Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, China.
Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, China.
Chemosphere. 2020 Jul;251:126328. doi: 10.1016/j.chemosphere.2020.126328. Epub 2020 Feb 27.
A total of 60 snow samples from 16 sites across northeastern China were collected from December 2017 to March 2018. The snow samples were analyzed for pH value, major water-soluble ions (Cl, NO, SO, Na, NH, K, Ca, and Mg), and trace elements (Mn, Cr, Cd, Ni, Cu, Zn, Pb, As, and Fe). The results indicated that snow was slightly alkaline (mean pH value 7.54); Ca and SO were the major ions, contributing up to 33.87% and 22.72% of the major ions, respectively; Pb was the dominant element, contributing up to 62.84% of the trace elements. Both the concentration of major ions and trace elements peaked in the middle or later period of the entire snow season. Enrichment factor (EF) analysis indicated that ions (NO, NH, and Ca) and trace elements (Pb, As, Cu, and Zn) were severely enriched by anthropogenic activities. Compared with previous studies, which sampled snow from the high altitude and latitude regions, the concentrations of most of the ions and trace elements in this study were found to be 1-3 and 1-4 orders of magnitude higher, respectively, indicating a threat to human health.
从 2017 年 12 月至 2018 年 3 月，在中国东北地区的 16 个地点共采集了 60 个雪样。分析了这些雪样的 pH 值、主要水溶性离子（Cl、NO、SO、Na、NH、K、Ca 和 Mg）和微量元素（Mn、Cr、Cd、Ni、Cu、Zn、Pb、As 和 Fe）。结果表明，雪呈弱碱性（平均 pH 值为 7.54）；Ca 和 SO 是主要离子，分别占主要离子的 33.87%和 22.72%；Pb 是主要元素，占微量元素的 62.84%。主要离子和微量元素的浓度在整个雪季的中期或后期达到峰值。富集因子（EF）分析表明，离子（NO、NH 和 Ca）和微量元素（Pb、As、Cu 和 Zn）受到人为活动的严重富集。与之前在高海拔和高纬度地区采集雪样的研究相比，本研究中大多数离子和微量元素的浓度分别高出 1-3 和 1-4 个数量级，这表明对人类健康构成了威胁。
