Identification of Mn-oxide minerals in some soils from Devon,UK, and their varying capacity to adsorb Co and Cu |
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Authors: | Henrietta M Lidiard Joy E Rae Andrew Parker |
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Institution: | (1) Postgraduate Research Institute for Sedimentology, University of Reading, Whiteknights, PO Box 227, RG6 2AB Reading, England;(2) Present address: Department of Environmental Science, University of Bradford, Phoenix Building, BD7 1DP West Yorkshire, England |
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Abstract: | A number of Mn-oxide minerals in soils from a farm in North Devon have been tentatively identified using a combination of
advanced analytical techniques: scanning electron microscopy (SEM), scanning electron microprobe (SEMP), X-ray diffraction
(XRD) and bulk chemical analysis by wet digestion followed by inductively-coupled plasma spectrometry (ICP). The minerals
lithiophorite and hollandite are thought to occur throughout the study area although there is considerable geographical variation
in the proportions of minerals present. Bimessite, vernadite, romanechite, todorokite and cryptomelane may also be present,
although in smaller amounts.
The use of SEMP, together with a simple sorption experiment, has allowed a study of the extent of uptake of Co and Cu by different
Mn-oxide minerals. Lithiophorite appears to take up Co and Cu more effectively than hollandite within a pH range of 4–6. |
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