Feb 15, 2005

Redox Potential

pH, LS (liquid-to-solid) ratio, temperature and of course fly ash composition are the most important parameters affecting leachability of trace elements from coal fired fly ash. How about redox potential? I believe Eh (or pE) may influence the stability of trace elements in fly ash. However, pH and Eh are related together. On the other hand, decreasing pH leads to increasing Eh. So how can I measure effects of Eh on mobility of trace elements from my fly ash samples in constant pH! How can I keep pH constant and change Eh?