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Your Environment. Your Health.

Research Briefs by Year: 2019

Superfund Research Program

  • 293 - Study Sheds Light on Breakdown of PCBs to Potentially Harmful Metabolites in Humans -- Lehmler
    Release Date: 05/01/2019

    New research out of the University of Iowa Superfund Research Program (SRP) Center identified specific cytochrome P450 (CYP) enzymes and underlying mechanisms involved in the breakdown, or metabolism, of polychlorinated biphenyls (PCBs) into compounds that may be more toxic.

  • 292 - Nitrous Oxide Halts Breakdown of Chlorinated Compounds -- Loeffler
    Release Date: 04/03/2019

    A new Superfund Research Program (SRP) study showed that nitrous oxide (N2O), a groundwater contaminant commonly generated from agricultural runoff, inhibits bacterial degradation of certain chlorinated contaminants, including tetrachloroethene (PCE). The study may explain why bioremediation, or the use of bacteria to break down compounds, can stall at some hazardous waste sites.

  • 291 - Passive Samplers Tackle PCB Flux -- Hornbuckle
    Release Date: 03/06/2019

    Researchers from the University of Iowa Superfund Research Program (SRP) Center have developed a method to measure the movement, or flux, of polychlorinated biphenyls (PCBs) from water to air using passive sampling devices.

  • 290 - Promising Membrane Technology Reduces Chlorobenzene in Groundwater -- Alshawabkeh, Bhattacharyya
    Release Date: 02/13/2019

    A new Superfund Research Program collaboration has developed a promising groundwater cleanup technology that provides an efficient, low-maintenance method of removing chlorobenzene and other compounds from water. The method integrates electrochemical oxidation, which uses electricity to transform contaminants into non-toxic substances, and membranes containing palladium (Pd), a metal used as a catalyst in many industrial chemical synthesis applications and groundwater treatment.

  • 289 - Study Sheds Light on Respiratory Toxicity of EPFRs -- Dugas, Cormier
    Release Date: 01/30/2019

    A new SRP study explains how particulate matter (PM) containing environmentally persistent free radicals (EPFRs) activate the aryl hydrocarbon receptor (AhR). AhR is known to play an important role in detecting and responding to a variety of pollutants. These findings could prove useful in understanding the underlying mechanism of diseases known to be associated with inhalation of PM, such as cardiovascular disease.

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