| 青岛大气降水中微量元素的浓度及溶解度 |
| 摘要点击 2176 全文点击 641 投稿时间：2017-08-04 修订日期：2017-09-12 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 大气降水 微量元素 溶解度 pH 青岛 气溶胶 |
| 英文关键词 atmospheric precipitation trace elements solubility pH Qingdao aerosol |
|
| 中文摘要 |
| 利用2016年6月~2017年5月在青岛采集的35个降水样品，分析其中8种微量元素的总态和溶解态浓度，讨论了大气降水中微量元素的浓度及其溶解度的变化特征，并探讨了影响大气降水中微量元素溶解度的因素.结果表明，青岛降水中微量元素的总态浓度以Al和Fe的最高，其次是Zn、Mn、Ba、Pb、Sr、V的较低；溶解态浓度以Zn的最高，其次是Al、Mn、Fe、Ba、Sr、Pb和V的较低；溶解度以地壳元素Al和Fe的最低，为5%左右，受到人为源影响的元素溶解度相对较高，Pb和Ba的为10%~40%，Mn和Sr的为20%~60%，Zn和V溶解度最高，平均约为55%.季节变化显示不同元素总态和溶解态浓度基本呈现冬、春季明显高于夏、秋季，溶解度基本表现为春季最高.持续降雨的前后期微量元素的总态和溶解态浓度均呈现明显降低，但溶解度的变化趋势在不同降雨过程中不一致，pH变化是控制降水中微量元素溶解度的主要因子. |
| 英文摘要 |
| 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. |
|
|
|
