Containment Facilities to Promote Contaminant Separation and Degra- Dation
نویسنده
چکیده
Due to their relatively lower cost, sediment containment technologies are currently favored over treatment processes to manage large quantities of polychlorinated biphenyl (PCB) contaminated sediments. However, since containment does not reduce the PCB concentration in the sediments, it should be considered a temporary remedial measure that will require perpetual monitoring and maintenance. By designing, operating, and managing containment facilities to promote organochloride separation and destruction, they can be used as treatment facilities. The physicochemical properties of PCBs in many anaerobic sediments will facilitate separation and treatment. It is difficult to inexpensively treat PCB-contaminated sediments due to the strong sorption of the contaminant to organic and inorganic particulate matter. Once separated from the particulates, however, volatile and aqueous contaminants can be more easily destroyed by existing treatment technologies. A conceptual model for containment cell management includes multi-phased treatment processes incorporating 1) anaerobic dechlorination, 2) aerobic degradation, 3) enhanced desorption processes, 4) leachate and vapor treatment, and 5) passive in situ residual treatment. The ultimate objective is to produce a residual contaminant fraction with significantly reduced mobility and bioavailability.
منابع مشابه
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تاریخ انتشار 2001