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Cretaceous-paleogene boundary clays from Spain and New Zealand: arsenic anomaly and the Deccan Traps

100%

Premovic P. I.

International Letters of Natural Sciences

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2016

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tom 55

High arsenic (As) contents have been reported in numerous Cretaceous-Paleogene boundary (KPB) clays worldwide including those from Spain (at Caravaca and Agost) and N. Zealand (at Woodside Creek). The Deccan Traps (India) enormous volcanism is one of the interpretations which have been offered to explain this anomaly. This report shows that the estimated surface densities of As in the boundary clays in Spain and New Zealand strongly contradict that anomalous As was sourced by this volcanic event.

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The influence of the mineral composition of the clay fraction on zinc sorption in rendzina soils

100%

Zagorski Z.

Polish Journal of Soil Science

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2002

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tom 35

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nr 1

Zinc sorption was tested through four mineralogically diverse clay fractions of rendzina soils. The value and mechanisms of Zn sorption are strictly linked to the mineralogical composition of the clay fraction. Analysis of the variation of the buffer coefficient da/dCe, calculated according to the Freundlich isotherm, indicates that the fractions containing prevailing quantities of smectite, illite or kaolinite sorb Zn exchangeably (not specifically). Zn bonding in the smectite fraction is feeblest. The fraction containing opal CT adsorbs Zn permanently (specifically).

3

Intensity of tillage of wet soil and the effects on soil structural condition

100%

Watts C. W., Dexter A. R.

Bibliotheca Fragmenta Agronomica

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1997

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tom 2B

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The effect of removal of organic matter, iron oxides and aluminum oxides on the micropore characteristics of the soil clay fraction

67%

Jozefaciuk G., Sokolowska Z.

Polish Journal of Soil Science

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2003

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tom 36

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nr 2

111-119

Surface-micropore properties of the clay fractions of several soils before and after removal of a particular clay fraction components: organic matter, iron oxides and aluminum oxides were studied with an application of the water vapor adsorption-desorption method. Changes in micropore radii, volumes and fractal dimensions were observed after the removal of each component.

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Zawartość Pb, Zn, Cu w glebach przy drogach o różnym natężeniu ruchu w okolicach Łodzi

67%

Laskowsk S., Toloczko W., Rolka M.

Acta Agrophysica

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2001

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tom 56

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Cation exchange capacity of clay rich soils in relation to mineralogical composition and organic matter content

67%

Dabkowska-Naskret H., Jaworska H., Kobierski M.

Acta Agrophysica

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2001

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tom 50

Contribution of clay mineral phase (<2 um) and organic matter to the cation exchange capacity (CEC) of two clayey soils (gleyic black earths from Gniew) was investigated. The XRD analysis showed dominance of illite and mixed laver illite/smectite as well as the presence of smectite, chlorite and trace of kaolinite in the clay fraction of studied soils. CEC of the soils ranged between 22.08-32.64 cmol(+)/kg. After removal of organic matter with 30% H2O2, CEC the above values decreased significantly. However, the CEC of organic and inorganic components is not an additive. This may be explained by the formation of organo-mineral complexes, which might lower the CEC of the soil as a whole.

Ograniczanie wyników

2 Acta Agrophysica

2 Polish Journal of Soil Science

1 Bibliotheca Fragmenta Agronomica

1 International Letters of Natural Sciences

1 Dabkowska-Naskret H.

1 Dexter A. R.

1 Jaworska H.

1 Jozefaciuk G.

1 Kobierski M.

1 Laskowsk S.

1 Premovic P. I.

1 Rolka M.

1 Sokolowska Z.

1 Toloczko W.

1 Watts C. W.

1 Zagorski Z.

1 2016

1 2003

1 2002

2 2001

1 1997

Cretaceous-paleogene boundary clays from Spain and New Zealand: arsenic anomaly and the Deccan Traps

The influence of the mineral composition of the clay fraction on zinc sorption in rendzina soils

Intensity of tillage of wet soil and the effects on soil structural condition

The effect of removal of organic matter, iron oxides and aluminum oxides on the micropore characteristics of the soil clay fraction

Zawartość Pb, Zn, Cu w glebach przy drogach o różnym natężeniu ruchu w okolicach Łodzi

Cation exchange capacity of clay rich soils in relation to mineralogical composition and organic matter content