摘要
依据1989—2003年监测数据,分析了西安市大气中硫酸盐的时空变化.结果表明,西安市大气中硫酸盐年内变化呈“U”字形,冬季最大,春季次之,夏秋季最低.以2001年为时间界,年际变化呈先升后降趋势.2001年前大气中硫酸盐含量为工业区≥商业区≥居住区,之后转化为商业区≥居住区≥工业区.硫酸盐年内年际变化与二氧化硫(SO2)和降尘(Falling Dust,FD)具有较强相关性,表明西安市大气中硫酸盐形成的主要途径为颗粒物表面的催化和氧化.
Using monitored data of air sulphation speed for 1989-2003, the space-time change in Xi＇ an City is analyzed. The results are follow： the curve of air sulphation speed within a year forming a ＂U＂ figure, the top value is in Winter, the next is in Spring, the lowest is in Summer and Autumn. The annual change of sulphation speed is ascended before 2001 and then descended. The spatial distribution of sulphation speed was that the concentration in industrial area is beyond in shopping center and in residential area, and then the shopping center is placed in the middle before 2001, The following trend is the shopping center greater than that in residential area and than in industrial area. The relativity between the change of air sulphation speed from annual and within a year and that of SO2 and FD was comparatively remarkable. The approach shows SO2 changing into sulphation is mainly catalytic oxidation on the surface of FD in Xi＇an City.
出处
《陕西师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2006年第3期101-104,共4页
Journal of Shaanxi Normal University：Natural Science Edition
基金
国家自然科学基金资助项目(40271052)
关键词
硫酸盐
时空变化
大气污染
air sulphation speed
space-time change
air pollution
