative differences in the distribution of F^(-),Cl^(-),NO_(3)^(-),SO_(4)^(2-),Na^(+),K^(+),Mg^(2+)and Ca^(2+).The mass ratio of NO_(3)^(-)/SO_(4)^(2-)was 0.28,which was dominated by fixed-source pollution;the dust-reducing samples were generally alkaline.Nine types of soluble ions existed mainly in forms of Na Cl,KCl,Mg Cl_(2),Mg(NO_(3))_(2),MgSO_(4),Ca(NO_(3))_(2),Ca SO_(4),etc.,mainly from soil/transport mixed sources,combustion sources,industrial source,and their contribution rates were 8%,12%and 80%,respectively.
作者
钟萍
汪昂绿
张慧迪
龚香宜
张家泉
张喜皓
胡宏元
田倩
ZHONG Ping;WANG Ang-lu;ZHANG Hui-di;GONG Xiang-yi;ZHANG Jia-quan;ZHANG Xi-hao;HU Hong-yuan;TIAN Qian(College of Resources and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;School of Environmental Science and Engineering,Hubei Polytechnic University,Huangshi 435003,China;Hubei Key Laboratory of Mine Environmental Pollution Control and Remediation,Huangshi 435003,China;Industrial Safety Engineering Technology Research Center of Hubei Province,Wuhan 430081,China;School of Environmental Studies,China University of Geosciences,Wuhan 430074,China)
出处
《环境工程》
CAS
CSCD
北大核心
2021年第2期98-104,共7页
Environmental Engineering
基金
国家重点研发计划项目(2017YFC0212602)
湖北省高等学校优秀中青年科技创新团队计划项目(T201729)。
关键词
高校
降尘
水溶性离子
污染特征
来源
universities
dustfall
water-soluble ions
pollution characteristics
sources
