摘要
针对北方部分地区大气粉尘进行的粒度、成分、物相和形貌特性分析表明,大气粉尘中微小颗粒集中分布在0.3μm^5μm内,小于2μm的超过85%,粉尘主要以S i,A l,F e,C a等风砂和土壤的地壳元素,矿物相主要为石英,钠长石,方解石,绢云母。颗粒呈无规则形的团、块状,颗粒表面高低不平或有冲刷痕迹或有小孔。K,N a的含量较低,S iO2的含量很高。不同性质的粉尘在水溶液中其pH值变化趋势不尽相同,大气粉尘在水溶液里的电离受粉尘的成分、粒度和表面吸附的协同作用。
This article describes the characteristics of atmospheric dusts,such as size distribution, chemical components, phases and morphological observation, and the electrochemistry characteristics of dusts in aqueous are also studied. Results indicate that the fine particles are mainly in the range of 0.3 μm-5 μm,of which the dusts of less than 2 μm are over 85%. The chemical composition of atmospheric dusts is characteristic of high SiO2 and low K2O, Na2O. Dusts are mainly composed of Si,Al,Fe,Ca elements and of blown sand and soil,and the main phases are quartz,albitez,calcite and sericite. SEM observations show that the dusts are mainly irregular shaped,and the surface is rough because of erosion mark or pores on them. The pH variation trend of dust/aqueous is different for different dusts. The ionization of dusts in aqueous is affected by a combination of effects such as component ,size and the action of surface adsorption.
出处
《矿物岩石》
CAS
CSCD
北大核心
2005年第3期114-117,共4页
Mineralogy and Petrology
基金
国家自然科学基金(40072020)
"教育部优秀青年教师奖"资助项目
关键词
大气粉尘
特征分析
电化学特性
atmospheric dusts
characteristic analysis
electrochemistry characteristics
