A three-year investigation of metals in the atmospheric wet deposition of a basin region, north China: Pollution characteristics and source apportionment
A three-year investigation of metals in the atmospheric wet deposition of a basin region, north China: Pollution characteristics and source apportionment
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DOI：
10.1016/j.apr.2020.01.007
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发表时间：
2020-04
影响因子：
4.5
通讯作者：
Xiao Tian;A. Ye;Qiusheng He;Zhen-Tao Wang;Li-li Guo;Lai-guo Chen;Ming Liu;Yuhang Wang
中科院分区：
文献类型：
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作者：
Xiao Tian;A. Ye;Qiusheng He;Zhen-Tao Wang;Li-li Guo;Lai-guo Chen;Ming Liu;Yuhang Wang
2013年1月- 2015年12月在中国太原市采集降水样本。采用电感耦合等离子体质谱法（ICP-MS）检测了13种元素。可溶性和不溶性物质的总浓度平均为9695.26 μg L−1。Si含量最高，占总量的94.61%，其次是Al和Fe。13种元素的湿沉降通量为3065.14 mg m−2·yr−1，夏季最大，春季最小。沉积通量顺序为Si > Al > Fe > Zn > Ba > Cu > Mn > Cr > Sr > Pb > Ni > as > Cd，元素以不溶性物质为主，占总量的56.1 ~ 98.5%。富集因子（EF）结果表明，Zn、Cu、Pb、As和Cd主要来源于人为活动，Al和Fe主要来源于地壳尘埃。2015年采用正矩阵分解法（PMF）鉴定了4个可溶性物质来源。结果表明，工业活动是主要污染源，占50.47%，其次是燃煤（26.09%）、机动车排放（13.59%）和扬尘（9.85%）。结合3年的反轨迹资料，东南气团（占39%）是太原降水的主要发源方向，对pH和通量有较大影响。
Precipitation samples were collected in Taiyuan, China, from January 2013 to December 2015. Thirteen elements were detected by inductively coupled plasma-mass spectrometry (ICP-MS). The total concentration of soluble and insoluble materials averaged 9695.26 μg L−1. Si was the most abundant element, accounting for 94.61% of the total, followed by Al and Fe. The wet deposition flux of the 13 elements was 3065.14 mg m−2·yr−1, with the highest flux detected in the summer and the lowest in the spring. The order of deposition flux was as follows: Si > Al > Fe > Zn > Ba > Cu > Mn > Cr > Sr > Pb > Ni > As > Cd. The elements mainly consisted of insoluble materials and accounted for 56.1–98.5% of the total. Per the enrichment factor (EF) results, Zn, Cu, Pb, As, and Cd were derived mainly from anthropogenic activities, while Al and Fe were derived mainly from crustal dusts. Positive Matrix Factorization (PMF) was used to identify 4 sources of soluble materials in 2015. Results revealed that industrial activities were the leading source, contributing to 50.47% of the total, followed by coal combustion (26.09%), vehicle emissions (13.59%), and dusts (9.85%). Combined with 3 years of back trajectory data, southeasterly air masses (with a proportion of 39%) were the main direction from which the precipitation in Taiyuan originated and had a considerable influence on pH and flux.