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- W2012590773 abstract "Asymmetric-Flow Field-Flow Fractionation (AsFlFFF) coupled to an inductively coupled plasma-mass spectrometer (ICP-MS) was used to determine whether colloidal As exists in mine tailings from abandoned Au mine sites in Nova Scotia. Using this technique, the chemical composition and the size of the colloidal material was determined. Tailings samples were collected from the sites and leachates were analyzed. The resulting fractograms showed the presence of colloidal As. Arsenic co-elutes with Fe and Al suggesting that the As is associated with colloids containing these elements. The colloidal material present in the samples has a calculated median size of 7 nm. The leachates were also analyzed for totalAs, Fe and Al using ICP-MS. The colloidal fraction was determined to account for approximately 20% of the total dissolved As present in these samples. Dissolved As concentrations at the selected mine sites are very high and the arbitrary cutoff for dissolved still incorporates colloidal material. Therefore. it is important to distinguish between truly dissolved and colloidal As as the speciation will affect the toxicity and mobility of As at these locations." @default.
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- W2012590773 date "2011-06-01" @default.
- W2012590773 modified "2023-09-24" @default.
- W2012590773 title "Colloidal arsenic composition from abandoned gold mine tailing leachates in Nova Scotia, Canada" @default.
- W2012590773 cites W2016673562 @default.
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- W2012590773 doi "https://doi.org/10.1016/j.apgeochem.2011.03.119" @default.
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