Matches in SemOpenAlex for { <https://semopenalex.org/work/W1988149157> ?p ?o ?g. }
- W1988149157 endingPage "1110" @default.
- W1988149157 startingPage "1095" @default.
- W1988149157 abstract "The exchange of 226Ra and trace metals across the tailings-water interface and the mechanisms governing their mobility were assessed via sub-centimetre resolution profiling of dissolved constituents across the tailings–water interface in Cell 14 of the Quirke Waste Management Area at Rio Algom's Quirke Mine, near Elliot Lake, Ontario, Canada. Shallow zones (<1.5 m water depth) are characterized by sparse filamentous vegetation, well-mixed water columns and fully oxygenated bottom waters. Profiles of dissolved O2, Fe and Mn indicate that the tailings deposits in these areas are sub-oxic below tailings depths of ∼3 cm. These zones exhibit minor remobilization of Ra in the upper 5 cm of the tailings deposit; 226Ra fluxes at these sites are relatively small, and contribute negligibly to the water column activity of 226Ra. The shallow areas also exhibit minor remobilization of Ni, As, Mo and U. The release of these elements to the water cover is, however, limited by scavenging mechanisms in the interfacial oxic horizons. The presence of thick vegetation (Chara sp.) in the deeper areas (>2 m water depth) fosters stagnant bottom waters and permits the development of anoxia above the benthic boundary. These anoxic tailings are characterized by substantial remobilization of 226Ra, resulting in a relatively large flux of 226Ra from the tailings to the water column. The strong correlation between the porewater profiles of 226Ra and Ba (r2=0.99), as well as solubility calculations, indicate that the mobility of Ra is controlled by saturation with respect to a poorly ordered and/or impure barite phase [(Ra,Ba)SO4]. In the anoxic zones, severe undersaturation with respect to barite is sustained by microbial SO4 reduction. Flux calculations suggest that the increase in 226Ra activity in the water cover since 1995 (from <0.5 to 2.5 Bq l−1) can be attributed to an increase in the spatial distribution of anoxic bottom waters caused by increased density of benthic flora. The anoxic, vegetated areas also exhibit minor remobilization with respect to dissolved As, Ni and Zn. The removal of trace metals in the anoxic bottom waters appears to be limited by the availability of free sulphide. Collectively, the data demonstrate that while the water cover over the U mill tailings minimizes sulphide oxidation and metal mobility, anoxic conditions which have developed in deeper areas have led to increased mobility of 226Ra." @default.
- W1988149157 created "2016-06-24" @default.
- W1988149157 creator A5017111348 @default.
- W1988149157 creator A5028499857 @default.
- W1988149157 creator A5079507777 @default.
- W1988149157 creator A5089196848 @default.
- W1988149157 date "2003-07-01" @default.
- W1988149157 modified "2023-09-27" @default.
- W1988149157 title "The mobility of radium-226 and trace metals in pre-oxidized subaqueous uranium mill tailings" @default.
- W1988149157 cites W142039677 @default.
- W1988149157 cites W1515488668 @default.
- W1988149157 cites W1531848458 @default.
- W1988149157 cites W1788393526 @default.
- W1988149157 cites W1967028424 @default.
- W1988149157 cites W1978591698 @default.
- W1988149157 cites W1978630738 @default.
- W1988149157 cites W1995706097 @default.
- W1988149157 cites W1996896453 @default.
- W1988149157 cites W2002240909 @default.
- W1988149157 cites W2007298871 @default.
- W1988149157 cites W2008130957 @default.
- W1988149157 cites W2012915822 @default.
- W1988149157 cites W2013086016 @default.
- W1988149157 cites W2015104249 @default.
- W1988149157 cites W2018326858 @default.
- W1988149157 cites W2020941185 @default.
- W1988149157 cites W2023068580 @default.
- W1988149157 cites W2032516184 @default.
- W1988149157 cites W2035803372 @default.
- W1988149157 cites W2043668123 @default.
- W1988149157 cites W2044165821 @default.
- W1988149157 cites W2044233272 @default.
- W1988149157 cites W2054645658 @default.
- W1988149157 cites W2061323511 @default.
- W1988149157 cites W2061785747 @default.
- W1988149157 cites W2063656463 @default.
- W1988149157 cites W2080034641 @default.
- W1988149157 cites W2080182619 @default.
- W1988149157 cites W2081706904 @default.
- W1988149157 cites W2084769260 @default.
- W1988149157 cites W2091231417 @default.
- W1988149157 cites W2095542878 @default.
- W1988149157 cites W2116391933 @default.
- W1988149157 cites W2119921272 @default.
- W1988149157 cites W2133779890 @default.
- W1988149157 cites W2909287446 @default.
- W1988149157 cites W4246181416 @default.
- W1988149157 doi "https://doi.org/10.1016/s0883-2927(02)00243-3" @default.
- W1988149157 hasPublicationYear "2003" @default.
- W1988149157 type Work @default.
- W1988149157 sameAs 1988149157 @default.
- W1988149157 citedByCount "58" @default.
- W1988149157 countsByYear W19881491572012 @default.
- W1988149157 countsByYear W19881491572013 @default.
- W1988149157 countsByYear W19881491572014 @default.
- W1988149157 countsByYear W19881491572015 @default.
- W1988149157 countsByYear W19881491572016 @default.
- W1988149157 countsByYear W19881491572017 @default.
- W1988149157 countsByYear W19881491572018 @default.
- W1988149157 countsByYear W19881491572019 @default.
- W1988149157 countsByYear W19881491572020 @default.
- W1988149157 countsByYear W19881491572021 @default.
- W1988149157 countsByYear W19881491572022 @default.
- W1988149157 countsByYear W19881491572023 @default.
- W1988149157 crossrefType "journal-article" @default.
- W1988149157 hasAuthorship W1988149157A5017111348 @default.
- W1988149157 hasAuthorship W1988149157A5028499857 @default.
- W1988149157 hasAuthorship W1988149157A5079507777 @default.
- W1988149157 hasAuthorship W1988149157A5089196848 @default.
- W1988149157 hasConcept C107872376 @default.
- W1988149157 hasConcept C108970007 @default.
- W1988149157 hasConcept C111368507 @default.
- W1988149157 hasConcept C114793014 @default.
- W1988149157 hasConcept C122846477 @default.
- W1988149157 hasConcept C127313418 @default.
- W1988149157 hasConcept C147789679 @default.
- W1988149157 hasConcept C167391731 @default.
- W1988149157 hasConcept C17409809 @default.
- W1988149157 hasConcept C177322064 @default.
- W1988149157 hasConcept C185592680 @default.
- W1988149157 hasConcept C187320778 @default.
- W1988149157 hasConcept C191897082 @default.
- W1988149157 hasConcept C192562407 @default.
- W1988149157 hasConcept C5166401 @default.
- W1988149157 hasConcept C550196577 @default.
- W1988149157 hasConcept C555451288 @default.
- W1988149157 hasConcept C76886044 @default.
- W1988149157 hasConceptScore W1988149157C107872376 @default.
- W1988149157 hasConceptScore W1988149157C108970007 @default.
- W1988149157 hasConceptScore W1988149157C111368507 @default.
- W1988149157 hasConceptScore W1988149157C114793014 @default.
- W1988149157 hasConceptScore W1988149157C122846477 @default.
- W1988149157 hasConceptScore W1988149157C127313418 @default.
- W1988149157 hasConceptScore W1988149157C147789679 @default.
- W1988149157 hasConceptScore W1988149157C167391731 @default.
- W1988149157 hasConceptScore W1988149157C17409809 @default.
- W1988149157 hasConceptScore W1988149157C177322064 @default.
- W1988149157 hasConceptScore W1988149157C185592680 @default.