Title of Document: EVALUATION OF LEACHING PROTOCOLS FOR THE TESTING OF COAL COMBUSTION BYPRODUCTS Jason Louis Becker, Master of Science, 2010 Directed By: Associate Professor Ahmet Aydilek, Department of Civil and Environmental Engineering Beneficial reuse of coal combustion byproducts requires an evaluation of metal leaching potential. Reuse of high carbon fly ash in highway embankment constru...

The leaching process of cobalt using a wide range experimental variables is described. treated samples were from the Kalumbwe Mine in south Democratic Republic Congo. In this study, predictive model recovery both Taguchi statistical method and an artificial neural network (ANN) algorithm was proposed. utilising L25 (55) orthogonal array ANN multi-layer, feed-forward, back-propagation learning a...

The EU FOCUS scenarios are a set of nine standard scenarios based on a combination of crop, soil and weather data used throughout Europe to evaluate the leaching potential of pesticides to groundwater. In Ireland, two predefined EU FOCUS scenarios (Okehampton and Hamburg) appear to be the most appropriate to Irish conditions. However, there is concern that these scenarios may not accurately rep...

Polymerised aluminium ferric sulphate (PAFS) was prepared from dross as a coagulant in wastewater treatment. The effects of leaching time, temperature, and sulfuric acid concentrations on the turbidity removal were investigated, optimum conditions determined using response surface methodology. results showed that PAFS preparation at time 60 minutes, temperature 65°C, concentration 1 mol/L. Furt...

Leaching characteristics of Cs from immobilized waste matrices in different cement-based grouts have been assessed to investigate the influence of the additives on the leaching behavior of the solid waste matrices. The International Atomic Energy’s Agency (IAEA) standard leach method has been employed to study the leach pattern of Cs radionuclide from the immobilized waste form. The examination...

In this paper, the extraction of vanadium from stone coal by roasting with MgO and leaching with sulfuric acid has been investigated, and the mechanism analysis of stone coal roasting with MgO was studied. The results indicated that under the conditions that the mass fraction of the particles with grain size of 0–0.074 mm in raw ore was 75%, the roasting temperature was 500 ◦C, the roasting tim...

Salinity of soil and water is the most important agricultural hazard in arid and semi-aridregions. In saline soils, yield production directly influences by soluble salts in the root zone aswell as by shallow water table depth. The first step for reclamation of such soils is reducingsalinity to optimum level by leaching. The objective of this study was to develop a practicalmodel to estimate wat...

In spite of the environmental and commercial interests in the bacterial leaching of pyrite, two central questions have not been answered after more than 35 years of research: does Thiobacillus ferrooxidans enhance the rate of leaching above that achieved by ferric sulfate solutions under the same conditions, and if so, how do the bacteria affect such an enhancement? Experimental conditions of p...