Effect of Trona on the Leaching of Trace Elements from Coal Fly Ash.

摘要

Fly ashes were sampled from the ESPs by on-site contractors during air emission control tests. The injection tests were short-term, lasting approximately three hours per test condition. EPRI received three batches of samples since November 2011, representing baseline conditions and selected injection conditions. The sample information are listed in respective tables. EPRI analyzed the samples for total composition and leaching characteristics. Results presented here are believed to be representative of broad trends, but should used with caution due to some difficulties with sampling and analysis. In addition, as noted above these were short term injection tests, and obtaining discrete ash samples to represent a particular test condition was challenging. Finally, due to the small sample sizes for some samples, we were unable to perform all analyses, and in some cases complete QA/QC was not possible. That said, the general results appear to be reasonable for drawing broad inferences.