Recent difficulties in siting dredged material disposal facilities are increasing interests in alternative disposal or reuse of dredged material and the possible adverse consequences of any increases in the generation of dredged materials. This paper focuses on economic aspects of these issues. Simple methods are suggested for evaluating the economics of increasing or decreasing the rate of dis...

We are a privately held corporation that is engaged in the business of contract reclamation of chemicals for reuse and disposal of chemicals where reclamation is not economically feasible. The idea of this business was conceived several years ago with the serious planning and financing stages developing about four years ago. Then subsequent plant site development resulted in the beginning of op...

Aeronautic/aerospace applications, both military and commercial, are accounting for a large share of the growing composite market in value. However, their share of the market in volume is much smaller. Costs are high when large amounts of carbon fiber reinforcements are used. These high performance composite materials have six properties that give them an edge over traditional materials: longer...

Sulfide minerals (mainly FeS2) contained in lead-zinc tailings are easy to be acidified the air. The acidification mechanism is that tailing sand generates sulfuric acid and sulfate under catalysis of oxidant, water oxygen. acidic liquid generated by reaction will continue react with metal oxides form an insoluble precipitate.In order reveal corresponding changes chemical properties physical du...

The impact of current and historical waste disposal practices on the environment and human health of Indigenous people in First Nations communities has yet to be adequately addressed. Solid waste disposal has been identified as a major environmental threat to First Nations Communities. A community-based participatory research project (CBPR) was initiated by the Saskatoon Tribal Council Health a...