The chemical responses of acidic Woods Lake, NY to two different treatments with calcium carbonate

Chad P. Gubala, Charles T. Driscoll

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

A study was conducted to compare and contrast two approaches to neutralize an acidic lake by CaCO3 addition (Woods Lake, Adirondack Mountains, New York, U.S.A.; 42°52′ N, 71°58′ W); direct water column treatment and treatment of both the water column and sediment. The latter treatment strategy was designed to release a slow, diffusive Ca2+. flux across the sediment/water interface and thereby delay the rate of reacidification. Both applications satisfactorily increased the acid neutralizing capacity (ANC) and Ca2+ of the lake, temporarily buffering the water column pH against acidic inputs from the watershed. The water column/sediment application involved a greater (50% more) dose in order to accomplish sediment treatment and resulted in a prolonged period of positive ANC in the water column. However, both treatments neutralized approximately the same quantity of runoff and equivalence of acidic inputs. Water column/sediment treatment may be an effective approach to help delay reacidification in shallow lakes of moderate hydraulic retention times. Unfortunately, many acidic Adirondack lakes have very short hydraulic retention times (<0.5 yr) and may not be neutralized for adequate durations by either water column or water column/sediment CaCO3 treatments.

Original languageEnglish (US)
Pages (from-to)7-22
Number of pages16
JournalWater, Air, and Soil Pollution
Volume59
Issue number1-2
DOIs
StatePublished - Sep 1 1991

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Ecological Modeling
  • Water Science and Technology
  • Pollution

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