Physiological and mineralogical properties of arsenic stressed oat seedlings grown hydroponically

2021 ◽  
pp. 1-21
Author(s):  
Molla Rahman Shaibur
Keyword(s):  
Mineralogical Properties

Magnetic, geochemical and mineralogical properties of sediments from karstic and flysch rivers of Croatia and Slovenia

2014 ◽  
Vol 72 (10) ◽  
pp. 3939-3953 ◽  
Author(s):  
Stanislav Frančišković-Bilinski ◽  
Robert Scholger ◽  
Halka Bilinski ◽  
Darko Tibljaš
Keyword(s):  
Mineralogical Properties

Radon emanation coefficients of several minerals: How they vary with physical and mineralogical properties

2017 ◽  
Vol 102 (7) ◽  
pp. 1375-1383 ◽  
Author(s):  
Katherine Krupp ◽  
Mark Baskaran ◽  
Sarah J. Brownlee
Keyword(s):  
Radon Emanation ◽  
Mineralogical Properties

scholarly journals Relationship between soil oxidizable carbon and physical, chemical and mineralogical properties of umbric ferralsols

2011 ◽  
Vol 35 (1) ◽  
pp. 25-40 ◽  
Author(s):  
Flávio Adriano Marques ◽  
Márcia Regina Calegari ◽  
Pablo Vidal-Torrado ◽  
Peter Buurman
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Clay Content ◽  
Selective Extraction ◽  
Total Carbon ◽  
Soil Matrix ◽  
Soil Variables ◽  
Physical Chemical ◽  
Mineralogical Properties ◽  
Extractable Al

The occurrence of Umbric Ferralsols with thick umbric epipedons (> 100 cm thickness) in humid Tropical and Subtropical areas is a paradox since the processes of organic matter decomposition in these environments are very efficient. Nevertheless, this soil type has been reported in areas in the Southeast and South of Brazil, and at some places in the Northeast. Aspects of the genesis and paleoenvironmental significance of these Ferralsols still need a better understanding. The processes that made the umbric horizons so thick and dark and contributed to the preservation of organic carbon (OC) at considerable depths in these soils are of special interest. In this study, eight Ferralsols with a thick umbric horizon (UF) under different vegetation types were sampled (tropical rain forest, tropical seasonal forest and savanna woodland) and their macromorphological, physical, chemical and mineralogical properties studied to detect soil characteristics that could explain the preservation of high carbon amounts at considerable depths. The studied UF are clayey to very clayey, strongly acidic, dystrophic, and Al-saturated and charcoal fragments are often scattered in the soil matrix. Kaolinites are the main clay minerals in the A and B horizons, followed by abundant gibbsite and hydroxyl-interlayered vermiculite. The latter was only found in UFs derived from basalt rock in the South of the country. Total carbon (TC) ranged from 5 to 101 g kg-1 in the umbric epipedon. Dichromate-oxidizable organic carbon represented nearly 75 % of TC in the thick A horizons, while non-oxidizable C, which includes recalcitrant C (e.g., charcoal), contributed to the remaining 25 % of TC. Carbon contents were not related to most of the inorganic soil variables studied, except for oxalate-extractable Al, which individually explained 69 % (P < 0.001) of the variability of TC in the umbric epipedon. Clay content was not suited as predictor of TC or of the other studied C forms. Bulk density, exchangeable Al3+, Al saturation, ECEC and other parameters obtained by selective extraction were not suitable as predictors of TC and other C forms. Interactions between organic matter and poorly crystalline minerals, as indicated by oxalate-extractable Al, appear to be one of the possible organic matter protection mechanisms of these soils.

scholarly journals PHYSICO-CHEMICAL AND MINERALOGICAL PROPERTIES OF A CLAY MINERAL DEPOSIT IN GEHEKU, KOGI STATE, NIGERIA

2020 ◽  
Vol 45 (4) ◽  
Author(s):  
E.E.I. Irabor ◽  
A. K. Okunkpolor
Keyword(s):  
Thermal Shock ◽  
Clay Minerals ◽  
Clay Mineral ◽  
Thermal Shock Resistance ◽  
Mineral Deposit ◽  
Swelling Property ◽  
Working Temperature ◽  
Mineralogical Properties ◽  
Physico Chemical ◽  
Shock Resistance

The physico-chemical and mineralogical properties of a clay mineral deposit in Geheku, Kogi State, Nigeria were assessed. The results of the study revealed that the deposit consisted of phyllosilicate minerals- Illite, montmorillonite, kaolinite, halloysite, almandine; other minerals present were quartz and ramsdellite. The clay minerals exhibited good swelling property, medium plasticity, good thermal shock resistance and apparent porosity; it had refractoriness below 1200 oC. The properties of the clay reflected the combined properties of the constituent clay and non-clay minerals which recommends it for a variety of applications which requires the blend of property though the working temperature must be below 1200 oC. The clay mineral deposit colours were influenced by the minerals almadine and ramsdellite.

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