Limestone Barriers to Neutralize Acidic Streams

by Frank H. Pearson, (A.M.ASCE), Research Asst.; Land and Water Research Inst., Pennsylvania State Univ., University Park, Pa.,
Archie J. McDonnell, (A.M.ASCE), Prof. of Civ. Engrg. and Dir.; Water Center, Land and Water Research Inst., Pennsylvania State Univ., University Park, Pa.,


Serial Information: Journal of the Environmental Engineering Division, 1975, Vol. 101, Issue 3, Pg. 425-440


Document Type: Journal Paper

Errata: (See full record)

Abstract: Water samples were taken for analysis and measurements were made to determine the effect of each installation on water quality at four prototype limestone barriers that had been constructed to neutralize acidic streams. The pH of stream water was increased by up to 3 pH units at low streamflow, to pH 7 or above. This demonstrates that limestone barriers are capable of renovating acidic streams to the point that normal aquatic life can be restored, rendering the stream water suitable for a number of uses that are otherwise precluded. A mathematical model of limestone barriers was constructed, based on hydraulic laws and on the chemical kinetics of the rate limiting reactions between crushed limestone and acidic water. Model predictions matched the observed performance of the barriers. A procedure was developed to determine the design of a barrier of crushed limestone to neutralize a given streamflow.

Subject Headings: Limestone | Rivers and streams | Water quality | Acids | pH | Ecological restoration | Water sampling | Water management

Services: Buy this book/Buy this article

 

Return to search