: 7. Radioactive & thermal wastes
wastes and substances:
a. As we read in earlier notes, radon can be picked up by groundwater
flowing over parent rock and carried into local water supplies.
b. Mining and nuclear operations:
| Nuclear-waste found
to move with groundwater
studying the movement of groundwater have found that radioactive
contaminants can migrate over long distances faster than originally
thought. This finding has enormous implications for current and
future waste disposal facilities, according to the scientists who
have been conducting field tests at Oak Ridge National Laboratory
in Tennessee. Approximately 50 percent of all Americans get their
drinking water from groundwater sources, according to the US EPA.
MINE WASTE POLLUTING COLORADO RIVER: Water tests reveal that
"uranium mill waste" leaching into the Colorado River has made the
water radioactive at "one-third the level considered dangerous,"
says the San Diego Union Tribune 1/10. The mine's owner, Atlas Corporation,
has declared bankruptcy, leaving the bulk of the enormous clean
up costs to taxpayers. The huge pile of mine waste "sits 750 feet
from the river," and is leaking "an estimated 28,800 gallons of
radioactive pollution and toxic chemicals" into the river each day.
8. Thermal pollution:
First onsider that 1/2
of the US water not used for agriculture is used to cool electric power
Water which is 'warmed-up'
and then released into water bodies speeds up the metabolism of
most living organisms. As increased metabolism requires more oxygen
to sustain that level, thus animals living in such areas have a
greater need of available oxygen.
At the same
time, the warmer
the water the less dissolved oxygen the water can hold. As the energy
of dissolved gases increases with heating, the more likely the gases
are to move out of the water and into the atmosphere.
- Reduces plant life:
T increase of 12F within a mile of an electric plant; reduced
plankton life for a distance of 1-12 miles down stream.
Instead of thermal
'pollution' these waters could be used for therma. enrichment.
- In Japan, warm waters
are used to cultivate oysters, to extend the growing seasons of
crops, and for cogeneration ( heat used to heat buildings).
to introduction 1. Go to sediments
2. Go to inorganics 3.
Go to disease vectors 4. Go to plant
Got to organics 6. Go to Oxygen-demanding
wastes 7. Go to radioactive &