中国北京大气降尘中重金属的浓度和化学形态。
Concentrations and chemical forms of heavy metals in the bulk atmospheric deposition of Beijing, China.
机构信息
State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University, Beijing, 100875, China.
Ministry of Education Engineering Center of Desertification and Blown-sand Control, Beijing Normal University, Beijing, 100875, China.
出版信息
Environ Sci Pollut Res Int. 2017 Dec;24(35):27356-27365. doi: 10.1007/s11356-017-0324-4. Epub 2017 Oct 3.
This study aimed to investigate concentrations and mobility of selected metals (As, Cd, Cr, Co, Cu, Mn, Ni, Pb and Zn) contained in the bulk atmospheric deposition of Beijing, China, between March 2007 and February 2008, and to evaluate the metal deposition fluxes. Beijing endured heavy atmospheric deposited metal pollution with a deposition flux of 149.28 kg km year from nine metals studied, and a significant increasing trend was noted from metals studied during the past 23 years. High enrichment factors (EFs) of As, Zn, Pb, Cd, and Cu manifested their major anthropogenic sources. Among which, Cd and Pb require a consistent monitoring and to be strictly controlled regarding their high mobility and ecotoxicity. Furthermore, a declined metal concentration was observed in the bulk atmospheric deposition during spring, and long-transported crustal particles sourced from East Asian dust emission belt can reasonably account for this phenomenon.
本研究旨在调查 2007 年 3 月至 2008 年 2 月期间中国北京大气降尘中所含的选定金属（砷、镉、铬、钴、铜、锰、镍、铅和锌）的浓度和迁移性，并评估金属沉积通量。北京遭受了严重的大气金属污染，在所研究的九种金属中，沉积通量为 149.28kgkm 年，在过去 23 年中，所研究的金属呈显著上升趋势。砷、锌、铅、镉和铜的高富集因子（EF）表明它们主要来自人为源。其中，镉和铅的迁移性和生态毒性较高，需要持续监测并严格控制。此外，在春季，大气降尘中的金属浓度呈下降趋势，而来自东亚粉尘排放带的长距离搬运地壳颗粒可以合理地解释这一现象。
Zotero 插件