节点文献
长沙市区PM2.5中致癌重金属铅、镉的污染特征与季节性变化研究
Study on Pollution Characteristics and Seasonal Change of Pb and Cd in Heavy Metals of PM2.5 in Changsha City
【摘要】 2015年3月至2016年2月期间,在春夏秋冬四个季度,每个季度在长沙城区采样15天,每天连续采样20小时,共采集PM2.5有效样品60个。分析测试结果表明:长沙监测点PM2.5样品中Pb和Cd年平均浓度分别为4.24ng/m3和132.44ng/m3,对照《环境空气质量标准》（GB3095-2012）中年平均浓度限值,PM2.5样品中Pb年平均浓度远低于标准值,PM2.5样品中Cd年平均浓度则超过标准值25倍。其中冬季PM2.5样品中Pb和Cd质量浓度平均值均显著高于其它季节。对比北京、上海、广州、重庆等国内主要城市,长沙PM2.5样品中Pb年平均浓度处于较低水平;而Cd年平均浓度处于较高水平。
【Abstract】 From March 2015 to February 2016,by sampling 20 hours a day,15 days each season,60 effective PM2.5samples of Changsha City were collected in total. The analysis results show that the average concentration of Pb and Cd in Changsha monitoring samples were 4. 24ng/m3 and 132. 44ng/m3. The average concentration of Pb in PM2.5samples is far below the standard value,and the average concentration of Cd in PM2.5samples is 25 times higher than the standard value. The average of Pb and Cd in winter PM2.5samples were higher than those of other seasons. Comparing Beijing,Shanghai,Guangzhou,Chongqing and other major cities,the average concentration of Pb in PM2.5samples in Changsha is at a low level; The average annual concentration of Cd is at a higher level.
【Key words】 Changsha City； PM2.5； Pb and Cd； Pollution Characteristics； Seasonal Change；
- 【文献出处】 环境与可持续发展 ,Environment and Sustainable Development , 编辑部邮箱 ,2017年02期
- 【分类号】X513
- 【被引频次】12
- 【下载频次】222