Distribution Characteristics and Seasonal Variations of Arsenic in Atmospheric Aerosols over the Yellow Sea and Bohai Sea

被引：2

作者：

Yuan S. ^{[1
,2
]}

Wang Y. ^{[1
,2
]}

Liu R.-H. ^{[1
,2
]}

Chong X.-X. ^{[1
,2
]}

Liu X.-Y. ^{[1
,2
]}

Shao L. ^{[1
,2
]}

机构：

[1] College of Environmental Science and Engineering, Ocean University of China, Qingdao

[2] Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao

来源：

Huanjing Kexue/Environmental Science | 2021年 / 42卷 / 09期

关键词：

Backward trajectory; Dry deposition flux; Seasonal variations; Total arsenic; Yellow Sea and Bohai Sea;

D O I：

10.13227/j.hjkx.202102106

中图分类号：

学科分类号：

摘要：

Marine aerosol samples of total suspended particulates (TSP) were collected in winter (2017) and spring and summer (2018) over the Yellow Sea and Bohai Sea. These samples were analyzed for total arsenic (As), As(Ⅴ) and As(Ⅲ), and water soluble ions to investigate the distribution and seasonal variation of As in atmospheric aerosols, as well as the dry deposition flux. Results showed that As concentrations in winter, spring, and summer were 6.6, 5.5, and 4.4 ng•m-3, respectively. The highest As concentrations occurred in the winter. Obvious differences in the spatial distribution of As were observed in different seasons. The highest concentrations of As were observed over the Bohai Sea in winter and the northern Yellow Sea in spring, with an average of 8.8 and 11.3 ng•m-3, respectively. As concentrations exhibited a relatively uniform spatial pattern in summer over the Yellow Sea and Bohai Sea, which may have been affected by the different sources of As. As(Ⅴ) was the main species of As, while As(Ⅴ)/As(Ⅲ) ratios were 0.41 in winter and 0.21 in summer, respectively. Average As/TSP ratios in the winter, spring, and autumn were 95.4, 83.9, and 81.4 μg•g-1, respectively. Obviously higher As/TSP ratios, indicating higher intensity, occurred in winter. Air masses carry pollutants released over the Bohai Rim Region by the winter monsoon, resulting in higher As concentrations in winter. In summer, As concentrations are also higher, because air masses bring pollutants to the southeast coastal economic zone via the northeast monsoon. In spring, most air masses arriving in this region originate from Siberia and the southeast ocean with high rate, resulting in lower As concentrations. The significant correlation between K+/TSP and As/TSP (r=0.78, P< 0.05) in winter indicates that As is affected by the combustion of land biomass. No significant correlation in summer reveals the difference in As sources between winter and summer. The dry deposition flux of As over the Yellow Sea and Bohai Sea was 1.15 μg•(m2•d)-1 in winter, 0.77 μg•(m2•d)-1 in spring, and 0.97 μg•(m2•d)-1 in summer, with an annual mean value of 0.95 μg•(m2•d)-1. © 2021, Science Press. All right reserved.

引用

页码：4151 / 4157

页数：6

共 28 条

[1] Wang S L, Mulligan C N., Occurrence of arsenic contamination in Canada: sources, behavior and distribution, Science of the Total Environment, 366, 2-3, pp. 701-721, (2006)
[2] Hedberg E, Gidhagen L, Johansson C., Source contributions to PM<sub>10</sub> and arsenic concentrations in central Chile using positive matrix factorization, Atmospheric Environment, 39, 3, pp. 549-561, (2005)
[3] Yoshikawa M, Aoki K, Ebine N, Et al., Correlation between the arsenic concentrations in the air and the SMR of lung cancer, Environmental Health and Preventive Medicine, 13, 4, pp. 207-218, (2008)
[4] Zhang L, Gao Y, Wu S L, Et al., Global impact of atmospheric arsenic on health risk: 2005 to 2015, Proceedings of the National Academy of Sciences of the United States of America, 117, 25, pp. 13975-13982, (2020)
[5] Yang G S, Ma L L, Xu D D, Et al., Levels and speciation of arsenic in the atmosphere in Beijing, China, Chemosphere, 87, 8, pp. 845-850, (2012)
[6] Tsai Y I, Kuo S C, Lin Y H., Temporal characteristics of inhalable mercury and arsenic aerosols in the urban atmosphere in southern Taiwan, Atmospheric Environment, 37, 24, pp. 3401-3411, (2003)
[7] Li Z P, Li Q, Shi J H, Et al., Concentration, solubility, and dry deposition flux of trace elements in fine and coarse particles in Qingdao during summer, Environmental Science, 39, 7, pp. 3067-3074, (2018)
[8] Liang X X, Tian C G, Zong Z, Et al., Flux and source-sink relationship of heavy metals and arsenic in the Bohai Sea, China, Environmental Pollution, 242, pp. 1353-1361, (2018)
[9] Xie J J, Yuan C G, Xie J, Et al., Fraction distribution of arsenic in different-sized atmospheric particulate matters, Environmental Science and Pollution Research, 26, 30, pp. 30826-30835, (2019)
[10] Draxler R R, Hess G D., An overview of the HYSPLIT_4 modelling system for trajectories, dispersion and deposition, Australian Meteorological Magazine, 47, 4, pp. 295-308, (1998)

← 1 2 3 →