Using spectroscopy and satellite imagery to assess the total iron content of soils in the Judean Desert (Israel)

2012 ◽  
Author(s):  
T. Jarmer
Keyword(s):  
Satellite Imagery ◽  
Iron Content ◽  
Total Iron ◽  
Total Iron Content

Clay mineralogy of parent materials derived from uppermost Cretaceous and Tertiary sedimentary rocks in southern Saskatchewan

1993 ◽  
Vol 73 (4) ◽  
pp. 447-457 ◽  
Author(s):  
W. E. Dubbin ◽  
A. R. Mermut ◽  
H. P. W. Rostad
Keyword(s):  
Organic Carbon ◽  
Iron Content ◽  
Sedimentary Rocks ◽  
Clay Mineralogy ◽  
Total Iron ◽  
Total Iron Content ◽  
Parent Materials ◽  
Surface Areas ◽  
General Chemical ◽  
Detailed Chemical

Soils developed from parent materials derived from uppermost Cretaceous and Tertiary sedimentary rocks have been delineated from those which do not contain any of these younger sediments. The present study was initiated to determine the validity of this delineation. Parent materials from six locations in southwestern Saskatchewan were collected to determine their general chemical and physical properties. Clay fractions from each of these six parent materials were then subjected to detailed chemical and mineralogical analyses. The two parent materials containing the greatest amount of post-Bearpaw bedrock sediments (Jones Creek, Scotsguard) were characterized by substantially more organic carbon and less CaCO3. The presence of coal and the absence of carbonates in local bedrocks were considered to be the source of these deviations. In general, fine clays were comprised of 64–69% smectite, 14–21% illite and 10–13% kaolinite and coarse clay contained 32–39% smectite, 25–34% illite and 11–14% kaolinite. An exception was found in two fine clays which had less smectite but 3–6% vermiculite. Total iron content of the fine clays ranged from 7.16 to 8.11% expressed as Fe2O3. However, only a small fraction of this iron was extractable using the CDB technique. There were no substantial differences in surface areas or CECs of the clay fractions. Despite minor differences in the chemistry and mineralogy of these six parent materials, a separation of the soil associations does not appear to be warranted. Key words: Parent materials, uppermost Cretaceous, Tertiary, bedrock, clay mineralogy

scholarly journals Micronutrients as Impurities of Inorganic Fertilizers Marketed in Saudi Arabia

2000 ◽  
Vol 5 (2) ◽  
pp. 91
Author(s):  
A.S. Modaihsh ◽  
A.E. Abdallah ◽  
A.S. Mashhady
Keyword(s):  
Saudi Arabia ◽  
Iron Content ◽  
Total Content ◽  
Total Iron ◽  
Water Soluble ◽  
Total Iron Content ◽  
Inorganic Fertilizers ◽  
Major Nutrients ◽  
One Year ◽  
Phosphatic Fertilizers

Inorganic fertilizers with major nutrients are likely to be contaminated with some micronutrients. Fertilizers, utilized in Saudi Arabia, were analyzed for their total and water-soluble content of Fe, Zn, Mn and Cu. They represented three categories namely: phosphatic, solid multiple nutrient fertilizers (SMNF) and water-soluble multiple nutrient fertilizers (WSMF). Total iron content in examined fertilizers was higher in phosphatic fertilizers and lower in WSMF. Nevertheless, only a very small portion of the total iron content is likely to be available to plants. It was estimated, on the basis of total content, that almost 2 g of iron would be applied to soil for each added kg of phosphatic fertilizer. The highest total content of Zn was recorded for phosphatic fertilizers. The data suggested that less than half kg of Zn would be accumulated in soil if 500 kg of phosphatic fertilizers were applied in one year. This value however, fell dramatically, to one fourth of the value, when only the available forms of Zn were considered. Fertilizer content of manganese and copper were lower than both Fe and Zn. Micronutrient impurities present in inorganic fertilizers might not have an immediate influence on plant nutrition due to their lower solubility.  

scholarly journals Removal of Metallic Iron from Reduced Ilmenite by Aeration Leaching

Metals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1020
Author(s):  
Qiuyue Zhao ◽  
Maoyuan Li ◽  
Lei Zhou ◽  
Mingzhao Zheng ◽  
Ting’an Zhang
Keyword(s):  
Iron Content ◽  
Metallic Iron ◽  
Carbothermic Reduction ◽  
Room Temperature ◽  
Total Iron ◽  
Total Iron Content ◽  
Tio2 Content ◽  
Synthetic Rutile ◽  
Ilmenite Concentrate ◽  
Hcl Solution

Aeration leaching was used to obtain synthetic rutile from a reduced ilmenite. The reduced ilmenite, obtained from the carbothermic reduction of ilmenite concentrate in a rotary kiln at about 1100 °C, contained 62.88% TiO2 and 28.93% Metallic iron. The particle size was about 200 μm and the size distribution was uniform. The effects of NH4Cl and HCl concentrations, stirring speed, and aeration leaching time on the extent of removal of metallic iron from the reduced ilmenite were studied at room temperature. The results revealed that aeration leaching is feasible at room temperature. When using the NH4Cl system, the metallic iron content was reduced to 1.98% in synthetic rutile, but the TiO2 content only reached 69.16%. Higher NH4Cl concentration did not improve the leaching. Using 2% NH4Cl with 3% HCl, we were able to upgrade the synthetic rutile to 75%, with a metallic iron content as low as 0.14% and a total iron content of about 4%. Synthetic rutile could be upgraded to about 90% using HCl solution alone. HCl and NH4Cl are both effective on the aeration leaching process. However, within the scope of this experiment, hydrochloric acid is more efficient in aeration leaching.

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