长春市大气颗粒汞及其干沉降通量  

Atmospheric Particulate Mercury Concentration in Changchun City and Its Dry Deposition Flux

作　　者：方凤满[1] 王起超[1] 李东侠 赵国君 汪丽英 

机构地区：[1]中国科学院长春地理研究所,长春130021 [2]长春市环境监测中心站,长春130022

出　　处：《环境科学》2001年第2期60-63,共4页Environmental Science

基　　金：国家"九五"科技攻关项目! (96 911 0 5 0 5 ) ;中国科学院长春地理所所长基金

摘　　要：在 1 999 0 7～ 2 0 0 0 0 1 ,监测了长春市 5个功能区及一个对照点的大气颗粒汞浓度 .非采暖期 ,市区颗粒汞浓度范围为 0 0 2 2ng·m- 3～ 0 398ng·m- 3,平均为 0 1 4 5ng·m- 3,对照点平均为 0 0 84ng·m- 3.采暖期 ,市区颗粒汞浓度范围为 0 1 4 8ng·m- 3～ 1 984ng·m- 3,平均为 0 4 61ng·m- 3,对照点平均为 0 2 1 1ng·m- 3.采暖期颗粒汞浓度平均超出非采暖期 2倍以上 .燃煤与地面扬尘是大气颗粒汞的 2个主要来源 .地面扬尘对颗粒汞的贡献约占 8%～ 30 % .应用理论模型估算汞的干沉降通量 ,市区颗粒汞干沉降通量为 4 3 0 6μg·(m2 ·a) - 1,对照点为2 1 2 8μg·(m2 ·a) - 1.From July 1999 to January 2000, the particulate mercury(Hg (p) ) concentration of five function sites and one contrast site were determinated. In non\|heating time, the particulate mercury concentration in urban atmosphere ranged from 0 022 to 0 398 ng·m -3 with an average of 0 145 ng·m -3 and the contrast site with an average of 0 084 ng·m -3 . In heating time , the Hg (p) concentration in urban was in the range of 0 148～1 984 ng·m -3 with an average of 0 461 ng·m -3 and with an average of 0 211 ng·m -3 in the contrast site. The Hg (p) concentration in heating time was two times higher than that of non heating time. Coal fire and wind blown soil material were the two important sources of Hg (p) . Wind blown soil material contributed 7 9%～38 5% of the Hg(p) with an average of 24 1% in urban . Use theory model to estimate the dry deposition flux with the results of 43 06μg·(m 2·a) -1 in urban and 21 28μg·(m 2·a) -1 in the contrast site.

关 键 词：颗粒汞 干沉降通量 大气环境 长春市 大气污染物 

分 类 号：X131.1[环境科学与工程—环境科学] X513