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Showing 1 to 13 of 13 for “"residual fraction"”.
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High load limits of the controlled autoignition engine
… mode. Valve timing, and therefore trapped residual gas fraction, turbocharging, intake air heating, and exhaust gas recirculation (EGR) are all explored for their effects on the high load limit. A single-cylinder research engine is used to assess each of these effects. 91 RON gasoline is …
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Extension of the high load limit in the Homogeneous Charge Compression Ignition engine
… of intake temperatures, boost pressures, trapped residual fractions, equivalence ratios and external EGR ratios for a gasoline fueled HCCI engine. A significant finding was that the high load limit always occurs at the misfire limit and that for a given pressure rise rate constraint, the high load …
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Evaluation of Leachate Chemistry from Coal Refuse Blended and Layered with Fly Ash
… a significant portion of the elements in the residual fraction for the refuse/spoil substrates and in metal-oxide bound fractions for the ashes prior to leaching, and a general trend for a greater proportion of oxyanion elements to be associated with metal oxide fractions after leaching. …
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Examination of the high load limit of an HCCI engine
… the highest intake pressure. Unreasonably large residual fraction was required to achieve the NOx limit unless a three-way catalyst is used.The engine behavior in the operating trajectory to the HLL was examined by using two Primary Reference fuels (PRF60 and PRF90) and a fuel blended from …
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Evaluation of Metal Concentration in Water and Soil in the Southern Region of Lake Nacogdoches
… study, soil samples were separated into five fractions: exchangeable, adsorbed, organic bonded, carbonate, residual fraction (F1-F5). The reliability of the total metal concentration from the digestion of bulk sediment were summed and compared withthe sequential extractions of the same bulk …
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Hydrogeochemical and radiometric investigation of the uranium tailings Schneckenstein
… sediments. For the analysed elements, the non residual fraction is in association with the iron and manganese oxides. Hence, the decrease of the oxygen contents in the environment will increase their solubility. Assuming an equilibrium between most of the radionuclides in the uranium chain …
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The partitioning and mobility of metals in the Blesbokspruit
… from the following five operationally defined fractions: the exchangeable fraction, sensitive to changes in ionic concentration; the pH- sensitive bound to carbonates fraction; the redox-sensitive bound to Fe and Mn oxides and bound to organic matter fractions and essentially inert and …
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Investigation of pollution coming from copper, lead, and zinc mining, and factors controlling mobility and bioavailability of pollutants at Ecton Hill, Staffordshire, UK
… the bioavailability, leachability, and fractionation (using five-steps sequential extraction) of the metals in various soil phases were characterised using correlation matrix and principal component analysis (PCA) approaches. The GIS- based spatial analysis maps reveal that elevated …
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Investigation on Revegetation/ Phytoremediation of Campo Pisano abandoned mine area
… of the soil-plant system through X-ray diffraction (XRD) and scanning electron microscopy (SEM) • Zn,Pb and Cd concentration and its bioavailable fractions in contaminated substrates • the metal accumulation and translocation behaviour in P. halepensis compartments (roots, barks, wood and …
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The kinetics and mechanisms of destabilisation and aggregation of microcolloidal iron and associated phosphate during simulated estuarine mixing
The removal of iron from the <0.45µm fraction of Tamar River water on addition of both calcium chloride solution and sea water was studied using a continuous autoanalytical system. The addition of increasing concentrations of either calcium ions or sea water caused increased iron removal, but at …
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Hydrothermal carbonization of waste biomass
… the composting treatment applied to the organic fraction of municipal solid waste (MSW). In collaboration with Contarina S.p.A., a company that collects and treats MSW in the province of Treviso, in the North-East of Italy, this by-product was carbonized and tested both as a soil conditioner and …
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BACTERIAL PLAYERS IN CROP SYSTEMS: BENEFITS AND RISKS IN THE " ONE HEALTH" PERSPECTIVES.
… interesting results were observed using a residual fraction obtained from the extraction of proteins from okara, a soy-milk by-product, in comparison with other cryoprotectants. The second pillar of the present PhD thesis concern i) the investigation of the resistome profiling of …