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Restoration and protection of aqueous environments by utilizing aquatic organisms
Authors:Vernon P Hershberger  Marilyn G Hershberger  Nicholas R Hild  Jane E Humble
Institution:(1) Groundwater Technology Inc., 2501 Yale Boulevard, SE, Suite No. 204, 87106 Albuquerque, NM, USA;(2) PRC Environmental Management Inc., 2021 Girard Boulevard, SE, Suite No. 250, 87106 Albuquerque, NM, USA;(3) Arizona State University, Box 876806, 85287 Tempe, AZ, USA
Abstract:Summary Past and current uncontrolled dumping, land application and accidental spills of recalcitrant, toxic environmental pollutants such as DDT and polychlorinated biphenyls (PCBs) pose a continued world-wide environmental threat, in particular to aquatic environments. Bioaccumulative contaminants are rapidly absorbed out of water-borne ambient environments and concentrated in the tissues of living aquatic organisms at concentrations that can range from thousands to millions of times greater than levels in the ambient environment. These absorbed levels are high enough to cause dysfunction in the organisms and potential harmful effects to humans. An established technology capable of remediating the low contaminant levels originating in the ambient aquatic environment does not currently exist. This paper proposes the lsquomacro-bioremediation processrsquo whereby certain fish and other macroscopic aquatic organisms could be used to filter, concentrate and remove bioaccumulative contaminants from polluted aqueous systems. Contaminant removal would involve the harvesting and subsequent restocking of aquatic organisms capable of bioaccumulating high contaminant levels in relatively short time periods. Tissues of harvested organisms could be composted with specialized fungus and bacteria to fully degrade the recalcitrant contaminants. The macro-bioremediation process could be used at numerous geographic locations for the restoration of natural aquatic environments, supplemental wetlands treatment and for waste-water, hazardous waste and sludge treatment augmentation.
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