Wen Bin, Yin Yan, Qing Yan-shuo, Chen Kui
Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science Technology, Nanjing 210044, China.
Huan Jing Ke Xue. 2013 May;34(5):1973-81.
Aerosol was collected with Anderson cascade sampler at three altitudes of the Mount Huang in the summer 2011. Samples were analyzed by the ion chromatography (IC, Metrohm). The results showed that the mean mass concentrations of all the ions were 13.21 microg x m(-1), 10.94 microg x m(-3), 9.97 microg x m(-3), at the foot, mid height and the summit of the mountain, respectively. The mass concentration of water-soluble components of aerosol decreased with altitude. The major anion and cation of aerosols were SO4(2-) and NH4+, respectively. The descending order of mass concentration of major ionic species was: SO4(2-) > NH4+ > Ca2+ > NO3- and NH4+ account for about 75% of total ionic concentrations of PM2.1 in three sampling sites. The concentration of SO4(2-) and NH4+ decreased conspicuously with altitude. The major cation and anion of coarse mode particles were Ca2+ and NO3-, respectively. The slope of the linear regression line between anion and cation of PM10 and PM2.1 approximates 1, indicating acid-base balance in aerosol particles. Aerosols over the region Mount Huang were influenced by anthropogenic source of surrounding areas to a certain extent. The result also suggested that the correlation between NH4+ and SO4(2-) was 0. 98 and these ions predominantly existed in the form of (NH4)2SO4 and NH4HSO4. Backward trajectory analysis revealed that the air mass was originated from southern coastal regions, the East China Sea, the Yellow Sea and the northern China. Due to the northern air masses go through heavily polluted areas, concentrations of water-soluble ions in these air masses were higher than that of other air masses. The concentration of K+ in northern air mass was several times higher than that in southwestern air mass.
2011年夏季，利用安德森级联采样器在黄山的三个海拔高度采集气溶胶样本。样本采用离子色谱法（IC，万通公司）进行分析。结果表明，所有离子的平均质量浓度在山脚、半山腰和山顶分别为13.21μg·m⁻³、10.94μg·m⁻³、9.97μg·m⁻³。气溶胶中水溶性成分的质量浓度随海拔升高而降低。气溶胶的主要阴离子和阳离子分别为SO₄²⁻和NH₄⁺。主要离子种类的质量浓度降序排列为：SO₄²⁻＞NH₄⁺＞Ca²⁺＞NO₃⁻，且在三个采样点NH₄⁺约占PM₂.₁总离子浓度的75%。SO₄²⁻和NH₄⁺的浓度随海拔显著降低。粗模式颗粒的主要阳离子和阴离子分别为Ca²⁺和NO₃⁻。PM₁₀和PM₂.₁的阴离子与阳离子之间的线性回归线斜率接近1，表明气溶胶颗粒中的酸碱平衡。黄山地区的气溶胶在一定程度上受到周边地区人为源的影响。结果还表明，NH₄⁺与SO₄²⁻的相关性为0.98，这些离子主要以(NH₄)₂SO₄和NH₄HSO₄的形式存在。后向轨迹分析表明，气团起源于南部沿海地区、东海、黄海和中国北方。由于北方气团经过污染严重的地区，这些气团中水溶性离子的浓度高于其他气团。北方气团中K⁺的浓度比西南气团中的高出几倍。
