摘要
在北京市近郊和远郊区采集大气中可吸入颗粒物样品,分析其汞的浓度水平.结果表明,近郊大气可吸入颗粒物中汞的浓度高于远郊区,分别为1.28±1.30ng.m-3和0.79±0.68ng.m-3,而且冬、春两季的浓度明显高于夏、秋两季.可吸入颗粒物中的汞主要分布在细粒子中,且细粒子富集汞的能力较粗粒子强.
Mercury concentrations in airborne inhalable particulate matters were measured at the urban and suburban sites in Beijing. The average concentrations of mercury in inhalable particles were 1.28 ±1.30 ng·m^-3with a range of 0. 21-5.76ng·m^-3 at the suburban site and 0. 79 ±0. 68ng·m^-3 with a range of 0. 11-3. 12ng·m^-3 at the urban site. The variations of mercury concentration at two sites were comparable, and the concentrations in winter and spring were higher than those in summer and autumn seasons. Mercury in fine particles was the main part of the total in PM10.
出处
《环境化学》
CAS
CSCD
北大核心
2007年第5期680-683,共4页
Environmental Chemistry
基金
国家自然科学基金(40473055)
中国科学院知识创新工程重要方向性项目(No.KZCX3-SW-443)资助项目
关键词
大气
可吸入颗粒物
汞
分布
airborne, inhalable particles, mercury, distribution.
