摘要
以昌吉市为研究区,于2012年4—10月共采集10场次湿沉降样品,利用ICP-MS分析测定其中的金属元素。研究表明：每种金属元素在各场次降水中的浓度并不相同,其中Ca、Na、K、Mg平均浓度最高,分别达到8 956.30μg·L^-1、4 113.29μg·L^-1、899.03μg·L^-1、571.93μg·L^-1;Cd、Be、Tl、Hg、Th等的平均浓度最低,基本处于0.10-0.14μg·L^-1的范围。沙尘暴天气会使Na、Mg、Al、K、Ca、Mn、Fe、Se等地壳元素的湿沉降浓度显著升高,使Cr、Co、Ni、Cu、Zn、As、Cd、Sb、Ba、Hg、Tl、V、Pb等污染元素浓度有一定程度升高;但扬沙天气对各类金属元素湿沉降浓度影响不明显;无风沙天气时,湿沉降中金属元素浓度相对较低。沙尘天气会对城市大气金属元素湿沉降量产生一定影响,沙尘暴天气通过湿沉降对地壳元素的输入性要强于污染元素。大气金属元素湿沉降浓度存在显著的区域差异。
The purpose of this study was to investigate the effect of dust weather on metallic elements in atmospheric wet deposition in Xinjiang. We selected Changji City as the study area and collected samples from ten wet deposition processes during the period of April to October 2012. The samples were analyzed for metal concentrations by using Inductively Coupled Plasma-Mass Spectrometry（ ICP-MS）. The results showed that the concentrations of metallic elements varied in different atmospheric wet deposition processes,of which the average concentration of Ca,Na,K and Mg were relatively high,reached 8 956. 30 μg ·L^- 1,4 113. 29 μg·L^- 1,899. 03 μg·L- 1,571. 93 μg·L^- 1,respectively,while the average concentrations of Cd,Be,Tl and Hg were lower ranging from0. 10- 0. 14 μg·L^- 1. Sandstorms would significantly increase the concentrations of the metallic elements such as Na,Mg,Al,K,Ca,Mn,Fe and Se etc. in atmospheric wet deposition process. However,the blowing sand and dust had a few influence on the concentrations of metallic elements in wet deposition process. The concentrations of metallic elements in atmospheric wet deposition had obvious regional differences.
出处
《干旱区研究》
CSCD
北大核心
2015年第1期149-154,共6页
Arid Zone Research
基金
国家自然科学基金项目(41461090
41101497)
新疆青年科技创新人才项目(2014721009)
新疆自治区自然基金项目(2013211A034)资助
关键词
沙尘天气
大气
金属元素
湿沉降
昌吉市
新疆
dust weather
atmosphere
metallic elements
wet deposition
Changji City
Xinjiang
