Li Qian, Shi Jin-Hui, Li Peng-Zhi, Yao Xiao-Hong, Gao Hui-Wang
College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China.
Key Laboratory of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China.
Huan Jing Ke Xue. 2018 Apr 8;39(4):1520-1526. doi: 10.13227/j.hjkx.201708034.
Thirty-five atmospheric precipitation samples were collected at an urban site in Qingdao from June 2016 to May 2017. The total and soluble concentrations of eight trace elements in the samples were determined, and the variable characteristics of the concentrations and solubility of trace elements, as well as the factors affecting the solubility of trace elements in atmospheric precipitation, have been discussed. Based on the overall data, the total concentrations of the trace elements were found to be in the order Al > Fe > Zn > Mn > Ba > Pb > Sr > V, but the soluble concentrations of the trace elements were in the order Zn > Al > Mn > Fe > Ba > Sr > Pb > V. Solubility was about 5% for the crustal elements Al and Fe, and the solubility of the elements affected by anthropogenic sources was relatively higher, 10%-40% for Pb and Ba, 20%-60% for Mn and Sr, and nearly 55% for Zn and V. The total and soluble concentrations of the trace elements were higher in winter and spring than in summer and autumn, but element solubility in spring was the highest. During continuous rainfall, the total concentrations of trace elements in precipitation decreased appreciably, but the variation trend of the solubility of trace elements was not consistent during the different rainfall processes. The variation in pH was the main factor controlling the solubility of trace elements in precipitation.
2016年6月至2017年5月期间，在青岛的一个城市站点采集了35个大气降水样本。测定了样本中8种微量元素的总量和可溶性浓度，并讨论了微量元素浓度和溶解度的变化特征，以及影响大气降水中微量元素溶解度的因素。根据总体数据，发现微量元素的总浓度顺序为Al>Fe>Zn>Mn>Ba>Pb>Sr>V，但微量元素的可溶性浓度顺序为Zn>Al>Mn>Fe>Ba>Sr>Pb>V。地壳元素Al和Fe的溶解度约为5%，受人为来源影响的元素溶解度相对较高，Pb和Ba为10%-40%，Mn和Sr为20%-60%，Zn和V近55%。微量元素的总量和可溶性浓度在冬季和春季高于夏季和秋季，但春季元素溶解度最高。在连续降雨期间，降水中微量元素的总浓度明显下降，但在不同降雨过程中微量元素溶解度的变化趋势不一致。pH值的变化是控制降水中微量元素溶解度的主要因素。
