Journal
CHEMOSPHERE
Volume 174, Issue -, Pages 428-436Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2017.02.004
Keywords
Trace elements; Atmospheric wet deposition; Deposition fluxes; Source identification; Ecological effects; Jiaozhou Bay
Categories
Funding
- National Program on Key Basic Research Project of China(973 Program) [2015CB452901, 2015CB452902]
- Qingdao National Laboratory for Marine Science and Technology [2015ASTPOS13]
- National Natural Science Foundation,Shandong Province for Marine Science Research Centers [U1406403]
- National Natural Science Foundation of China [41306070]
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To analyze the fluxes, seasonal variations, sources and potential ecological effects of dissolved trace elements (TEs) in atmospheric wet deposition (AWD), one-year wet precipitation samples were collected and determined for nine TEs in Jiaozhou Bay (JZB) between June 2015 and May 2016. Both the volume weighted mean (VWM) concentration and flux sequence for the measured TEs was Al > Mn > Zn > Fe > Pb > Se > Cr > Cd > Co. Al was the most abundant TE with a VWM concentration and wet flux of 33.8 mu g L-1 and 29.2 mg m(-2) yr(-1), which were 2 and 3 orders of magnitude higher than those of Co, respectively. The emission intensities of pollutants, rainfall amount and wind speed were the dominating factors influencing seasonal variations of TEs in AWD. Based on enrichment factors, correlation analysis and principal component analysis, most of the TEs in AWD were primarily originated from anthropogenic activities except for Al and Fe, which are typically derived from re -suspended soil dusts. Although the TE inputs by AWD were significantly lower than those by rivers, the TE inputs via shortterm heavy rains would distinctly increase surface seawater TE concentrations and then pollute the marine environment of JZB. AWD would have both profound impacts on the biogeochemical cycles of TEs and dual ecological effects (nutrient and toxicity) on aquatic organisms. (C) 2017 Elsevier Ltd. All rights reserved.
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