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High gradient magnetic separation of some soil clays from Nigeria, Brazil and Colombia.
Author(s) -
HUGHES J. C.
Publication year - 1982
Publication title -
journal of soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.244
H-Index - 111
eISSN - 1365-2389
pISSN - 0022-4588
DOI - 10.1111/j.1365-2389.1982.tb01785.x
Subject(s) - tailings , magnetic separation , soil water , oxalate , fraction (chemistry) , carbon fibers , environmental chemistry , chemistry , geology , mineralogy , soil science , materials science , metallurgy , inorganic chemistry , chromatography , composite number , composite material
Summary High gradient magnetic separation was used to fractionate the clay from some tropical soils. Acid‐oxalate‐extractable iron (Fe ox ) and aluminium (Al ox ) and total carbon were measured in the whole clay, the magnetic fraction and the tailings. The magnetic separation resulted in a wider range of concentrations of these elements than in the whole clays. In each of the clays Fe ox was greater in the magnetic fraction than in the tailings; Al ox was more variable. Carbon was also concentrated in the magnetic fraction suggesting that it is associated more with Fe ox than Al ox . The relationships between Fe ox , Al ox and carbon depend on soil classification and soil age.