Gas-phase ammonia and PM2.5 ammonium in a busy traffic area of Nanjing, China
Gas-phase ammonia and PM2.5 ammonium in a busy traffic area of Nanjing, China
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DOI：
10.1007/s11356-015-5397-3
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发表时间：
2015
影响因子：
5.8
通讯作者：
Wenxin Wang;Shanshan Wang;Jianhua Xu;Rui Zhou;Chanzhen Shi;Bin Zhou
中科院分区：
文献类型：
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作者：
Wenxin Wang;Shanshan Wang;Jianhua Xu;Rui Zhou;Chanzhen Shi;Bin Zhou
于2013年7月至2014年8月在中国南京的忙碌繁忙交通区监测了气相氨（NH）和细颗粒PM铵（pNH）（统称为NHx）。结果表明，大气中PM浓度为66.7 μg/m，NH浓度为6.66 μg/m. PM中pNH为3.04 μg·m-1，SO（pSO）为10.16 μg·m-1，NO（pNO）为1.60 μg·m-1. PM测试的显著相关曲线表明，pNH和pSO的摩尔比约为2，这可能是（NH）SO。颗粒NH主要与pSO，占总PM质量的4.54%。PM观察到酸性，大气中的NH中和了酸性物质，主要是硫酸盐形式。该地区的交通强度与PM和NH的形成部分相关，表明交通污染可能是PM的重要来源。NHx和酸性物质之间的反应被假定为次级PM。讨论了NHx的中和和光化学性质。
The gas-phase ammonia (NH) and fine particle PM ammonium (pNH)(collectively, NHx) were monitored between July 2013 and August 2014 in a busy traffic area of Nanjing, China. Results showed that PM concentration was 66.7 μg m, and NH concentration was 6.66 μg m. In the PM, the concentration of pNH was 3.04 μg m, SO (pSO) was 10.16 μg m, and NO (pNO) was 1.60 μg m. The significant correlation curves from the tests of PM revealed that molar ratio of pNH and pSO was approximately 2, which could be (NH) SO. Particulate NH primarily associated with pSO, which accounted for 4.54% of total PM mass. The PM observed acidic and the NH in the atmosphere neutralized acidic species, mainly in a sulfate form. The traffic intensity in the region was partially related to the formation of PM and NH, suggesting that traffic pollution may be an important source of PM. The reaction between NHx and acidic species was assumed to the secondary PM. The neutralization and photochemical property of NHx were discussed.