More recently natural attenuation has been proposed for chlorinated solvents nitroaromatics heavy metals radionuclides and other contaminants for which the scientific understanding and field experience are much less robust groundwater remediation by natural attenuation is controversial. In the past decade officials responsible for clean up of contaminated groundwater have increasingly turned to natural attenuation essentially allowing naturally occurring processes to reduce the toxic potential of contaminants versus engineered solutions. Natural attenuation relies on natural processes to clean up or attenuate pollution in soil and groundwater natural attenuation occurs at most polluted sites however the right conditions must exist underground to clean sites properly if not cleanup will not be quick enough or complete enough. Learn natural attenuation of groundwater contaminants new paradigms technologies and applications from rice university cleaning up the large number of groundwater contamination sites is a significant and complex environmental challenge the . On march 1 2000 the national research council released a new report titled natural attenuation for groundwater remediationthis is the final report of a committee commissioned in 1997 to assess current knowledge on cleanup of contaminated sites by natural processes to define limitations of natural attenuation and steps needed to document its suitability at contaminated sites and to
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