Preferential uptake of Fe(III) by humic acid extracted from lignite

Studies of the interaction of humic acid, extracted from lignite, with cations showed that Mg(II), Co(II), Ni(II), Zn(II), Cu(II), Al(III) and Fe(III) form complexes with humic acid. Of these cations, Fe(III) has the greatest tendency to form complexes. The retention capacities are in the order Fe(...

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Bibliographic Details
Published in:Fuel (Guildford) 1994-02, Vol.73 (2), p.273-275
Main Authors: Baruah, Mrinal K., Upreti, Mahesh C.
Format: Article
Language:English
Subjects:
Applied sciences
Energy
Exact sciences and technology
extraction
Fuel processing. Carbochemistry and petrochemistry
Fuels
humic acids
lignite
Solid fuel processing (coal, coke, brown coal, peat, wood, etc.)
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Summary:Studies of the interaction of humic acid, extracted from lignite, with cations showed that Mg(II), Co(II), Ni(II), Zn(II), Cu(II), Al(III) and Fe(III) form complexes with humic acid. Of these cations, Fe(III) has the greatest tendency to form complexes. The retention capacities are in the order Fe( III) > Al( III) > Cu( II) > Zn( II) > Ni( II) > Co( II) > Mg( II). It may be significant that the cation which shows preferential uptake on the basis of increase in acidity has initially the greatest acidity.
ISSN:0016-2361
1873-7153
DOI:10.1016/0016-2361(94)90124-4