Water soluble components of PM10 Chongqing, China |
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摘 要: |
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关 键 词: | 水溶解离子 重庆 大气污染 硫氧化物 磷 颗粒尺寸 |
Water soluble components of PM10 in Chongqing,China |
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Authors: | Luo Qingquan Xian Xuefu Chen Gangcai Yang Qinglin |
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Affiliation: | (1) College of Resources and Environmental Science of Chongqing University, 400012 Chongqing, China;(2) Chongqing Academy of Environmental Sciences, 400020 Chongqing, China |
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Abstract: | The concentrations of water soluble ions (Na+, NH4
+, K+, Mg2+, Ca2+, NO3
-, Cl-, and SO
4
2-
) in PM10 samples collected on cellulose filters by a medium-volume cascade impactor were determined, which were obtained from three
kinds of areas in Chongqing: industrial area (Jiulongpo district), commercial and residential area (Jiangbei district) and
background area (Jinyun Mountain in the Beibei district). The results showed that except for the background site, the annual
average values of PM10 are 23% – 61% higher than the national air quality standard (GradeII) (0.1 mg/m3), even that the value of the control site is still 20% higher than American standard (0.05 mg/m3). This implied that serious pollution of fine particles occurred in Chongqing. Nine kinds of soluble ions in water of PM10 were analyzed by ion chromatography (IC) and the annual average concentrations follow the order of SO
4
2-
] > NO3
-] > Cl-] > F-], and Ca2+] > NH4
+] > K+] > Na+] > Mg2+]. Their values were different in these areas: the industrial area > the commercial and living area > the control area. As
for NH4
+, K+, Ca2+, NO3
- and SO
4
2-
, their seasonal average concentrations show a similar variation trend: the values in spring and fall were higher than those
in summer and winter. The seasonal average concentrations of Cl-], F-], Na+] and Mg2+] are much lower than those of other ions. However, the concentrations of Na+] changed more greatly in different seasons than those of the other three ions. Correlation coefficients showed that the three
areas have been polluted by coal smoke and dust to different extents, while some local resources of pollution should be taken
into consideration as well. |
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Keywords: | PM10 water soluble ion Chongqing |
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