Tran X. Phuoc, Ping Wang, and Dustin McIntyre,...
URL: http://www.flyash.info/2015/005-tran-2015.pdf
Although coal ash has been identified as a potential source for rare earth production, it still remains as an untapped resource. This is because data on concentrations of trace rare earth elements in various coal ash wastes are not available. We will report here, therefore, our results on the use of laser-induced breakdown spectroscopy to analyze the rare earth elements contained in ash samples from power River Basin sub-bituminous coal (PRB-coal). The pulse intensity of about 14.5 GW/cm2 was used. Emission lines from the laser spark was analyzed using a spectrometer that can record a spectrum across the 200-980 nm range at a resolution of approximately 0.1 nm (FWHM). Ash was prepared by drying and burning PRB-coal powder of about 150 µm in a TGA at 750 degrees C. until the weight of the remaining ash became unchanged. The ash samples for LIBS experiments were made in the form of pellets by compressing about 1.5 grams of ash in a pellet die with a pressure Of 15000 psi for 5 minutes. We have identified many elements in the Lanthanide series (cerium, europium, holmium, lanthanum, lutetium, praseodymium, promethium, samarium, terbium, ytterbium) and some elements in the actinide series (actinium, thorium, uranium, plutonium, berkelium, californium) in the ash samples. In addition, various metals were also seen to present 'n the ash samples. Procedures for quantifying their concentrations were briefly presented.
Non è stata ancora creata alcuna vista per questa risorsa.
Informazioni supplementari
| Campo | Valore |
|---|---|
| Data last updated | 28 settembre 2015 |
| Metadata last updated | 25 novembre 2025 |
| Creato | 28 settembre 2015 |
| Formato | sconosciuto |
| Licenza | No License Restrictions |
| Categories json | [] |
| Datastore active | False |
| Folder id | root |
| Has views | False |
| Id | c5c240e5-fd06-4a0d-b995-3407630c43af |
| License type | No License Restrictions |
| Locations json | [] |
| Package id | 1ea0b312-5460-4efa-b1cd-04d71a50f9f1 |
| Position | 2 |
| Recycle removed | False |
| Resource group id | 76c8c2f3-cbf1-4a8c-85c3-301dd6013067 |
| Resource type | file |
| State | active |
| Webstore last updated | None |
| Webstore url | None |