Effect of Cyclodextrins on Surface and Pore Properties of Soil Clay Minerals

2001 ◽  
Vol 35 (24) ◽  
pp. 4947-4952 ◽  
Author(s):  
Grzegorz Jozefaciuk ◽  
Attila Muranyi ◽  
Eva Fenyvesi
Keyword(s):  
Clay Minerals ◽  
Soil Clay ◽  
Pore Properties ◽  
Properties Of Soil

Physical, chemical, and mineralogical attributes and organic fractions of biogenic aggregates of earthworms and toposequence of Inceptisol in semi-arid region

2021 ◽  
Vol 45 ◽  
Author(s):  
Eula Paula da Silva Santos ◽  
Flavia Giglianne Freitas Lima ◽  
Eulene Francisco da Silva ◽  
Diana Ferreira de Freitas ◽  
Eveline de Almeida Ferreira ◽  
...  
Keyword(s):  
Clay Minerals ◽  
Arid Region ◽  
Organic Fraction ◽  
Neem Tree ◽  
Physical Chemical ◽  
Organic Fractions ◽  
Semi Arid Region ◽  
Lower Slope ◽  
Semi Arid ◽  
Properties Of Soil

ABSTRACT Earthworms are known to improve soil fertility by altering the physicochemical properties of soil. However, the changes in properties of biogenic aggregates (produced by earthworms) in regions with different vegetation covers and soils of Inceptisol toposequence in the semi-arid region have not been studied. The objective of this work was to determine the variations of the physical, chemical, and mineralogical attributes and organic fractions of biogenic aggregates of earthworms under different vegetation covers and compare them to an Inceptisol toposequence in the semi-arid region of Pernambuco State, Brazil. For this study, four Inceptisol soil profiles were selected. The sampled points were P1-upper; P2-middle third; P3-middle third; and P4-lower slope, and the soils were collected at a depth of 0-0.20 m. The biogenic aggregates were found in the P3 samples collected from three areas with different vegetation covers: an area with mesquite tree vegetation (Prosopis juliflora [Sw] D.C.); an area with neem tree vegetation (Azadirachta indica A. Juss); and an area with forage palm and mesquite tree vegetation (Opuntia sp. and Nopalea sp.). Results indicate that the biogenic aggregates were in the form of irregular blocks with a size greater than 40 mm. As compared to Inceptisol samples, these aggregates tended to select particles of smaller diameter and exhibited higher concentrations of clay minerals. The chemical and organic fraction analysis revealed that the aggregates exhibited higher Ca2+, total organic carbon (TOC), labile and humic substances, regardless of the vegetation cover. The mineralogical analysis revealed that the action of earthworms did not change the quantity or type of clay minerals.

Crystal structure model development for soil clay minerals – I. Hydroxy-interlayered smectite (HIS) synthesized from bentonite. A multi-analytical study

Geoderma ◽  
2019 ◽  
Vol 347 ◽  
pp. 135-149 ◽  
Author(s):  
Jan Dietel ◽  
Jens Gröger-Trampe ◽  
Marko Bertmer ◽  
Stephan Kaufhold ◽  
Kristian Ufer ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Clay Minerals ◽  
Analytical Study ◽  
Model Development ◽  
Structure Model ◽  
Soil Clay

Trioctahedral minerals in the soil-clays of north-east Scotland

1950 ◽  
Vol 29 (208) ◽  
pp. 72-84 ◽  
Author(s):  
G. F. Walker
Keyword(s):  
Clay Minerals ◽  
Decomposition Products ◽  
Widespread Distribution ◽  
North East ◽  
The North ◽  
Soil Clays ◽  
The Subject ◽  
Soil Clay

This paper deals with a series of soil-clay minerals which have a widespread distribution in the north-east of Scotland. The original member is a biotite-like mica which breaks down readily in the soil into (i) a vermiculite or (ii) a montmorillonite, depending on the soil-forming conditions operating. Apart from this 'clay biotite' and its decomposition products, the main crystalline constituents of the Scottish soil-clays are a member of the kaolinite group and illite (' clay muscovite'). Iron and aluminium oxides are present in all the clays in the amorphous condition, but crystalline varieties are scarce. The distribution of the minerals and their relationship to the various soft-forming factors will form the subject of a separate communication; here, the nature of the clay minerals and their interrelationships are considered.

A simple empirical model for phenanthrene adsorption on soil clay minerals

2021 ◽  
pp. 127849
Author(s):  
Nan Zhao ◽  
Feng Ju ◽  
Quanwei Song ◽  
Hui Pan ◽  
Hao Ling
Keyword(s):  
Clay Minerals ◽  
Empirical Model ◽  
Soil Clay ◽  
Simple Empirical Model
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