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Remediation and Restoration |
Soil
washing
Thermal desorption
Composting
Electrochemical separation
Supercritical water oxidation
Recovery of spilled oil |
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Description
Remediation technologies render hazardous
substances less harmful after they have entered the environment, and restoration
technologies renew and renovate ecosystems which have been damaged or changed, especially
those which have declined due to anthropogenic effects. Together these technologies seek
to redress existing environmental problems, and thus are especially important in the near
term, that is, over the next ten to twenty years.
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Special Characteristics
The current state of the art in remediation
technology is unlikely to meet fully even basic requirements for remediating difficult
contamination problems, much less to meet goals for achieving remediation in a cost
effective and timely manner. Early "treatment" methods such as dig-and- store or
incineration tend to be high-cost and to carry risks for further contamination. Some
recently developed innovative technologies have found growing application. A report by
EPA's Technology Innovation Office[1] estimates that soil vapor extraction techniques,
first deployed in the early 1980s, now account for 40 percent of innovative applications.
Bioremediation techniques account for 21 percent. Other innovative techniques currently
being applied include thermal desorption, soil washing, and in-situ flushing. However,
more development is still required, especially for nuclear materials, for other less
common contaminants, for heterogeneous and often poorly characterized mixtures of
contaminants, and for more difficult media.
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Impact on Economy
A varied and comprehensive portfolio of
remediation and restoration technologies will be needed to play a critical and rather
unique dual role in the U.S. economy. This dual role derives from the dichotomy that,
although remediation of sites within the United States will be a significant cost to the
U.S. economy, the opportunities to remediate sites outside the United States will
represent a large potential export market which may benefit the U.S. economy. Thus
development of timely and cost-effective remediation and restoration technologies is
critical, not only to reduce costs to the U.S. economy for addressing indigenous
contamination problems, but to promote U.S. competitiveness in global remediation markets.
These technologies can contribute to job creation and economic growth, both by creating
new jobs, and by helping reduce clean-up cost liabilities faced by many manufacturers.
They also contribute to the health of the U.S. population by reducing risks associated
with contaminants in the environment.
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Impact on Security
Under development.
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Worldview
There is general parity between the United
States and Europe in bioremediation technology. The United States has conducted more basic
research in this area, but Europe has successfully used U.S. technology for relatively
large-scale, on-site remediation efforts. A European company was the first to use a fungi
to bioremediate 10,000 tons of soil at a wood processing plant. While Japanese firms are
capable of being major players in bioremediation technology, they appear to lag slightly
in actual demonstration of this capability. Their strength is believed to lie in ex
situ bioremediation, where large-scale bioreactor and bioprocessing facilities will be
required.
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Whats the use?
Under development. |
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Return to
ENVIRONMENTAL QUALITY |
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