The effects of haze on dew quality in the urbanecosystem of Changchun, Jilin Province, China
The effects of haze on dew quality in the urbanecosystem of Changchun, Jilin Province, China
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雾霾对吉林省长春市城市生态系统露水质量的影响
DOI：
10.1007/s10661-016-5131-8
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发表时间：
2016
影响因子：
3
通讯作者：
Tang Jie
中科院分区：
文献类型：
--
作者：
Xu Yingying;Zhu Hui;Tang Jie
2013 - 2015年在吉林省长春市采集了正常天气和灰霾天气（灰霾天）下的露水样品，研究了露水的化学特征。分析包括测量以下参数：pH值、电导率（EC）、总溶解固体（TDS）、PM2.5、PM10、主要阳离子（NH 4+、Na+、K+、Ca 2+和Mg 2+）和主要阴离子（F−、Cl−、SO 42 −和NO3−）的浓度。结果表明，雾霾天露水水质明显低于正常天气，平均pH值（5.75）低于正常天气（6.56），即在稳定大气条件下，露水酸性更强。雾天露水的EC（542.71 μs/cm）和TDS（271.36 mg/L）均高于正常天气。<2.5 μ m和2.5 ~ 10 μm的颗粒物（PM2.5和PM10）的平均浓度在正常日分别为21.69和51.56 mg/L，在灰霾日分别高出2.48和1.79倍以上，也就是说，在灰霾日，露水能去除更多的细颗粒物。灰霾日水溶性离子浓度比正常日高3.01-9.32倍。在灰霾天，次生物质和K+浓度远高于其他离子浓度。结果表明，露水主要去除汽车尾气和工业废气中的气溶胶，而对一些水溶性地壳离子的去除作用较小。
Dew samples were collected during both normal weather and haze events (hazy days) to investigate the chemical characteristics of dew in Changchun, Jilin, China, from 2013 to 2015. The analysis included measures of the following parameters: pH, electrical conductivity (EC), total dissolved solid (TDS), and the concentration of PM2.5, PM10, major cations (NH4+, Na+, K+, Ca2+, and Mg2+), and major anions (F−, Cl−, SO42−, and NO3−). The results demonstrated that dew water quality from hazy days was much lower quality than that on normal days with a lower mean pH during hazy days (5.75) when compared with that of normal days (6.56); that is, dew water was more acidic in stable atmospheric conditions. Both EC (542.71 μs/cm) and TDS (271.36 mg/L) of dew on hazy days were higher than that on normal days. The mean concentration of particulate matter <2.5 and 2.5–10 μm in diameter (PM2.5and PM10, respectively) was 21.69 and 51.56 mg/L on normal days and were over 2.48 and 1.79 times higher on hazy days, respectively; that is, dew removed more fine particles on hazy days. On hazy days, the concentrations of water-soluble ions were 3.01–9.32 times higher than levels on normal days. The concentrations of secondary species and K+on hazy days were much higher than those of other ions. The results indicated dew mainly removed aerosols from automobile exhaust, and industrial waste gas emissions, while to a lesser extent dew did scavenge some water-soluble crustal ions.