Little Simon Pond, a moderately acidic lake located in the Adirondack region of New york State, was treated during August 1986 by application of three particle sizes of limestone (CaCO3), ranging from finely ground (14 μm) to coarsely ground (40 μm). Immediately after base addition, there was a marked increase in pH, acid neutralizing capacity (ANC), and Ca2+ associated with the dissolution of CaCO3. Water quality targets (pH greater than 6.5, ANC greater than 100 μeq/L) were immediately met in the epilimnion, and approximately 2 months after treatment were attained in the hypolimnion. This delayed response in the lower waters was due, in part, to restricted water-column mixing as a result of thermal stratification both prior to and following the treatment. Short-term reacidification occurred during the snowmelt period and was limited to the upper waters after 1 year of treatment. Results show that application of multiple limestone particle sizes may be a useful method for mitigating acidification in thermally stratified lakes like Little Simon Pond.
|Original language||English (US)|
|Number of pages||12|
|Journal||Research Journal of the Water Pollution Control Federation|
|State||Published - Dec 1 1989|
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