摘要
于2021年7月至12月,为揭示呼和浩特市城区环境空气颗粒物中重金属含量时间分布特征,使用中流量大气采样器采集环境空气中PM_(10)、PM_(2.5)样品,选择毒性效应较强的Cr、Mn、Fe、Ni、Cu、As、Cd和Pb等8种重金属作为研究对象,采用ICP-MS测定了其含量。结果表明:(1)2021年7月至12月,除Cu以外,其他重金属在PM_(10)和PM_(2.5)中的质量浓度变化趋势基本相同;(2)PM_(10)中Cr、Pb呈现出冬季>夏季>秋季的特点;Mn、Fe、As呈现出冬季>秋季>夏季的特点;Cu、Cd呈现出夏季>冬季>秋季的特点;Ni呈现出秋季>夏季>冬季的特点;PM_(2.5)中Cr、Mn、Fe、As、Cd、Pb呈现出冬季>秋季>夏季的特点;Ni的季节变化与PM_(10)相同,即秋季>夏季>冬季的特点;Cu呈现出秋季>冬季>夏季的特点。PM_(10)和PM_(2.5)中Cr、Mn、Fe、As、Pb均呈现出冬季质量浓度高的共性特点。
From July to December 2021,in order to reveal the temporal distribution characteristics of heavy metal content in ambient air particles in urban Hohhot,a mid-flow atmospheric sampler was used to collect PM_(10) and PM_(2.5)samples in ambient air,and eight heavy metals with strong toxicity effects,such As Cr,Mn,Fe,Ni,Cu,AS,Cd and Pb,were selected as research objects.The content was determined by ICP-MS.The results showed that:(1)the mass concentrations of other heavy metals except Cu in PM_(10) and PM_(2.5) showed the same trend from July to December 2021;(2)The characteristics of Cr and Pb in PM_(10) were winter>summer>autumn;Mn,Fe and As showed the characteristics of winter.>autumn>summer;Cu and Cd showed the characteristics of summer>winter>autumn;Ni showed the charac-teristics of autumn>summer>winter;In PM_(2.5),Cr,Mn,Fe,As,Cd and Pb show the characteristics of winter>autumn>summer;The seasonal variation of Ni is the same as that of PM_(10),that is,the characteristics are autumn>summer>winter;Cu presents the characteristics of autumn>winter>summer;Cr,Mn,Fe,As and Pb in PM_(10) and PM_(2.5) all show the common characteristics of high mass concentration in winter.
作者
丁艳旭
包海
DING Yan-Xu;BAO Hai(College of Chemistry and Environment Science,Inner Mongolia Normal University,Hohhot 010022,China;Inner Mongolia Key Laboratory of Environmental Chemistry,Hohhot 010020,China)
出处
《内蒙古石油化工》
CAS
2023年第3期22-25,共4页
Inner Mongolia Petrochemical Industry
基金
内蒙古自治区自然科学基金资助项目(2022MS020003)
内蒙古师范大学研究生创新基金项目(CXJJS21138)。
