CAJ | 학술논문

2012年8月~2013年7月,在北京市包括城市背景、城区、郊区以及边界传输点在内的9个监测点位进行大气细颗粒物PM2.5样品的采集与分析,共获得486个有效样本及9种水溶性离子的质量浓度.观测期间9种水溶性离子总质量浓度为60.5 μg·m-3,浓度水平高低顺序分别为NO3-﹥SO2-4﹥NH4＋ -﹥Cl-﹥Na＋﹥K＋﹥Ca2＋﹥F-﹥Mg2＋；其中SO2-4、 NO3-和NH4＋(三者简称SNA)占全部所测水溶性离子的88％；NO3-是全年波动范围最大的二次离子.对所测阴、阳离子相关性研究发现,阴、阳离子总体相关性良好,春、冬季阴、阳离子相关性要好于夏、秋季.对不同颗粒质量级别中的水溶性离子研究发现,SNA积累活跃,相对于SO2-4的积累,NO3-和NH4＋在二次离子的形成过程中占据主导地位； NO3-是重污染过程累积效应比较明显且贡献相对较高的二次离子.
2012년8월~2013년7월,재북경시포괄성시배경、성구、교구이급변계전수점재내적9개감측점위진행대기세과립물PM2.5양품적채집여분석,공획득486개유효양본급9충수용성리자적질량농도.관측기간9충수용성리자총질량농도위60.5 μg·m-3,농도수평고저순서분별위NO3-﹥SO2-4﹥NH4＋ -﹥Cl-﹥Na＋﹥K＋﹥Ca2＋﹥F-﹥Mg2＋；기중SO2-4、 NO3-화NH4＋(삼자간칭SNA)점전부소측수용성리자적88％；NO3-시전년파동범위최대적이차리자.대소측음、양리자상관성연구발현,음、양리자총체상관성량호,춘、동계음、양리자상관성요호우하、추계.대불동과립질량급별중적수용성리자연구발현,SNA적루활약,상대우SO2-4적적루,NO3-화NH4＋재이차리자적형성과정중점거주도지위； NO3-시중오염과정루적효응비교명현차공헌상대교고적이차리자.
A total of 486 daily PM2. 5 samples were collected at a background site, 3 urban sites, 4 suburban sites and a boundary transfer site during August 2012-July 2013. Mass concentrations of 9 water-soluble ions were obtained. The average mass concentration of the 9 ions was 60. 5 μg·m-3 , and the order of concentration of ions was NO3- ﹥SO2-4 ﹥NH4+ - ﹥Cl- ﹥Na+ ﹥K+ ﹥Ca2+ ﹥F- ﹥Mg2+; Secondary inorganic species NO3-, SO2-4 and NH4+ were the major components of water-soluble ions in PM2. 5 , with a contribution of 88% to the total ions of PM2. 5 . NO3- was the most fluctuated anion during the sampling period. With the increase of pollution level, the accumulation of SNA was obvious, the components that contained nitrogen, NO3- and NH4+, occupied the dominant position in the formation of the secondary components. NO3- had a relatively higher contribution to the accumulation of heavy pollution.