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Basic concepts on heavy metal soil
bioremediation The
utilization of organisms, primarily microbes, to clean up contaminated soils, aquifers,
sludges, residues, and air, known as “bioremediation”, is a rapidly changing and
expanding area of environmental biotechnology, that offers a potentially more effective
and economical clean-up technique than conventional physicochemical methods. Although it
is certain that up to now the technologies employed are not technically complex,
considerable experience and expertise is required to design and implement a successful
bioremediation program. As a matter of fact, and since bioremediation frequently addresses
multiphasic, heterogenous environments (i.e., soils), successful bioremediation is
dependent on an interdisciplinary approach involving such disciplines as microbiology,
engineering, ecology, geology, and chemistry. The bio-enthusiasm of the early years that
followed the initial promising research results and inspired the creation of many
remediation companies has ended in a more realistic and sometimes even sceptical view of
bioremediation since it has now become clear that results obtained in the laboratory do
not necessarily indicate what may happen actually in the field, since it is not possible
to simulate all the changing conditions of a real situation. |
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