Theoretical technique for predicting the cumulative impact of iron and manganese oxidation in streams receiving discharge from coal mines
Book
·
OSTI ID:6682301
Two US Geological Survey computer programs are modified and linked to predict the cumulative impact of iron and manganese oxidation in coal-mine discharge water on the dissolved chemical quality of a receiving stream. The coupled programs calculate the changes in dissolved iron, dissolved manganese, and dissolved oxygen concentrations; alkalinity; and, pH of surface water downstream from the point of discharge. First, the one-dimensional, stead-state stream, water quality program uses a dissolved oxygen model to calculate the changes in concentration of elements as a function of the chemical reaction rates and time-of-travel. Second, a program (PHREEQE) combining pH, reduction-oxidation potential, and equilibrium equations uses an aqueous-ion association model to determine the saturation indices and to calculate pH; it then mixes the discharge with a receiving stream. The cumulative impact of representative discharges from several coal mines on stream quality in a small watershed in southwestern Indiana was simulated to illustrate the operation of the technique and to determine its sensitivity to changes in physical, chemical, and kinetic parameters. Results of the simulations indicated the following cumulative impact on the receiving stream from five discharges as compared with the effect from one discharge: 0.30 unit decrease in pH, 1.82 mg/L increase in dissolved iron, 1.50 mg/L increase in dissolved manganese, and 0.234 mg/L decrease in dissolved oxygen concentration. 37 refs., 8 figs., 4 tabs.
- OSTI ID:
- 6682301
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
010900* -- Coal
Lignite
& Peat-- Environmental Aspects
54 ENVIRONMENTAL SCIENCES
540320 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
COAL MINING
COMPUTER CODES
ECOLOGICAL CONCENTRATION
ELEMENTS
ENVIRONMENTAL IMPACTS
FEDERAL REGION V
INDIANA
IRON
MANGANESE
METALS
MINING
MONITORING
NORTH AMERICA
P CODES
PH VALUE
POLLUTION
STEADY-STATE CONDITIONS
TRANSITION ELEMENTS
USA
WATER POLLUTION
WATERSHEDS
010900* -- Coal
Lignite
& Peat-- Environmental Aspects
54 ENVIRONMENTAL SCIENCES
540320 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
COAL MINING
COMPUTER CODES
ECOLOGICAL CONCENTRATION
ELEMENTS
ENVIRONMENTAL IMPACTS
FEDERAL REGION V
INDIANA
IRON
MANGANESE
METALS
MINING
MONITORING
NORTH AMERICA
P CODES
PH VALUE
POLLUTION
STEADY-STATE CONDITIONS
TRANSITION ELEMENTS
USA
WATER POLLUTION
WATERSHEDS