庐山三级分档雾水化学特征的对比分析

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Abstract In order to investigate the physical and chemical properties of fog water in Mount Lushan, comprehensive observations were carried out during the wintertime of 2015 and 2016. A three-stage Caltech Active Strand Cloud Collector (CASCC) was used to collect the fog droplets within three size ranges (4~16μm, 16~22μm and >22μm), and in total 44 samples were obtained during the observations. Concentrations of cations and anions in each sample were also measured by using Ion Chromatography instrument. We then analyzed the correlation between the ions in each stage as well as the sources of these ions. The composition and the chemical characteristics of the fog water were also given. The results showed that the fog water in 2015 and 2016 was mostly acidic, while the pH value is lower in 2016. A correlation between the pH value and the droplet size was also found, showing a stronger acidity for smaller droplets. The major ions found in fog water were Ca²⁺, NH₄⁺, SO₄^2-, NO₃^- and Cl^-. NH₄⁺, SO₄^2-, NO₃^- mostly reside in small droplets, and they are strongly influenced by the human activities instead of the natural sources such as ocean and soil. It is interesting to find that Cl^- in 2015 was mainly affected by anthropogenic sources while in 2016 they were influenced by marine sources due to a significant reduction of the human inputs. Moreover, Mg²⁺ and Ca²⁺ were found mostly concentrated in large droplets. Due to the decrease of SO₂ and NO_x emission, the concentrations of SO₄^2- and NO₃^- in fog water in 2016 were found remarkably lower than those in 2015.

Key words： Mount Lushan three-stage fog water chemical properties

Received: 16 April 2019

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X517

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	Articles by authors
	ZHANG Hong-wei
	FAN Shu-xian
	HU Chun-yang
	ZHU Dan-dan
	KANG Bo-shi

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ZHANG Hong-wei,FAN Shu-xian,HU Chun-yang等. Comparative analysis of the chemical properties of the three-stage fog water in Mount Lushan[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(11): 4589-4598.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I11/4589

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