摘要
通过观测南京北郊宁六高速公路及学校气象观测场大气降尘,对降尘通量以及降尘离子进行了分析。结果表明,南京北郊降尘通量变化范围在5.60～39.09μg/(cm2.d),季节变化明显,公路边降尘通量为观测场的1.4倍;观测场内降尘粒径峰值集中在2～20μm范围,公路边的降尘粒径集中在20～50μm;降尘中硫酸根、钠离子、硝酸根、钙离子的含量分别高达1 112、390、206、137 mg/kg。
This article analyzed the dust-fall flux and dust-fall ion Characteristics by observing atmospheric dust-fall on Ning Liu Highway and school meteorological observation field of northern suburb of Nanjing.The dust-fall flux of northern suburb of Nanjing city was 5.60-39.09 μg/（cm2·d） during the study period with seasonal change obviously.The dust-fall flux on the side of the road was 1.4 times larger than the observed field.The peak of dust particles size in the observation field was 2-20 μm,and it was 20-50 μm in the side of highway.The levels of sulphate ions,sodion,nitrate ions and calcium ions in dust-fall were as high as 1 112,390,206,137 mg/kg.
出处
《宁夏农林科技》
2012年第10期165-168,182,F0002,共6页
Journal of Ningxia Agriculture and Forestry Science and Technology
关键词
降尘
粒度
离子色谱
后向轨迹
Dust-fall
Particle size
Ion chromatography
Back trajectory
