Magnetic susceptibility of a saprolite and a soil profile developed on pyroxenite at Mont-Saint-Bruno, Quebec, Canada

2001 ◽  
Vol 81 (2) ◽  
pp. 185-192
Author(s):  
C R De Kimpe ◽  
J. Dejou ◽  
Y. Chevalier
Keyword(s):  
Particle Size ◽  
Magnetic Susceptibility ◽  
Chemical Composition ◽  
Key Words ◽  
Soil Profile ◽  
Additional Information ◽  
Fe Oxides ◽  
Ti Oxides ◽  
Opaque Minerals ◽  
High Magnetic Susceptibility

Magnetic susceptibility (χ) measurements were performed with a recording magnetic susceptivimeter on a pyroxenite and its alteration products, i.e., a saprolite and the horizons of a soil profile. Pyroxenite contains a relatively high percentage of opaque minerals that, under alteration, transformed partly into Fe oxides with a high magnetic susceptibility. In the saprolite and the soil, χ values varied according to depth in the profile, particle size, mineralogical and chemical composition. Significant correlations between χ values and Fe and Ti oxides indicated the importance of opaque minerals, magnetite, maghemite and ilmenite to the magnetic susceptibility of the alteration products of the pyroxenite. This method provided additional information on the intensity of the alteration of the rock, especially on the formation of secondary Fe oxides at the expense of the ferromagnesian minerals. Key words: Magnetic susceptibility, pyroxenite, saprolite, maghetite, maghemite, opaque minerals

scholarly journals Total chemical composition of chornozems of Socal-Tortchin range upland

2013 ◽  
pp. 265-274 ◽  
Author(s):  
Igor Papish
Keyword(s):  
Chemical Composition ◽  
Key Words ◽  
Cultural Evolution ◽  
Soil Profile ◽  
Soil Formation ◽  
Genetic Subtypes ◽  
Typical Chernozems ◽  
Composition Structure

The results are given on total chemical composition of podzolic and typical chernozems of the Socal-Tortchin range upland. The geographical features of forming of morphological profile of chernozems of Volyn upland are educed. Connection is shown between different genetic subtypes of chernozems and chemical composition them silicate part. The cultural constituent of soil formation is educed in forming of morphological profile of deep chernozems on terrace localities of Volyn Pobuzia. Key words: chernozems, total chemical composition, structure of the soil profile, morphological signs, cultural evolution of soils.

scholarly journals Fe-Ti-V ASSOCIADO AO GABRO DE LÍDICE, ESTADO DO RIO DE JANEIRO

2016 ◽  
Author(s):  
Ronaldo Mello Pereira ◽  
Marcelo dos Santos Salomão ◽  
Reiner Neumann ◽  
Paulo Guimarães ◽  
Enrico Pedroso
Keyword(s):  
Magnetic Susceptibility ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Rio De Janeiro ◽  
Chemical Analyses ◽  
Ti Oxides ◽  
Icp Ms ◽  
Opaque Minerals ◽  
Titanium Vanadium ◽  
Janeiro State

ResumoO Gabro de Lídice corresponde a um corpo tabular, com cerca de 4,0 quilômetros de extensão e espessura entre 100 e 200 metros, constituído por hiperstênio, diopsídio, olivina, plagioclásio e minerais opacos (óxidos de Fe e Ti). Assinaturas petrográfica e geoquímica indicam caráter toleítico, entre os campos alcalino e subalcalino. O enriquecimento em V é de 2 a 3 vezes maior do que o clarck esperado para tal tipo de rocha. O principal óxido é a titanomagnetita, com inclusões e exsoluções de ilmenita. O vanádio concentra-se principalmente na titanomagnetita, variando os teores entre 0,68% e 2,07% de V2O5. Análises ICP-MS em pré-concentrado de titanomagnetita forneceram teores de 50,86% de Fe2O3t, 13,56% de TiO2 e 3.721 ppm de vanádio (~ 0,66% de V2O5). Quimicamente a ilmenita tem conteúdo em Fe2O3t (46,75% a 48,80%) e TiO2 (49,99% a 51,36%). Amostras enriquecidas em titanomagnetita exibem valores dos elementos terras raras e traço 30 vezes inferiores aos observados nas demais amostras. Ao longo de todo o corpo, a susceptibilidade magnética varia em escala centimétrica a decimétrica e está associada a concentrações anômalas de titanomagnetita na rocha, o que pode representar um bandamento magmático. Os dados apresentados sugerem uma origem associada a ambiente intraplaca.Palavras Chave: Gabro, titanomagnetita, ilmenita, titânio, vanádio.AbstractFe-Ti-V ASSOCIATED WITH LIDICE GABBRO, RIO DE JANEIRO STATE. The Gabbro of Lidice has about 4.0 km in length and thickness between 100 and 200 meters, consisting of pyroxene, olivine, plagioclase and opaque minerals (Fe and Ti oxides). Petrographic and geochemical signatures indicate toleitic character, between the alkaline and subalcalino fields. Vanadium enrichment is from 2 to 3 times higher than the expected clarck for such rock. The main oxide is titanomagnetite, with inclusions and exsolutions of ilmenite. Vanadium (0,68% to 2,07% V2O5) is mainly concentrated in titanomagnetite. ICP-MS analyses in pre-concentrated of titanomagnetite provided levels of 50.86% of Fe2O3t, 13.56% of TiO2 and 3,721 ppm of vanadium (~ 0.66% de V2O5). Chemical analyses of ilmenite show content in Fe2O3t (from 46.75% to 48.80%) and TiO2 (from 49.99% to 51.36%). Samples enriched with titanomagnetite display values of trace and rare earth elements 30 times lower than those observed in other samples. Throughout the gabbro, the magnetic susceptibility varies from centimeter to decimeter scales and is associated with abnormal concentrations of titanomagnetite, which may represent magmatic banding. The data presented may suggest an origin associated with intraplate environment.Keywords: Gabbro, titanomagnetite, ilmenite, titanium, vanadium.

scholarly journals The Relationship between Soil Electrical Parameters and Compaction of Sandy Clay Loam Soil

Agriculture ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 114
Author(s):  
Katarzyna Pentoś ◽  
Krzysztof Pieczarka ◽  
Kamil Serwata
Keyword(s):  
Electrical Conductivity ◽  
Magnetic Susceptibility ◽  
Precision Agriculture ◽  
Soil Compaction ◽  
Soil Layer ◽  
Soil Parameters ◽  
Soil Electrical Conductivity ◽  
Electrical Parameters ◽  
Management Zones ◽  
Additional Information

Soil spatial variability mapping allows the delimitation of the number of soil samples investigated to describe agricultural areas; it is crucial in precision agriculture. Electrical soil parameters are promising factors for the delimitation of management zones. One of the soil parameters that affects yield is soil compaction. The objective of this work was to indicate electrical parameters useful for the delimitation of management zones connected with soil compaction. For this purpose, the measurement of apparent soil electrical conductivity and magnetic susceptibility was conducted at two depths: 0.5 and 1 m. Soil compaction was measured for a soil layer at 0–0.5 m. Relationships between electrical soil parameters and soil compaction were modelled with the use of two types of neural networks—multilayer perceptron (MLP) and radial basis function (RBF). Better prediction quality was observed for RBF models. It can be stated that in the mathematical model, the apparent soil electrical conductivity affects soil compaction significantly more than magnetic susceptibility. However, magnetic susceptibility gives additional information about soil properties, and therefore, both electrical parameters should be used simultaneously for the delimitation of management zones.

scholarly journals Influencing Factors of the Mineral Carbonation Process of Iron Ore Mining Waste in Sequestering Atmospheric Carbon Dioxide

2021 ◽  
Vol 13 (4) ◽  
pp. 1866
Author(s):  
Noor Allesya Alis Ramli ◽  
Faradiella Mohd Kusin ◽  
Verma Loretta M. Molahid
Keyword(s):  
Carbon Dioxide ◽  
Particle Size ◽  
Chemical Composition ◽  
Iron Ore ◽  
Divalent Cations ◽  
Mining Industry ◽  
Mining Waste ◽  
Aluminum Silicate ◽  
Mineral Carbonation ◽  
Carbonation Process

Mining waste may contain potential minerals that can act as essential feedstock for long-term carbon sequestration through a mineral carbonation process. This study attempts to identify the mineralogical and chemical composition of iron ore mining waste alongside the effects of particle size, temperature, and pH on carbonation efficiency. The samples were found to be alkaline in nature (pH of 6.9–7.5) and contained small-sized particles of clay and silt, thus indicating their suitability for mineral carbonation reactions. Samples were composed of important silicate minerals needed for the formation of carbonates such as wollastonite, anorthite, diopside, perovskite, johannsenite, and magnesium aluminum silicate, and the Fe-bearing mineral magnetite. The presence of Fe2O3 (39.6–62.9%) and CaO (7.2–15.2%) indicated the potential of the waste to sequester carbon dioxide because these oxides are important divalent cations for mineral carbonation. The use of small-sized mine-waste particles enables the enhancement of carbonation efficiency, i.e., particles of <38 µm showed a greater extent of Fe and Ca carbonation efficiency (between 1.6–6.7%) compared to particles of <63 µm (0.9–5.7%) and 75 µm (0.7–6.0%). Increasing the reaction temperature from 80 °C to 150–200 °C resulted in a higher Fe and Ca carbonation efficiency of some samples between 0.9–5.8% and 0.8–4.0%, respectively. The effect of increasing the pH from 8–12 was notably observed in Fe carbonation efficiency of between 0.7–5.9% (pH 12) compared to 0.6–3.3% (pH 8). Ca carbonation efficiency was moderately observed (0.7–5.5%) as with the increasing pH between 8–10. Therefore, it has been evidenced that mineralogical and chemical composition were of great importance for the mineral carbonation process, and that the effects of particle size, pH, and temperature of iron mining waste were influential in determining carbonation efficiency. Findings would be beneficial for sustaining the mining industry while taking into account the issue of waste production in tackling the global carbon emission concerns.

scholarly journals Variation of the Chemical Composition of Waste Cooking Oils upon Bentonite Filtration

Resources ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 108 ◽  
Author(s):  
Alberto Mannu ◽  
Gina Vlahopoulou ◽  
Paolo Urgeghe ◽  
Monica Ferro ◽  
Alessandra Del Caro ◽  
...  
Keyword(s):  
Particle Size ◽  
Chemical Composition ◽  
Solid Phase ◽  
Volatile Fraction ◽  
X Ray Diffraction ◽  
Specific Chemical ◽  
Waste Cooking Oils ◽  
Main Components ◽  
Cooking Oils ◽  
Chemical Groups

The chemical composition and the color of samples of waste cooking oils (WCOs) were determined prior to and after filtration on two different pads of bentonite differing in particle size. The volatile fraction was monitored by headspace solid-phase microextraction (HS-SPME) coupled with gas-chromatography, while the variation of the composition of the main components was analyzed by 1H NMR. Both techniques allowed the detection of some decomposition products, such as polymers, terpenes, and derivatives of the Maillard process. The analysis of the chemical composition prior to and after bentonite treatment revealed a tendency for the clays to retain specific chemical groups (such as carboxylic acids or double bonds), independent of their particle size. A pair comparison test was conducted in order to detect the sensory differences of the intensity of aroma between the WCO treated with the two different bentonites. In addition, characterization of the bentonite by means of powder X-ray diffraction (XRD) and thermogravimetric measurements (TG) was performed.

Effect of nitrogen fertilization on yield, storage losses and chemical composition of winter cabbage

1991 ◽  
Vol 71 (3) ◽  
pp. 943-946 ◽  
Author(s):  
S. Freyman ◽  
P. M. Toivonen ◽  
W. C. Lin ◽  
P. W. Perrin ◽  
J. W. Hall
Keyword(s):  
Ascorbic Acid ◽  
Chemical Composition ◽  
Key Words ◽  
Nitrogen Fertilization ◽  
N Fertilization ◽  
Nitrogen Rate ◽  
N Application ◽  
Storage Losses ◽  
White Cabbage ◽  
Brassica Oleracea L

Increasing rates of field nitrogen (N) application (0, 100, 200, 300, 400 and 500 kg N ha−1) resulted in markedly higher yields of winter white cabbage (Brassica oleracea L. var. capitata 'Bartolo') due to larger head size. Glucose and fructose contents increased with increased nitrogen. In contrast, ascorbic acid and sucrose contents declined slightly with increased nitrogen. Nitrogen rate had little effect on storage losses. The results indicated that increased N fertilization provided overall benefit to cabbage production. Key words: Cabbage, nitrogen fertilization, storage losses, yield

scholarly journals Relationship between chemical composition and magnetic susceptibility in the alkaline volcanics from the Isparta area, SW Turkey

2010 ◽  
Vol 119 (6) ◽  
pp. 853-860 ◽  
Author(s):  
Ömer Elitok ◽  
Züheyr Kamaci ◽  
M. Nuri Dolmaz ◽  
Kamil Yılmaz ◽  
Meltem Şener
Keyword(s):  
Magnetic Susceptibility ◽  
Chemical Composition ◽  
Sw Turkey

Silyubum marianum, dandelion plants and their benefits

2021 ◽  
Vol 08 (03) ◽  
pp. 16-19
Author(s):  
Gülüstan Nağı qızı Əliyeva ◽  
Keyword(s):  
Chemical Composition ◽  
Key Words ◽  
Scientific Article ◽  
The World ◽  
Therapeutic Properties

The scientific article provides detailed information about silyubum marianum and dandelion. Their chemical composition, therapeutic properties against liver, bile and other diseases, and their use in cosmetology were discussed. The article also discusses the benefits of silymarin in the treatment of cancer and osteoporosis. The components of silyubum marianum and dandelion plants have been announced. Distribution zones of silyubum marianum and dandelion plants in the world and in Azerbaijan have been noted. The rules of use of plants are also reflected in the article. Key words: plant, silyumarin, thorns, liver, seeds, silibinin.Carduelis,carotene

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