CAJ | 학술논문

2008年9月29日-10月15日使用大气细颗粒物快速捕集系统实时、在线分析了济南秋季PM_(2.5)中水溶性离子的质量浓度,并结合气象资料和部分前体物(SO_2,NO_x和O_3)浓度进行了相关分析.结果表明:济南秋季燃煤污染严重,SO_4~(2-),NO_3~-和NH_4~+是大气PM_(2.5)中水溶性离子的主要组分,三者质量浓度之和占总水溶性离子(TWSI)质量浓度的90%以上;SO_4~(2-)污染物主要受远距离传输的影响,NO_3~-和NH_4~+污染物主要受局地源的影响;SO_4~(2-)和NO_3~-的昼夜形成机理不同,它们的形成过程主要受相对湿度、温度和O_3浓度的影响.周边地区生物质燃烧导致了济南重污染天气的产生,降水对污染物的清除作用较强.对比土壤和海盐中各种离子的质量浓度比可知,济南秋季PM_(2.5)中的K~+受生物质燃烧的影响较大,Cl~-主要来源于海盐和生物质燃烧,Na~+主要来源于海盐.
2008년9월29일-10월15일사용대기세과립물쾌속포집계통실시、재선분석료제남추계PM_(2.5)중수용성리자적질량농도,병결합기상자료화부분전체물(SO_2,NO_x화O_3)농도진행료상관분석.결과표명:제남추계연매오염엄중,SO_4~(2-),NO_3~-화NH_4~+시대기PM_(2.5)중수용성리자적주요조분,삼자질량농도지화점총수용성리자(TWSI)질량농도적90%이상;SO_4~(2-)오염물주요수원거리전수적영향,NO_3~-화NH_4~+오염물주요수국지원적영향;SO_4~(2-)화NO_3~-적주야형성궤리불동,타문적형성과정주요수상대습도、온도화O_3농도적영향.주변지구생물질연소도치료제남중오염천기적산생,강수대오염물적청제작용교강.대비토양화해염중각충리자적질량농도비가지,제남추계PM_(2.5)중적K~+수생물질연소적영향교대,Cl~-주요래원우해염화생물질연소,Na~+주요래원우해염.
To understand the mass concentrations and diurnal variation of water-soluble ions in fine particles (PM_(2.5)), half-month observation from 29 September to 15 October 2008 was carried out using a fine particle online Ambient Ion Monitor in Jinan.Simultaneously, meteorological data and some precursor (SO_2, NO_x, O_3) contents data were also collected and analyzed.This study showed that coal burning pollution was a severe issue in Jinan.SO_4~(2-), NO_3~- and NH_4~+ were the dominant ions in fine particles, constituting more than 90% of total water-soluble ions.Mass concentration of SO_4~(2-) was influenced by long-distance transport of air pollutants (sulphur-containing substances), while NO_3~- and NH_4~+ were affected by local sources.The formation mechanism of SO_4~(2-) and NO_3~-, which was influenced by relative humidity, temperature and concentration of ozone, was different in day and night.In autumn, the high pollution weather of Jinan was also affected by biomass burning in the surrounding areas, and rainfall had significant clearing effects on air pollution.It was indicated that biomass burning influenced K~+ significantly.Through comparing the mass concentration ratios of various ions in the soil and in the sea salt, it was found that biomass burning was an important source of Cl~-, and sea salt was also the major source of Na~+ and Cl~- in fine particles in Jinan in autumn.