Loading...
Please wait, while we are loading the content...
Similar Documents
Leachability of Arsenic and Selenium in Submicron Coal Fly Ash
| Content Provider | Semantic Scholar |
|---|---|
| Author | Seshadri, Prasanna Sisk, Dennis Bowman, Frank O. Benson, Steve Seames, Wayne |
| Copyright Year | 2011 |
| Abstract | The leaching of arsenic (As) and selenium (Se) from coal combustion fly ash for the submicron particle size range was assessed using a modified Toxicity Characteristic Leaching Procedure (TCLP) protocol. Size segregated fly ash samples were collected from the combustion of Powder River Basin (PRB) subbituminous coal at 1723 K and 1838 K. These ash samples were leached under acidic, neutral and basic pH conditions. Qualitative data on the solubility of As and Se for each pH environment were determined as a function of combustion temperature for submicron particle sizes. For both temperature samples, arsenic showed slight to moderate mobility under acidic conditions and was not mobile in basic and neutral mediums. Selenium, on the other hand, was found in the 1723 K samples to be highly soluble in an acidic medium but mobility decreased as the pH increased towards basic conditions. And in samples from the 1838 K run Se was found to be highly soluble under all three pH conditions. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.flyash.info/2011/143-Seshadri-2011.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |