High Contributions of Secondary Inorganic Aerosols to PM(2.5) under Polluted Levels at a Regional Station in Northern China.
High Contributions of Secondary Inorganic Aerosols to PM(2.5) under Polluted Levels at a Regional Station in Northern China.
复制标题
华北某区域站污染水平下二次无机气溶胶对 PM2.5 的贡献较高
DOI：
10.3390/ijerph13121202
复制
发表时间：
2016-12-15
影响因子：
--
通讯作者：
Wu Y
中科院分区：
文献类型：
--
作者：
Li Y;Tao J;Zhang L;Jia X;Wu Y
2015年，北京-天津-河北地区的上甸子(SDZ)区域站点每天采集PM2.5样本。对样品进行了有机碳(OC)、元素碳(EC)和主要的水溶性无机离子的化学分析。PM2.5年平均质量浓度为53±36μg·m−3，春季最高，夏季最低。水溶性无机离子和碳质气溶胶年均分别占PM2.5质量的34%±15%和33%±9%。以PM2.5空气质量指数(AQI)为基准的优良、良好、轻度污染、中度污染和重度污染天数分别占全年的40%、42%、11%、4%和3%。硫酸盐、硝酸盐和铵的平均浓度总和从优良天数的4.2±2.9μg·m−3增加到重污染天数的85.9±2 2.4μg·m−3，对PM2.5的贡献率从15%±8%增加到49%±10%。碳质气溶胶的平均浓度从9.2±2.8μg·m−3增加到5 1.2±14.1μg·m−3，对PM2.5的贡献率从34%±6%下降到2 9%±7%。潜在源贡献函数(PSCF)分析表明，该区PM2.5及其主要化学成分的主要来源主要集中在山东、河南和河北三省。位于自贸区西侧的山西省和内蒙古自治区的区域污染物输送在采暖季节也很重要。
Daily PM2.5 samples were collected at Shangdianzi (SDZ) regional site in Beijing–Tianjin–Hebei (BTH) region in 2015. Samples were subject to chemical analysis for organic carbon (OC), elemental carbon (EC), and major water-soluble inorganic ions. The annual average PM2.5 mass concentration was 53 ± 36 μg·m−3 with the highest seasonal average concentration in spring and the lowest in summer. Water-soluble inorganic ions and carbonaceous aerosols accounted for 34% ± 15% and 33% ± 9%, respectively, of PM2.5 mass on annual average. The excellent, good, lightly polluted, moderately polluted, and heavily polluted days based on the Air Quality Index (AQI) of PM2.5 accounted for 40%, 42%, 11%, 4%, and 3%, respectively, of the year. The sum of the average concentration of sulfate, nitrate, and ammonium (SNA) increased from 4.2 ± 2.9 μg·m−3 during excellent days to 85.9 ± 22.4 μg·m−3 during heavily polluted days, and their contributions to PM2.5 increased from 15% ± 8% to 49% ± 10% accordingly. In contrast, the average concentration of carbonaceous aerosols increased from 9.2 ± 2.8 μg·m−3 to 51.2 ± 14.1 μg·m−3, and their contributions to PM2.5 decreased from 34% ± 6% to 29% ± 7%. Potential source contribution function (PSCF) analysis revealed that the major sources for high PM2.5 and its dominant chemical components were within the area mainly covering Shandong, Henan, and Hebei provinces. Regional pollutant transport from Shanxi province and Inner Mongolia autonomous region located in the west direction of SDZ was also important during the heating season.
登录
查看更多内容
影响因子：
10.4
作者：
van Donkelaar A;Martin RV;Brauer M;Kahn R;Levy R;Verduzco C;Villeneuve PJ
通讯作者：
Villeneuve PJ
影响因子：
9.8
作者：
Tao, Jun;Zhang, Leiming;Zhang, Yuanhang
通讯作者：
Zhang, Yuanhang
北京冬季相对湿度对气溶胶组成及演化过程的影响
影响因子：
5
作者：
Sun, Yele;Wang, Zifa;Ge, Xinlei
通讯作者：
Ge, Xinlei
影响因子：
5
作者：
Wang, Y;Zhuang, GS;Zheng, AH
通讯作者：
Zheng, AH
中国氮氧化物排放：历史趋势与未来展望
影响因子：
6.3
作者：
Zhao, B.;Wang, S. X.;Amann, M.
通讯作者：
Amann, M.