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西宁市非采暖季和采暖季PM2.5中14种金属元素特征
A Preliminary Study on the Characteristics of 14 Metal Elements in PM2.5 during Non-Heating Season and Heating Season of Xining
投稿时间:2016-11-24  修订日期:2017-03-19
DOI:10.19316/j.issn.1002-6002.2018.02.04
中文关键词:  PM2.5  重金属  元素浓度  富集因子
英文关键词:PM2.5  heavy metals  concentration of element  enrichment factor
基金项目:
作者单位
陈珂 青海省环境监测中心站, 青海 西宁 810000 
窦筱艳* 青海省环境监测中心站, 青海 西宁 810000 
马伟 青海省环境监测中心站, 青海 西宁 810000 
文生仓 青海省环境监测中心站, 青海 西宁 810000 
叶景春 青海省西宁市环境监测站, 青海 西宁 810000 
石丽娜 青海师范大学化学系, 青海 西宁 810008 
赵旭东 青海省环境监测中心站, 青海 西宁 810000 
赵雪艳 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 
杨文 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 
通讯作者:窦筱艳*  青海省环境监测中心站, 青海 西宁 810000  
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中文摘要:
      于2012年11月采暖季和2013年9月非采暖季,在青藏高原典型城市西宁市4个采样点采集细颗粒物(PM2.5)样品,共获得40个有效样品。用微波消解-ICP-MS法、原子荧光法分析了样品中14种重点防控金属。结果表明:14种重点防控金属中Ag、Tl平均质量浓度为0.10~0.50 ng/m3,Co、Sb、Hg平均质量浓度为0.50~4.00 ng/m3,V、Cd、Cr、Ni、Cu、As平均质量浓度为4.00~50.0 ng/m3,Mn、Pb、Zn平均质量浓度为50.0~2 000 ng/m3。采样期间,采暖季相比非采暖季,PM2.5质量浓度有下降趋势,不同采样区金属元素浓度有增有减。富集因子分析结果表明,重点防控金属元素在非采暖季主要来源于土壤风沙扬尘、机动车尾气和工业排放,采暖季主要来源于土壤风沙扬尘、燃煤、燃油、机动车尾气和工业排放。非采暖季Zn、Ag、Cd、Hg、Tl和Pb富集因子较高,采暖季Zn、As、Ag、Cd、Sb、Hg、Tl、Pb富集因子较高,更容易受到人为源的影响。
英文摘要:
      In this study, 40 effective PM2.5 samples were collected in the north, the east, the west and the middle district of Xining, a typical city of Qinghai-Tibetan Plateau in Nov 2012 and Sep 2013. And then 14 kinds of metal ions in PM2.5 which was defined as key pollutants in China were analyzed by microwave-assisted digestion inductively coupled plasma(ICP-MS) and atomic fluorescence(AFS). The result showed that the average mass concentrations of Ag, Tl in PM2.5 were from 0.10 ng/m3 to 0.50 ng/m3, Co, Sb and Hg were from 0.50 ng/m3 to 4.00 ng/m3, V, Cd, Cr, Ni, Cu and As were from 4.00 ng/m3 to 50.0 ng/m3, Mn, Pb and Zn was from 50.0 ng/m3 to 2000 ng/m3.During the sampling period, compared with the non-heating season, the PM2.5 mass concentration showed a decreasing tendency, and the metal element concentration in different sampling area had different trend. Enrichment factor analysis showed that 14 kinds of metal ions in PM2.5 were primary from raise dust, vehicle exhausts and industrial emissions in non-heating season, and raise dust, fire coal, fuel, vehicle exhausts and industrial emissions in heating season. The enrichment factor of Zn, Ag, Cd, Hg, Tl, Pb in non-heating season and Zn, As, Ag, Cd, Sb, Hg, Tl, Pb in heating season was higher than other elements, which was more susceptible to the impact of human sources.
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