Dispersion Modeling of Leachates from Thermal Power Plants
Publication: Journal of Environmental Engineering
Volume 133, Issue 12
Abstract
Ground and surface water contamination due to leaching of trace elements from ash ponds is a major environmental challenge for thermal power plants. Leaching of trace elements from the ash ponds indicated significant concentration of nine trace elements (Na, K, Mg, Ca, Fe, Pb, Mn, Cu, and Zn) in the leachates of various thermal power plants. The empirical models developed for the prediction of various trace elements i.e., Mn, Cu, Fe, Zn, and Pb, followed first-order reaction rate kinetics. The empirical models derived from the laboratory scale models were subsequently modified to account for the changes in the chemistry, mineralogy, and morphology of fly ash with respect to time which correlated well with the real field data with regression coefficients varying from 0.93 to 0.98. The modified empirical models predicted concentrations of the trace elements within of the observed values for four thermal power plants with standard deviation varying from 0.001 to 0.032.
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Information
Published In
Journal of Environmental Engineering
Volume 133 • Issue 12 • December 2007
Pages: 1088 - 1097
Copyright
© 2007 ASCE.
History
Received: Feb 8, 2006
Accepted: May 25, 2007
Published online: Dec 1, 2007
Published in print: Dec 2007
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