Stephanie Jones Published in Fuel Science Journal
Stephanie Jones (Maryland) co-authored an article entitled, "Evaluation of Waste Materials for Acid Mine Drainage Remediation" that was published in the journal Fuel: The Science and Technology of Fuel and Energy in Volume 188, Pages 294-309 on January 15, 2017.
The article summarizes laboratory scale tests that were conducted to assess the efficiency of two different types of waste materials to remediate acid mine drainage. The waste materials used in the study were recycled concrete aggregates (RCAs), and fly ashes. Four different RCA materials and three different fly ash materials were evaluated.
Stephanie has contributed to characterization, monitoring, and remedial action projects as related to the EPA's Final Rule for regulation of coal combustion residuals. She has also conducted research that utilized bacterial source tracking to model and predict the performance of watershed protection measures in Pennington County, South Dakota.
Stephanie's co-author was Bora Cetin.
AbstractLaboratory scale tests were conducted to assess the efficiency of two different types of waste materials to remediate acid mine drainage (AMD). The waste materials used in the current study were recycled concrete aggregates (RCAs), and fly ashes. Four different RCA materials and three different fly ash materials were evaluated. Column leach tests (CLTs) were conducted to determine the effects of the remediation materials on pH, electrical conductivity, alkalinity, oxidation reduction potential (Eh), and concentrations of sulfate (SO42−), chromium (Cr), iron (Fe), manganese (Mn), copper (Cu), and zinc (Zn) in AMD. Results of the CLTs suggest RCAs and one of the highly alkaline fly ash can effectively raise pH of the AMD and reduce concentrations of Cr, Cu, Fe, Mn, and Zn in AMD. In addition, sulfate concentrations of AMD decreased significantly after being treated by RCAs while sulfate concentrations of the AMD increased when it was remediated by fly ashes. It is speculated that leaching of sulfate from fly ash samples during treatment may decrease the metal sorption capacity of fly ashes. X-ray fluorescence spectroscopy quantified the impact of CaO and loos on ignition (LOI) in the remediation materials on sorption capacity of metals from the AMD. Sorption capacity for Cr, Cu, Fe, and Zn was found to be greater in materials with high CaO and LOI content, and low unburned carbon.
For more information regarding the article, visit: Fuel: The Science and Technology of Fuel and Energy
To learn more about Stephanie see her profile at: https://www.linkedin.com/in/stephanie-jones-3b6826112/