NJ009 – NJCST Dredging
Trenton, New Jersey
In conjunction with Stevens Institute of Technology, ARS achieved the proposed objectives outlined in Phase I, Phase II, and Phase III in the NJCST awarded grant. Sediment for the Phase I study was selected from an area that serves as a tributary to the East River in New York. The sediment was found to consist primarily of silts and clays, and contained a high organic content. Furthermore, a chemical baseline analysis of the sediment revealed the presence of polychlorinated biphenyls (PCBs), chlorinated pesticides and toxic leachable metals which are the type of contaminants desired for this investigation. This investigation demonstrates reactive iron powder as a cost-effective, in situ treatment technology. Moreover, this technology is proposed to reduce in situ or ex situ levels of halogenated organics in sediment, such as the above mentioned contaminants to environmentally accepted levels.
To achieve the desired results, the dehalogenation of the hydrogenated organics and reduction of the leachable toxic cations to zero valence state or the valence state that exhibits the lowest solubility in the micro-batch reactors.
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