Mitigating toxicity to permit bioremediation of constituents of nonaqueous-phase liquids

Article Abstract:

Nonaqueous-phase liquids (NAPLs) are pollutants widespread in aquatic environments. The success of efforts to decontaminate sites polluted by NAPLs has been restricted because many NAPLs are toxic to microorganisms. Using phenanthrene as a test compound, a new technique to improve bioremediation of toxic NAPLs has been developed. The technique involves dissolving phenanthrene in toxic NAPLs before dissolving it in a three-phase system. The results suggest that this approach leads to the extensive degradation of phenanthrene.

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Strategy using bioreactors and specially selected microorganisms for bioremediation of groundwater contaminated with creosote and pentachlorophenol

Article Abstract:

The enhancement of the effectiveness of bioremediation technologies for treating creosote and pentachlorophenol contaminated groundwater by using specially selected microorganisms is discussed. Bench and pilot scale evaluations were conducted on the performance of the bioreactors on the basis mass balance evaluations of chemical analyses of bioreactor influent, effluent, residues, comparative biological toxicity and tetratogenicity measurements. The capability and potential of bioreactor technologies were demonstrated.

Analysis, Usage, Aquatic microbiology, Water, Underground, Groundwater, Bioreactors, Pentachlorophenol, Creosote

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How toxic are toxic chemicals in soil?

Article Abstract:

The sequestration of toxic chemicals that persist in soil reduce both their extractability and availability to microorganisms. Termed as aging, the process has a great impact on assessing the toxicity of soil. A modified approach for assessing the risk associated with polluted soils is needed to establish better methods of remediation.

Research, Hazardous substances, Hazardous substances risk assessment, Soil disinfection, Toxicity testing, Toxicity tests, Sequestration (Chemistry)

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