HOW BROWN WATERS ARE INFLUENCED BY ACIDIFICATION - THE HUMEX LAKE CASE-STUDY

被引:10
作者
CLAIR, TA
POLLOCK, TL
COLLINS, PV
KRAMER, JR
机构
[1] Monitoring and Evaluation Branch, Conservation and Protection Service-Atlantic Region, Environment Canada, Moncton, NB E1E 1E1
[2] Department of Geology, McMaster University, Hamilton
基金
加拿大自然科学与工程研究理事会;
关键词
D O I
10.1016/0160-4120(92)90026-Z
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In order to assess how brown waters will react with changes in acid inputs caused by acid precipitation, it is important to estimate quantitatively the concentration of organic anions in solution. A new method of determining the organic anion component of brown waters was developed. The approach was then tested on water samples collected in Nova Scotia. The method shows that, with a knowledge of pH, acid neutralization capacity (ANC), and dissolved inorganic carbon (DIC), a titration curve which estimates the change in organic anion concentration and its relationship to changes in ANC can be produced. This method was applied to the waters of Sjervatjern. Preliminary results based on estimated data suggest that because of the already low pH values of the Norwegian lake water, organic acids will not offer much neutralization capacity to inputs of mineral acids.
引用
收藏
页码:589 / 596
页数:8
相关论文
共 11 条
  • [1] Clair, Diagenesis and transformation of aquatic dissolved organic matter in Nova Scotia freshwaters, Ph.D. thesis, (1991)
  • [2] Clair, Barlocher, Brassard, Kramer, Chemical and microbial diagenesis of humic matter in freshwaters, Water, Air, Soil Pollut., 46, pp. 205-211, (1989)
  • [3] Clair, Devarennes, Howell, Chemistry trends in Atlantic Canada Lakes, Tech. Rep. IWD-AR-WQB-91-174, (1992)
  • [4] Driscoll, Fuller, Schecher, The role of organic acids in the acidification of surface waters in the eastern U.S., Water, Air, Soil Pollut., 43, pp. 21-40, (1989)
  • [5] Environment Canada, NAQUADAT dictionary of parameter codes, (1984)
  • [6] Freedman, Clair, Ion mass balances and seasonal fluxes from four acidic brownwater streams, Can. J. Fish. Aquat. Sci., 44, pp. 538-548, (1987)
  • [7] Henriksen, A simple approach for identifying and measuring acidification of freshwater, Nature, 278, pp. 542-545, (1979)
  • [8] Oliver, Thurman, Malcolm, The contribution of humic substances to the acidity of coloured natural waters, Geochim. Cosmochim. Acta, 47, pp. 2031-2035, (1987)
  • [9] Stumm, Morgan, Aquatic chemistry, (1981)
  • [10] Thompson, The cation denudation rate as a quantitative index of sensitivity of eastern Canadian rivers to acidic precipitation, Water, Air, and Soil Pollution, 18, pp. 215-226, (1992)