太原市冬季PM_(2.5)中砷和汞的污染特征分析  

The Analysis of PM_(2.5) Arsenic and Mercury Pollution Character in Winter of Taiyuan City

作　　者：张祥玉 王振涛 高少龙 Zhang Xiangyu;Wang Zhentao;Gao Shaolong(College of Environment and Resources,Taiyuan University of Science and Technology,Taiyuan Shanxi 030024,China;Department of Environmental and Safety Engineering,Taiyuan Institute of Technology,Taiyuan Shanxi 030008,China)

机构地区：[1]太原科技大学环境与资源学院,山西太原030024 [2]太原工业学院环境与安全工程系,山西太原030008

出　　处：《山西化工》2025年第2期263-266,共4页Shanxi Chemical Industry

基　　金：山西省基础研究计划资助项目(202203021212337);太原工业学院引进人才科研资助项目(2022KI021);来晋工作优秀博士(后)科研资助项目(2022LJ030);山西省高等学校科技创新项目(20221536)。

摘　　要：为了研究太原市冬季大气细颗粒物PM_(2.5)砷和汞的污染特征,本文利用超声波提取技术,采用原子荧光分光光度计对砷和汞进行了测定。结果表明,采样期间PM_(2.5)中总砷、总汞日均质量浓度分别为34.7(±17.3)ng/m^(3)和1.50(±0.77)ng/m^(3),水溶性砷、汞日均质量浓度分别为19.69(±10.05)ng/m^(3)和0.068(±0.033)ng/m~3。总砷、总汞质量浓度与主要影响因素的相关分析和统计检验结果表明,昼、夜间总砷、汞浓度变化不存在显著性差异(P>0.05);风速与砷、汞浓度均呈高度显著负相关(P<0.01);相对湿度与砷、汞浓度均呈显著正相关(P<0.05)。PM_(2.5)中砷、汞形态分析和生物可利用性分析结果显示,PM_(2.5)中砷的有机物结合态比例最高,残渣态最低;汞以铁锰氧化物结合态比例最高,可交换态最低;砷、汞潜在可利用态的占比最高,砷的生物可利用性大于汞。与国内外其他城市和地区相比,太原市冬季PM_(2.5)总砷、汞污染水平较高,其潜在可利用态比例较高,对健康的影响应引起高度重视。To study the PM_(2.5) arsenic and mercury pollution character in winter of Taiyuan City,this research determined the concentrations of the arsenic and mercury by using ultrasonic extraction technology and atomic fluorescence spectrophotometer.The results showed that during the sampling period,the daily mean concentrations of total arsenic and mercury were 34.7(±17.3)ng/m^(3) and 1.5(±0.77)ng/m^(3) respectively.The daily mean concentrations of water-soluble arsenic and mercury were 19.69(±10.05)ng/m^(3) and 0.068(±0.033)ng/m^(3) respectively.The correlation analysis and the results of statistical analysis of arsenic and mercury showed that no significant difference was observed in day-night arsenic and mercury concentrations fluctuations during the sampling period(P>0.05).There was significantly negative correlation between wind speed and arsenic and mercury concentrations(P<0.01).Arsenic and mercury concentration are positively correlated with relative humidity(P<0.05).The analysis of different forms and bioavailability of As and Hg indicated that the percentage of organic binding species in PM_(2.5) arsenic was highest,while residual species lowest.The percentage of Fe-Mn oxides bound in PM_(2.5) mercury was highest,while exchangeable fractions lowest.Potential available fractions was the highest in both arsenic and mercury.The bioavailability of As was higher than Hg.Conclusion:Compared with other cities and regions,arsenic and mercury in PM_(2.5) pollution was serious during the heating period in Taiyuan.Potential available fraction was high in both arsenic and mercury,so high attention must be paid on it.

关 键 词：PM_(2.5) 砷 汞 形态 

分 类 号：X511[环境科学与工程—环境工程]