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Showing 1 to 8 of 8 for “"Chemical Fractionation"”.
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Determination and statistical evaluation of the effect of minerals and mineral associations in specific dense medium fractions on ash fusion temperature
… ratios. The combined removal of Ca, Mg and Fe by chemical fractionation resulted in an increase in ash fusion temperature. Different combinations of minerals were removed by different leaching agents. Chemical fractionation selectively altered the mineral content of coal which in turn provided …
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Petrogenesis and geochemistry of kyanite-bearing pegmatites in the Buncombe Pegmatite District, North Carolina
… the pegmatite show clear patterns related to chemical fractionation of these components during crystallization. Major element geochemistry of the pegmatite and host ,I rocks are consistent with magmatic intrusion. Reaction of the pegmatite melt with the host rocks led to the formation of large …
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The use of simultaneous chemical precipitation in modified activated sludge systems exhibiting biological enhanced phosphate removal
… with discharge standards. Simultaneous chemical addition in the activated sludge systems is a practical and economically attractive means of increasing the phosphate (P) removal capacity of these systems. However, it is also clear that the economic benefit of building a BEPR system could …
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Influence of Operational Characterization Methods on DOM Physicochemical Properties and Reactivity with Aqueous Chlorine
The physicochemical properties and chemical reactivity of dissolved organic matter (DOM) are of tremendous practical significance in both natural and engineered aquatic and terrestrial systems. DOM is frequently extracted, fractionated, and concentrated from environmental samples using a variety of …
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A kinetic transport model of uranium molecular species formation in a laser ablated plasma plume
… nuclear debris. The issue is complicated by fractionation processes that result in the formation of nuclear debris whose composition does not directly reflect that of the source weapon. Furthermore, the volatility of uranium in atmospheric environments results in complex fractionation …
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Molybdenum toxicity in the developing chick embryo
… the shell be considered in future studies. A chemical fractionation of the eggs from the hens fed the molybdenum containing diet indicated that very little of the molybdenum was present in the lipid fraction. Twenty-five percent of the total egg molybdenum was found to be associated with the …
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Optimizing high-rate activated sludge: organic substrate for biological nitrogen removal and energy recovery
… sludge (HRAS) process destroys some of the chemical energy present in municipal wastewater, this process has been gaining attention as a viable technology for achieving energy neutrality at water resource recovery facilities. In addition to carbon capture for energy recovery, A-stages are …
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Phosphorus fate and management on the Somerset Levels and Moors Ramsar ditch systems
… near key inlets and the outlet. Based upon their chemical and physical properties, clear distinction was observed between sites outside and within the Royal Society of the Protection of Birds nature reserve, using principal component analysis. Secondly, an investigation assessed the chemical …