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Influence of Water Chemistry on Suspended Solids in Coal-Mine Sedimentation Ponds

Agronomy Dep., Univ. of Kentucky, Lexington, KY 40546-0914.

^* Corresponding author.

ABSTRACT

In Kentucky, water quality in coal-mine sedimentation ponds is lowered by high concentrations of suspended solids. Spoil samples from surface mine sites in eastern and western Kentucky were equilibrated with distilled water to evaluate their effects on suspended solids. The results demonstrate that small changes in salt concentration have large effects on suspended solid concentration. Furthermore, it was determined that for the ranges of water chemistry encountered in such environments, there is a linear relationship between the repulsive index [RI = (0.014 EC)^–1/2] and suspended solids. Increasing the electrical conductivity (EC) reduces RI and increases the rate of settling.

Contribution from the Dep. of Agronomy, Univ. of Kentucky Agric. Exp. Stn. Journal no. 89-3-98.

Received for publication April 3, 1989.