DOI: 10.1016/j.atmosenv.2017.04.024
Scopus记录号: 2-s2.0-85018978349
论文题名: Applying geochemical signatures of atmospheric dust to distinguish current mine emissions from legacy sources
作者: Dong C ; , Taylor M ; P
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 161 起始页码: 82
结束页码: 89
语种: 英语
英文关键词: Bioaccessibility
; Broken Hill
; Legacy emissions
; Natural weathering
; Pb isotopes
; SEM/EDS
Scopus关键词: Dust
; Isotopes
; Lead
; Mine dust
; Minerals
; Ore deposits
; Tailings
; Weathering
; Bioaccessibility
; Broken Hills
; Natural weathering
; Pb isotopes
; SEM/EDS
; Lead deposits
; lead
; lead 206
; lead 207
; lead sulfide
; manganese
; sulfur
; unclassified drug
; blood
; concentration (composition)
; dust
; emission
; gossan
; human activity
; isotopic composition
; lead isotope
; mining industry
; ore body
; pollutant source
; soil property
; weathering profile
; Article
; atmosphere
; chemical composition
; chemical structure
; concentration (parameters)
; dust
; geochemical analysis
; mine tailings
; mineralogy
; mining
; priority journal
; soil
; weathering
; Australia
; Broken Hill
; New South Wales
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Resolving the source of environmental contamination is the critical first step in remediation and exposure prevention. Australia's oldest silver-zinc-lead mine at Broken Hill (>130 years old) has generated a legacy of contamination and is associated with persistent elevated childhood blood lead (Pb) levels. However, the source of environmental Pb remains in dispute: current mine emissions; remobilized mine-legacy lead in soils and dusts; and natural lead from geological weathering of the gossan ore body. Multiple lines of evidence used to resolve this conundrum at Broken Hill include spatial and temporal variations in dust Pb concentrations and bioaccessibility, Pb isotopic compositions, particle morphology and mineralogy. Total dust Pb loading (mean 255 μg/m2/day) and its bioaccessibility (mean 75% of total Pb) is greatest adjacent to the active mining operations. Unweathered galena (PbS) found in contemporary dust deposits contrast markedly to Pb-bearing particles from mine-tailings and weathered gossan samples. Contemporary dust particles were more angular, had higher sulfur content and had little or no iron and manganese. Dust adjacent to the mine has Pb isotopic compositions (208Pb/207Pb: 2.3197; 206Pb/207Pb: 1.0406) that are a close match (99%) to the ore body with values slightly lower (94%) at the edge of the city. The weight of evidence supports the conclusion that contemporary dust Pb contamination in Broken Hill is sourced primarily from current mining activities and not from weathering or legacy sources. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82762
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Environmental Sciences, Faculty of Science and Engineering, Macquarie University, North Ryde, Sydney, NSW, Australia; Energy and Environmental Contaminants Research Centre, Macquarie University, North Ryde, Sydney, NSW, Australia
Recommended Citation:
Dong C,, Taylor M,P. Applying geochemical signatures of atmospheric dust to distinguish current mine emissions from legacy sources[J]. Atmospheric Environment,2017-01-01,161