کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6328484 | 1619772 | 2015 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The use of Pb, Sr, and Hg isotopes in Great Lakes precipitation as a tool for pollution source attribution
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کلمات کلیدی
Particle bound mercuryGEMmvTHYSPLITSRMPMFNISTMDFMC-ICP-MSPBMStable isotopes - ایزوتوپهای پایدارGoM - بلهPositive matrix factorization - تقسیم بندی ماتریس مثبتMass-independent fractionation - تقسیم بندی مستقل مستقل توده ایGaseous oxidized mercury - جیوه اکسید شده گازیGaseous elemental mercury - جیوه عنصری گازWet deposition - رسوب مرطوبMIF - شهرmulti-collector inductively coupled plasma mass spectrometry - طیف سنجی جرم پلاسما به صورت القایی با چند جمع جمع آوری شده استHeavy metals - فلزات سنگینstandard reference material - مرجع استانداردSource attribution - منبع منبعNational Institute of Standards and Technology - موسسه ی ملی استانداردها و تکنولوژیMississippi Valley-type - نوع دره میسیسیپیMass-dependent fractionation - کسری سازی وابسته به توده
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The anthropogenic emission and subsequent deposition of heavy metals including mercury (Hg) and lead (Pb) present human health and environmental concerns. Although it is known that local and regional sources of these metals contribute to deposition in the Great Lakes region, it is difficult to trace emissions from point sources to impacted sites. Recent studies suggest that metal isotope ratios may be useful for distinguishing between and tracing source emissions. We measured Pb, strontium (Sr), and Hg isotope ratios in daily precipitation samples that were collected at seven sites across the Great Lakes region between 2003 and 2007. Lead isotope ratios (207Pb/206Pb = 0.8062 to 0.8554) suggest that Pb deposition was influenced by coal combustion and processing of Mississippi Valley-Type Pb ore deposits. Regional differences in Sr isotope ratios (87Sr/86Sr = 0.70859 to 0.71155) are likely related to coal fly ash and soil dust. Mercury isotope ratios (δ202Hg = â 1.13 to 0.13â°) also varied among the sites, likely due to regional differences in coal isotopic composition, and fractionation occurring within industrial facilities and in the atmosphere. These data represent the first combined characterization of Pb, Sr, and Hg isotope ratios in precipitation collected across the Great Lakes region. We demonstrate the utility of multiple metal isotope ratios in parallel with traditional trace element multivariate statistical modeling to enable more complete pollution source attribution.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volume 502, 1 January 2015, Pages 362-374
Journal: Science of The Total Environment - Volume 502, 1 January 2015, Pages 362-374
نویسندگان
Laura S. Sherman, Joel D. Blum, J. Timothy Dvonch, Lynne E. Gratz, Matthew S. Landis,