Journal article
The Role of Chemical-Weathering in the Neutralization of Acidic Deposition
Schweizerische Zeitschrift Fur Hydrologie-Swiss Journal of Hydrology, Vol.48(2), pp.171-195
1986
DOI: 10.1007/BF02560197
Abstract
Chemical weathering of rocks and minerals is a key factor which mitigates acidic deposition and affects water chemistry. It supplies cations and alkalinity to the surface water, groundwater, ion-exchange complex, and vegetation in the watershed. The kinetics of chemical weathering have not been determined in the field, but based on laboratory experiments, the rate of weathering has a fractional order dependency on hydrogen ion and organic ligand concentration in bulk solution. Watersheds with the greatest degree of hydrologic and geologic sensitivity can produce only 200–500 eq/ha·yr of cations or alkalinity for export. This is equivalent to 100 cm/yr of precipitation with a pH of 4.3–4.6 or an annual sulfur deposition of 1.0–2.5 g S/m2·yr. When acid and sulfur deposition are greater than these levels, extremely sensitive lakes may become acidified. To illustrate this point, a simple steady-state model is applied to lakes in regions where acidification of lakes has been reported.
Details
- Title: Subtitle
- The Role of Chemical-Weathering in the Neutralization of Acidic Deposition
- Creators
- Jerald L. Schnoor - University of IowaWerner Stumm
- Resource Type
- Journal article
- Publication Details
- Schweizerische Zeitschrift Fur Hydrologie-Swiss Journal of Hydrology, Vol.48(2), pp.171-195
- DOI
- 10.1007/BF02560197
- ISSN
- 0036-7842
- Language
- English
- Date published
- 1986
- Academic Unit
- Civil and Environmental Engineering; Occupational and Environmental Health
- Record Identifier
- 9983557505902771
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