Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-4251-2017 |
Atmospheric trace metals measured at a regional background site (Welgegund) in South Africa | |
Venter, Andrew D.1; van Zyl, Pieter G.1; Beukes, Johan P.1; Josipovic, Micky1; Hendriks, Johan1; Vakkari, Ville2; Laakso, Lauri1,2 | |
2017-03-29 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:6 |
文章类型 | Article |
语种 | 英语 |
国家 | South Africa; Finland |
英文摘要 | Atmospheric trace metals can cause a variety of health-related and environmental problems. Only a few studies on atmospheric trace metal concentrations have been conducted in South Africa. Therefore the aim of this study was to determine trace metal concentrations in aerosols collected at a regional background site, i.e. Welgegund, South Africa. PM1, PM1-2.5 and PM2 .5-10 samples were collected for 13 months, and 31 atmospheric trace metal species were detected. Atmospheric iron (Fe) had the highest concentrations in all three size fractions, while calcium (Ca) was the second-most-abundant species. Chromium (Cr) and sodium (Na) concentrations were the third-and fourth-mostabundant species, respectively. The concentrations of the trace metal species in all three size ranges were similar, with the exception of Fe, which had higher concentrations in the PM1 size fraction. With the exception of titanium (Ti), aluminium (Al) and manganese (Mg), 70% or more of the trace metal species detected were in the smaller size fractions, which indicated the influence of industrial activities. However, the large influence of wind-blown dust was reflected by 30% or more of trace metals being present in the PM2.5-10 size fraction. Comparison of trace metals determined atWelgegund to those in the western Bushveld Igneous Complex indicated that at both locations similar species were observed, with Fe being the most abundant. However, concentrations of these trace metal species were significantly higher in the western Bushveld Igneous Complex. Fe concentrations at the Vaal Triangle were similar to levels thereof at Welgegund, while concentrations of species associated with pyrometallurgical smelting were lower. Annual average Ni was 4 times higher, and annual average As was marginally higher than their respective European standard values, which could be attributed to regional influence of pyrometallurgical industries in the western Bushveld Igneous Complex. All three size fractions indicated elevated trace metal concentrations coinciding with the end of the dry season, which could partially be attributed to decreased wet removal and increases in wind generation of particulates. Principal component factor analysis (PCFA) revealed four meaningful factors in the PM1 size fraction, i. e. crustal, pyrometallurgical-related and Au slimes dams. No meaningful factors were determined for the PM1-2 .(5) and PM2.5-10 size fractions, which was attributed to the large influence of wind-blown dust on atmospheric trace metals determined at Welgegund. Pollution roses confirmed the influence of wind-blown dust on trace metal concentrations measured at Welgegund, while the impact of industrial activities was also substantiated. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000397939000004 |
WOS关键词 | ELEMENTAL COMPOSITION ; ORGANIC-COMPOUNDS ; AEROSOLS ; URBAN ; GRASSLAND ; MERCURY ; COMPLEX ; INDOOR |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/25000 |
专题 | 地球科学 |
作者单位 | 1.North West Univ, Unit Environm Sci & Management, Potchefstroom, South Africa; 2.Finnish Meteorol Inst, Helsinki, Finland |
推荐引用方式 GB/T 7714 | Venter, Andrew D.,van Zyl, Pieter G.,Beukes, Johan P.,et al. Atmospheric trace metals measured at a regional background site (Welgegund) in South Africa[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(6). |
APA | Venter, Andrew D..,van Zyl, Pieter G..,Beukes, Johan P..,Josipovic, Micky.,Hendriks, Johan.,...&Laakso, Lauri.(2017).Atmospheric trace metals measured at a regional background site (Welgegund) in South Africa.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(6). |
MLA | Venter, Andrew D.,et al."Atmospheric trace metals measured at a regional background site (Welgegund) in South Africa".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.6(2017). |
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