FigsharePub Date : 2016-02-29DOI: 10.1021/es0626943.s001
Laurel A. Schaider (2489815), David B. Senn (2142055), Daniel J. Brabander (2489809), Kathleen D. McCarthy (2489812), James P. Shine (2315563)
{"title":"Characterization of Zinc, Lead, andnCadmium in Mine Waste: nImplications for Transport, Exposure,nand Bioavailability","authors":"Laurel A. Schaider (2489815), David B. Senn (2142055), Daniel J. Brabander (2489809), Kathleen D. McCarthy (2489812), James P. Shine (2315563)","doi":"10.1021/es0626943.s001","DOIUrl":"https://doi.org/10.1021/es0626943.s001","url":null,"abstract":"We characterized the lability and bioaccessibility of Zn,nPb, and Cd in size-fractionated mine waste at the Tar CreeknSuperfund Site (Oklahoma) to assess the potential fornmetal transport, exposure, and subsequent bioavailability.nBulk mine waste samples contained elevated Zn (9100n± 2500 ppm), Pb (650 ± 360 ppm), and Cd (42 ± 10 ppm),nwhile particles with the greatest potential for wind-borne transport and inhalation (<10 μm) containednsubstantially higher concentrations, up to 220 000 ppm Zn,n16 000 ppm Pb, and 530 ppm Cd in particles <1 μm.nAlthough the mined ore at Tar Creek primarily consistednof refractory metal sulfides with low bioavailability, sequentialnextractions and physiologically based extractions indicatenthat physical and chemical weathering have shiftednmetals into relatively labile and bioaccessible mineralnphases. In <37 μm mine waste particles, 50−65% of Zn,nPb, and Cd were present in the “exchangeable” andn“carbonate” sequential extraction fractions, and 60−80%nof Zn, Pb, and Cd were mobilized in synthetic gastric fluid,nwhile ZnS and PbS exhibited minimal solubility in thesensolutions. Our results demonstrate the importance of site-specific characterization of size-fractionated contemporarynmine waste when assessing the lability and bioavailabilitynof metals at mine-waste impacted sites.","PeriodicalId":522808,"journal":{"name":"Figshare","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2016-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://figshare.com/articles/journal_contribution/Characterization_of_Zinc_Lead_and_Cadmium_in_Mine_Waste_Implications_for_Transport_Exposure_and_Bioavailability/3004015","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147904065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}