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Articles 211 - 217 of 217
Full-Text Articles in Engineering
Guidelines For Speed Reduction In Towns Along Rural Highways, Joseph Shrestha, A. Said, Y. Tian, Pramen P. Shrestha
Guidelines For Speed Reduction In Towns Along Rural Highways, Joseph Shrestha, A. Said, Y. Tian, Pramen P. Shrestha
Joseph Shrestha
No abstract provided.
Spatiotemporal Visualization Of Major Cost Items In Highway Construction In Iowa, Deepanshi Jain, Joseph Shrestha, J. David Jeong
Spatiotemporal Visualization Of Major Cost Items In Highway Construction In Iowa, Deepanshi Jain, Joseph Shrestha, J. David Jeong
Joseph Shrestha
No abstract provided.
Framework For Advanced Daily Work Report System, Joseph Shrestha, H. David Jeong, Douglas D. Gransberg
Framework For Advanced Daily Work Report System, Joseph Shrestha, H. David Jeong, Douglas D. Gransberg
Joseph Shrestha
No abstract provided.
Preconstruction Services Cost Estimating Guidebook, Douglas D. Gransberg, H. David Jeong, E. Craigie, J. Rueda, Joseph Shrestha
Preconstruction Services Cost Estimating Guidebook, Douglas D. Gransberg, H. David Jeong, E. Craigie, J. Rueda, Joseph Shrestha
Joseph Shrestha
No abstract provided.
Potential Of Metal Recovery From Coal Combustion Products. Part I. Physicochemical Characterization, Dariusz Bradlo, Witold Zukowski, Piotr Czuprynski, Konrad Jura
Potential Of Metal Recovery From Coal Combustion Products. Part I. Physicochemical Characterization, Dariusz Bradlo, Witold Zukowski, Piotr Czuprynski, Konrad Jura
Witold Zukowski
The paper presents physicochemical characteristic of coal combustion products: fly ashes from three stages of electrostatic dust collecting system (FAI, FAII, FAIII), slag (S) and slurry from wet flue gas desulphurization (S-wFGD). Fly ashes are classifi ed as ‘siliceous’ or ‘sialic-high acid’. Th e concentrations of selected heavy metals indicate that their values increase in accordance with consecutive stages of dust collecting system. Fly ash FAIII and slurry from wet FGD have the largest heavy metals content. The results show the increment of lanthanides and ittrium (REY) contents in CCPs from slag, through FAII and FAI to S-wFGD and FAIII.
Potential Of Metal Recovery From Coal Combustion Products. Part Ii. Leaching Of Selected Elements, Dariusz Bradlo, Witold Zukowski, Piotr Czuprynski, Karol Witkowski
Potential Of Metal Recovery From Coal Combustion Products. Part Ii. Leaching Of Selected Elements, Dariusz Bradlo, Witold Zukowski, Piotr Czuprynski, Karol Witkowski
Witold Zukowski
The paper presents leaching results of coal combustion products: fly ashes from the three stages of dust collecting system, slag and slurry from wet fl ue gas desulphurization. The static leaching method was used at room temperature, at a pH value of 1, 4, 7, 10 and 13 for 10 days. H2SO4 and NaOH were added as extraction media and L/S ratio was set to the value of 10. The highest recovery ratio was attained during leaching at a pH value of 1 for fly ash from the third stage of dust collecting system and slurry.
Peat And Coconut Fiber As Biofilters For Chromium Adsorption From Contaminated Wastewaters, Henryk Koloczek, Jaroslaw Chwastowski, Witold Zukowski
Peat And Coconut Fiber As Biofilters For Chromium Adsorption From Contaminated Wastewaters, Henryk Koloczek, Jaroslaw Chwastowski, Witold Zukowski
Witold Zukowski
Batch adsorption experiments were performed for the removal of chromium (III) and chromium (VI) ions from aqueous solutions using Canadian peat and coconut fiber. The Langmuir model was used to describe the adsorption isotherm. The maximum adsorption for peat reached 18.75 mg/g for Cr(III) and 8.02 mg/g for Cr(VI), whereas the value for fiber was slightly higher and reached 19.21 mg/g for Cr(III) and 9.54 mg/g for Cr(VI). Both chromium forms could be easily eluted from the materials. The adsorption of chromium forms to organic matter could be explained in terms of formation of donor-acceptor chemical covalent bound with hydroxyl …