"Natural" remediation of DDT, PCB debated: the dispute over chlorinated contaminant cleanups is heating up amid claims about benefits of natural processes

Article Abstract:

The Michigan State University research that showed benthic bacteria degrading DDT has thrown many Superfund cleanup projects off track, mainly due to the insistence of many liable firms regarding the potential of the research to open up natural remediation strategies which frees them from liability. The Michigan State research showed DDE, a toxic byproduct of DDT being degraded to DDMU, which is subject to further reductive dechlorination. Firms held liable for DDT and PCB contamination point to the research in their claims that the release of such substances in the environment should continue. Federal scientist debunk such claims, noting that if the activity of benthic bacteria in degrading such substances were significant, then these pollutants which have been around for 20 years should have shown lesser concentration.

Political aspects, Microbiological synthesis, Toxic torts, Superfund

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Fate of nitrogen in nitrogen-containing compounds during cocurrent flow gasification (ChemChar process)

Article Abstract:

The ChemChar cocurrent flow gasification process provides an alternative to other thermal treatment processes for destroying nitrogen-containing wastes that avoids the production and release of harmful NOx emissions. A research showed that treatment of nitrogen-containing wastes in the reducing environment of the process resulted only into combustible gases, condensable water vapor, and a non-reactive carbon and mineral solid.

Research and Development in the Physical, Engineering, and Life Sciences, Industrial Gas Manufacturing, Industrial gases, Air Pollution Control R&D, Nitrogen, Solid Waste Control R&D, Air pollution control, Nitrogen (Chemical element), Air pollution research, Pollution control research, Air quality management, Solid wastes

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Recycling of hazardous solid waste material using high-temperature solar process heat. 1. Thermodynamic analysis

Article Abstract:

A research report examines the use of solar process heat in the recycling of electric arc furnace dust and automobile shredder residue, both containing heavy metal oxides.

United States, Manufacturing processes, Statistical Data Included, Production management, Usage, Illustration, Hazardous waste management industry, Heavy metals, Solar heating

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