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贵阳市春、冬季大气颗粒物中铂族元素的污染特征
引用本文:张勇,董娴,漆亮,陈卓.贵阳市春、冬季大气颗粒物中铂族元素的污染特征[J].地球与环境,2018,46(3):251-256.
作者姓名:张勇  董娴  漆亮  陈卓
作者单位:遵义医学院医学与生物学研究中心;贵州师范大学化学与材料科学学院;贵阳市大气细粒子和大气污染化学重点实验室;中国科学院地球化学研究所矿床地球化学国家重点实验室
基金项目:国家自然科学基金项目(21767007);遵市科合社字(2017)10号。
摘    要:本文在贵阳市市中心区和郊区设置两个采样点位,采集春季和冬季PM_(10)、PM_(2.5)样品,在封闭溶样装置中采用HF和王水消解,利用电感耦合等离子体质谱法测定颗粒物中铂族元素的含量,研究了大气颗粒物中铂族元素的污染特征。结果表明,市中心区样品中铂族元素的浓度大于郊区,其含量与交通密度有关;与Pt和Rh相比,颗粒物中Pd的浓度更高,Pd具有较大的溶解性,可能会给人类健康带来更严重的危害;颗粒物中铂族元素的浓度呈现季节性变化,冬季大于春季。与国外其他城市相比,贵阳市大气颗粒物中铂族元素的污染程度较低,但这种潜在的重金属污染应引起重视。

关 键 词:大气颗粒物  铂族元素  电感耦合等离子体质谱法  污染特征
收稿时间:2017/3/17 0:00:00
修稿时间:2017/7/7 0:00:00

Contamination Characteristics of Platinum Group Elements in Atmospheric Particles in Spring and Winter of Guiyang
ZHANG Yong,DONG Xian,QI Liang,CHEN Zhuo.Contamination Characteristics of Platinum Group Elements in Atmospheric Particles in Spring and Winter of Guiyang[J].Earth and Environment,2018,46(3):251-256.
Authors:ZHANG Yong  DONG Xian  QI Liang  CHEN Zhuo
Institution:1. Medical and Biological Research center, Zunyi Medical College, Zunyi 563003, China;2. College of Chemistry and Material Science, Guizhou Normal University, Guiyang 550001, China;3. Guiyang key Laboratory of Atmospheric Fine Particles and Air Pollution Chemistry, Guiyang 550001, China;4. State Key Lab of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
Abstract:In order to understanding the contamination characteristics of platinum group elements (PGEs) in atmospheric particles of Guiyang, airborne PM10, PM2.5 were collected at two sampling sites (central area and suburb) in Guiyang from Winter to Spring. The samples were digested by HF and aqua regia in Teflon-stainless steel pressure bombs, and contents of platinum group elements were determined by inductively coupled plasma mass spectrometry. The results showed that the highest concentrations of PGEs were measured in samples from the central area site, which could be resulted from the heavy traffic near the center area site; compared to Pt and Rh, Pd, a higher risk element due to its high solubility, showed a much higher content in all samples; concentrations of PGEs exhibited an obviously seasonal variation, their concentrations were higher in Winter than in Spring. Although PGEs levels in atmospheric particles of Guiyang are rather low compared to those of other cities in the world, attentions should be given to prevent further contamination.
Keywords:atmospheric particle  Platinum group elements  ICP-MS  seasonal variation
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