广州干湿季典型灰霾过程水溶性离子成分对比分析

发布时间：2018-05-22 18:08

本文选题：湿季 + 干季　；参考：《环境科学学报》2017年01期

【摘要】：利用广州气象台2011年地面逐时能见度和相对湿度数据,以及广州番禺南村大气成分站2011年逐时Marga数据、PM数据,对比分析了一次湿季(4—9月)灰霾过程和干季(10月—次年3月)灰霾过程的污染特征.研究表明,相对干季灰霾过程,湿季灰霾过程颗粒物浓度较低,且细粒子所占比例较高;由于湿季较干季光化学反应较为活跃及可能受气象因素的不同影响,导致干湿季灰霾过程颗粒物浓度的总体变化趋势相反;湿季灰霾过程二次无机离子(SO_4~(2-)、NH_4~+和NO_3~-)占PM_(2.5)质量百分比的76%,是PM_(2.5)的主要成分;干季灰霾过程二次无机离子(SO_4~(2-)、NH_4~+和NO_3~-)仅占PM_(2.5)质量百分比的34%;湿季硫氧化率(Sulfur Oxidation Ratio,SOR)、氮氧化率(Nitrogen Oxidation Ratio,NOR)值大于干季,说明二次离子对湿季灰霾的贡献比干季要大;湿季灰霾过程中气溶胶酸性比干季弱.根据相关性分析结果可知,湿季灰霾过程中,NH_4~+主要与SO_4~(2-)结合,Na+主要与Cl-及NO_3~-结合,K+主要与Cl-和NO_3~-结合,极少部分与SO_4~(2-)结合;而在干季灰霾过程中,NH_4~+除了与SO_4~(2-)结合之外,还以NH_4NO_3和NH_4Cl的形式存在,K~+主要与Cl~-和SO_4~(2-)结合,Na+主要与Cl~-及SO_4~(2-)结合.
[Abstract]:The hourly visibility and relative humidity data of Guangzhou Meteorological Station in 2011 and the hourly Marga data of Guangzhou Panyu Village Atmospheric composition Station in 2011 are used. The pollution characteristics of haze process in the first wet season (April to September) and in the dry season (from October to March) were compared and analyzed. The results show that the concentration of particulate matter is lower and the proportion of fine particles is higher in the wet season than in the dry season, because the photochemical reaction is more active in the wet season than in the dry season and may be affected by different meteorological factors. The total change trend of particulate matter concentration in the process of haze in dry and wet seasons is opposite, and the main component of PMSP 2.5 is the 76% of the mass percent of the secondary inorganic ion so _ 4 ~ and no _ 3 ~ -) in the process of haze in the dry and wet season, and the percentage of NH _ 4 ~ and no _ 3 ~ (-) in PMN _ (2.5) in the process of haze and haze in the dry and wet seasons. The secondary inorganic ions in the dry season haze process only account for 34% of the mass of PMSP, and the oxidation rate of sulfur in wet season is higher than that in dry season, which indicates that the contribution of the second ion to the smog in wet season is higher than that in dry season, and the oxidation rate of sulfur in wet season is higher than that in dry season, which indicates that the contribution of the second ion to the haze in wet season is higher than that in dry season, and the ratio of nitrogen oxidation is higher than that in dry season. The ratio of nitrogen oxidation is higher than that of dry season, indicating that the contribution of the second ion to wet season haze is higher than that of dry season. The acidity of aerosol in wet season haze is weaker than that in dry season. According to the results of correlation analysis, during the wet season haze process, NH _ 4s ~ is mainly combined with so _ 4 / C _ 2) Na and Na are mainly combined with Cl- and no _ 3s / K, and few with so _ 4 / T _ 2), while in dry season haze, NH _ 4 ~ is combined with so _ (4) ~ (2), while in dry season haze, NH _ 4 ~ is combined with so _ (4) ~ (2). In the form of NH_4NO_3 and NH_4Cl, K ~ is mainly bound with ClC- and SO4C4C ~ (2) and Na is mainly bound with ClC- and SO4- (2).
【作者单位】：暨南大学大气环境安全与污染控制研究所;广东省大气污染在线源解析系统工程技术研究中心;中山大学大气科学学院;中国气象局广州热带海洋气象研究所;
【基金】：国家自然科学基金(No.41475004)~~
【分类号】：X513

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