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- W2350753651 abstract "The occurrence states of trace metal elements in lignite humic acid were researched using grating spectrograph and ICP-AES.Firstly,humic acid was obtained from lignite by alkali extraction and acid precipitation;using grating spectrograph legal identified containing metal elements calcium,aluminum,copper and titanium.Secondly,those trace metal elements in humic acid were divided into five parts:exchangeable,carbonate bound,oxide bound,organic matter bound,residue,by the method of sequential extraction separation;the content of trace metal elements in those parts were determined using ICP-AES.The results show the 99.13% distribution of copper in residual;74.84% distribution of aluminium in organic matter bound,21.05% in residual;9.04% distribution of titanium in organic matter bound,80.18% in residual;14.14%distribution of calcium in exchangeable,11.82% in organic matter bound,68.27% in residual.So the element of copper in humic acid is mainly to residual presence,titanium and aluminum is mainly to organic matter binding condition and residual state,calcium is mainly to exchangeable,organic matter binding condition and residual state.Metal ions in exchangeable and oxide bound is mainly calcium,the second is aluminum;organic matter bound metal ions is mainly calcium,the second is aluminum and copper;organic matter bound is mainly aluminum,the second is calcium." @default.
- W2350753651 created "2016-06-24" @default.
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- W2350753651 date "2013-01-01" @default.
- W2350753651 modified "2023-09-24" @default.
- W2350753651 title "Occurrence State of Trace Metal Elements in Lignite Humic Acid" @default.
- W2350753651 hasPublicationYear "2013" @default.
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