Fe(o)-based bioremediation of aquifers contaminated with mixed wastes
First Claim
1. A device comprising a composition comprising one or more autotrophic hydrogenotrophic bacteria in culture medium comprising zero-valent iron, wherein said device is comprised within a water-, wastewater- or sewage-treatment system or a system for remediating pollution in an aqueous solution or an environmental site.
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Abstract
Disclosed are methods, devices and apparatus for bioremediation of mixed waste aquifers, based on a synergistic combination of reductive treatment using zero-valent iron and anaerobic biotransformations. Also disclosed are methods for in situ and ex situ remediation of groundwater and wastewater via these iron-bacterial compositions in a variety of devices including batch reactors, permeable and semipermeable reactive barriers, flow-through reactors, fluidized bed reactors, and sediment tanks.
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Citations
41 Claims
- 1. A device comprising a composition comprising one or more autotrophic hydrogenotrophic bacteria in culture medium comprising zero-valent iron, wherein said device is comprised within a water-, wastewater- or sewage-treatment system or a system for remediating pollution in an aqueous solution or an environmental site.
- 15. A device comprising a composition comprising one or more autotrophic hydrogenotrophic bacteria in culture medium comprising zero-valent iron, said device being comprised within an environmental site.
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19. A method of removing or reducing the concentration of an organic or inorganic compound in an environmental site, comprising providing to said site an effective amount of a composition comprising one or more hydrogenotrophic bacteria and zero-valent iron, or contacting said site with a device comprising a composition comprising culture medium comprising one or more hydrogenotrophic bacteria and zero-valent iron.
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20. A method for denitrifying groundwater or an environmental site in situ comprising contacting said groundwater or said environmental site with a composition comprising zero-valent iron and a culture of one or more hydrogenotrophic bacteria, or contacting said site with a device comprising a composition comprising zero-valent iron and a culture of one or more hydrogenotrophic bacteria.
- 21. A method for removing or reducing the concentration of a nitrogen- or sulfur-containing compound in a sample, comprising contacting a sample suspected of containing said compound with a composition comprising zero-valent iron and a culture of one or more hydrogenotrophic bacteria, or contacting said site with a device comprising a composition comprising zero-valent iron and a culture of one or more hydrogenotrophic bacteria.
- 23. A method for removing or reducing the concentration of a halocarbon compound in a sample, comprising contacting a sample suspected of containing said halocarbon with a composition comprising one or more autotrophic hydrogenotrophic bacteria and zero-valent iron, or contacting said sample with a device comprising a composition comprising culture medium comprising one or more autotrophic hydrogenotrophic bacteria and zero-valent iron.
- 27. A method for removing or reducing the concentration of a haloaromatic compound in a sample, comprising contacting a sample suspected of containing said haloaromatic compound with a composition comprising zero-valent iron and a culture of one or more hydrogenotrophic bacteria, or contacting said sample with a device comprising a composition comprising zero-valent iron and a culture of one or more hydrogenotrophic bacteria.
- 29. A method for degrading or detoxifying a pesticide, comprising contacting a sample suspected of containing said pesticide with a composition comprising zero-valent iron and a culture of one or more hydrogenotrophic bacteria, or contacting said sample with a device comprising a composition comprising zero-valent iron and a culture of one or more hydrogenotrophic bacteria.
- 32. A method for detoxifying a metal ion-containing compound, comprising contacting a sample suspected of containing said compound with a composition comprising zero-valent iron and a culture of one or more hydrogenotrophic bacteria, or contacting said sample with a device comprising a composition comprising zero-valent iron and a culture of one or more hydrogenotrophic bacteria.
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35. A method for reducing the concentration of nitrite-, nitrate-, sulfite-, or sulfate-containing compound in an aqueous solution or environmental site, comprising (a) selecting an aqueous solution or an environmental site containing said compound;
- and (b) contacting said solution or site with a composition comprising zero-valent iron and a culture of one or more hydrogenotrophic bacteria, or contacting said solution or site with a device comprising a composition comprising zero-valent iron and a culture of one or more hydrogenotrophic bacteria.
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36. A method for reducing the concentration of a pesticide or organic pollutant in an aqueous solution or environmental site, comprising (a) selecting an aqueous solution or an environmental site containing said pesticide or pollutant;
- and (b) contacting said solution or site with a composition comprising zero-valent iron and a culture of one or more autotrophic hydrogenotrophic bacteria, or contacting said solution or site with a device comprising a composition comprising zero-valent iron and a culture of one or more autotrophic hydrogenotrophic bacteria.
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37. A method for reducing the concentration of a mercury-, silver-, technetium-, strontium-, cesium-, chromium- or uranium-containing pollutant in an aqueous solution or environmental site, comprising (a) selecting an aqueous solution or an environmental site containing said pollutant;
- and (b) contacting said solution or site with a composition comprising zero-valent iron and a culture of one or more hydrogenotrophic bacteria, or contacting said solution or site with a device comprising a composition comprising zero-valent iron and a culture of one or more hydrogenotrophic bacteria.
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38. A method for reducing silver (I), mercury (II), technetium (VII), strontium (II), cesium (I), chromium (VI) or uranium (VI) ions in an aqueous solution, comprising contacting an aqueous solution suspected of containing one or more of said ions with a composition comprising zero-valent iron and a culture of one or more hydrogenotrophic bacteria, or contacting said aqueous solution with a device comprising a composition comprising zero-valent iron and a culture of one or more hydrogenotrophic bacteria.
- 39. A method for removing or reducing the concentration of a nitroaromatic compound in a sample comprising contacting a sample suspected of containing said nitroaromatic compound with one or more hydrogenotrophic bacteria and zero-valent iron, or a device comprising culture medium comprising zero-valent iron.
Specification