Matches in SemOpenAlex for { <https://semopenalex.org/work/W2468778310> ?p ?o ?g. }
Showing items 1 to 77 of
77
with 100 items per page.
- W2468778310 abstract "Clean Coal Technology (CCT) ash may contain trace elements such as arsenic (As), cadmium (Cd) and selenium (Se), some of which may become mobile and leach from a disposal facility. This study was undertaken to determine the effects of a carbon dioxide (CO{sub 2}) pressure treatment on the leachability of trace elements in CCT ash. The CO{sub 2} pressure treatment was optimized using a three by five factorial design as well as a multiple regression analysis. Low, medium and high levels of moisture, reaction time, pressure, temperature and concentration of CO{sub 2} were tested. Treated and untreated CCT ash samples were subjected to X-ray diffraction (XRD) and leachability studies. A 1:4 (solid:solution) suspension was used to monitor the pH changes after each treatment. Optimum CO{sub 2} treatment conditions rapidly precipitated calcite, and thus lowered the pH of CCT ash samples. For example, a stable pH drop from 12.47 to 7.05 for CCT-1, 12.74 to 9.34 for CCT-2 and 11.50 to 9.16 for CCT-3 was obtained. An increase in percent calcium carbonate (CaCO{sub 3}) content and percent CO{sub 2} uptake was observed in CO{sub 2} treated samples. Solubility studies suggested that Ca{sup 2+} concentration in CO{sub 2} treated CCT ash leachatesmore » appeared to be regulated by CaCO{sub 3}. Our results show that reacting moist CCT ash samples with CO{sub 2} under pressure is effective in lowering the concentrations of leachable trace elements (e.g., Cd, Pb, Cr, As and Se), which could prevent their migration from disposal environments into soils and groundwaters.« less" @default.
- W2468778310 created "2016-07-22" @default.
- W2468778310 creator A5000710376 @default.
- W2468778310 creator A5008491100 @default.
- W2468778310 creator A5023867527 @default.
- W2468778310 creator A5079682345 @default.
- W2468778310 date "1995-06-01" @default.
- W2468778310 modified "2023-09-27" @default.
- W2468778310 title "Development of a carbon dioxide pressure technique for chemical stabilization of alkaline clean coal technology (CCT) ash. Final report" @default.
- W2468778310 hasPublicationYear "1995" @default.
- W2468778310 type Work @default.
- W2468778310 sameAs 2468778310 @default.
- W2468778310 citedByCount "0" @default.
- W2468778310 crossrefType "journal-article" @default.
- W2468778310 hasAuthorship W2468778310A5000710376 @default.
- W2468778310 hasAuthorship W2468778310A5008491100 @default.
- W2468778310 hasAuthorship W2468778310A5023867527 @default.
- W2468778310 hasAuthorship W2468778310A5079682345 @default.
- W2468778310 hasConcept C107872376 @default.
- W2468778310 hasConcept C13965031 @default.
- W2468778310 hasConcept C155574463 @default.
- W2468778310 hasConcept C175944049 @default.
- W2468778310 hasConcept C178790620 @default.
- W2468778310 hasConcept C185592680 @default.
- W2468778310 hasConcept C199289684 @default.
- W2468778310 hasConcept C2780191791 @default.
- W2468778310 hasConcept C2780659211 @default.
- W2468778310 hasConcept C45812177 @default.
- W2468778310 hasConcept C502230775 @default.
- W2468778310 hasConcept C518851703 @default.
- W2468778310 hasConcept C530467964 @default.
- W2468778310 hasConcept C544657597 @default.
- W2468778310 hasConcept C67754453 @default.
- W2468778310 hasConcept C87343466 @default.
- W2468778310 hasConceptScore W2468778310C107872376 @default.
- W2468778310 hasConceptScore W2468778310C13965031 @default.
- W2468778310 hasConceptScore W2468778310C155574463 @default.
- W2468778310 hasConceptScore W2468778310C175944049 @default.
- W2468778310 hasConceptScore W2468778310C178790620 @default.
- W2468778310 hasConceptScore W2468778310C185592680 @default.
- W2468778310 hasConceptScore W2468778310C199289684 @default.
- W2468778310 hasConceptScore W2468778310C2780191791 @default.
- W2468778310 hasConceptScore W2468778310C2780659211 @default.
- W2468778310 hasConceptScore W2468778310C45812177 @default.
- W2468778310 hasConceptScore W2468778310C502230775 @default.
- W2468778310 hasConceptScore W2468778310C518851703 @default.
- W2468778310 hasConceptScore W2468778310C530467964 @default.
- W2468778310 hasConceptScore W2468778310C544657597 @default.
- W2468778310 hasConceptScore W2468778310C67754453 @default.
- W2468778310 hasConceptScore W2468778310C87343466 @default.
- W2468778310 hasLocation W24687783101 @default.
- W2468778310 hasOpenAccess W2468778310 @default.
- W2468778310 hasPrimaryLocation W24687783101 @default.
- W2468778310 hasRelatedWork W1488407932 @default.
- W2468778310 hasRelatedWork W1494306203 @default.
- W2468778310 hasRelatedWork W1501693962 @default.
- W2468778310 hasRelatedWork W170642524 @default.
- W2468778310 hasRelatedWork W1995903296 @default.
- W2468778310 hasRelatedWork W201728373 @default.
- W2468778310 hasRelatedWork W2028671154 @default.
- W2468778310 hasRelatedWork W2038306511 @default.
- W2468778310 hasRelatedWork W2039802826 @default.
- W2468778310 hasRelatedWork W2096684012 @default.
- W2468778310 hasRelatedWork W2181700245 @default.
- W2468778310 hasRelatedWork W2323831033 @default.
- W2468778310 hasRelatedWork W2502499183 @default.
- W2468778310 hasRelatedWork W2593044754 @default.
- W2468778310 hasRelatedWork W278631629 @default.
- W2468778310 hasRelatedWork W2804588414 @default.
- W2468778310 hasRelatedWork W3020854465 @default.
- W2468778310 hasRelatedWork W348097759 @default.
- W2468778310 hasRelatedWork W42623857 @default.
- W2468778310 hasRelatedWork W2188962038 @default.
- W2468778310 isParatext "false" @default.
- W2468778310 isRetracted "false" @default.
- W2468778310 magId "2468778310" @default.
- W2468778310 workType "article" @default.