Racharach smoke scale


Areas where there are currently few remediation options include oked marshes, mangroves, and coral reefs. These environments are generaky easky damaged by human intmsion and physical cleaning options may not provide any net environmental benefit. Bioremediation may provide some attractive options, and some success has been claimed, on a smak scale, with fertilizer appHcations (13). Marshes and mangroves offer the additional complication that they are typicaky anoxic. Perhaps the anaerobic degradation of ok could be stimulated by inoculation with anaerobic hydrocarbon degrading microbes, or perhaps gende aeration or the addition of slow release oxygen compounds, such as some inorganic peroxides, might stimulate aerobic degradation without significantly changing the redox balance of these environments. This is an area where research is very much in its infancy and there are no wek-documented success stories to date.  [c.29]

Whether or not such stmctures are successfuUy fabricated on a large scale, the abUity to control concentrated coUoidal suspensions, their rheological properties, and the microscopic packing of their particulates continue to be emphasized ia research and play a central role ia the productioa of advanced ceramics. In some iastances, the abUity to prevent particle agglomeration is paramount, whereas ia other cases, the predictioa of the aoa-Newtoaian rheology of coaceatrated coUoidal systems is most critical. Oftea, the two aeeds cannot be easUy separated. The properties of mixed suspensions, ia which more than one type of coUoidal particle is dispersed, is an example that typifies this situation. Although the general properties of these systems resemble those of simpler coUoidal systems, the different coUoids present can iateract with one another, increa sing the complexity of the behavior (107,169). For iastance, the minor component ia a coUoidal mixture can control the overaU stabUity of the suspension (105,106,170), the suspension rheology (106,171), and even the suitabUity of a processiag method (171). A few of the important areas for which concepts about the formation and stabUity of coUoids need to be further developed are the fabrication of composites and other materials, the prevention of corrosion, the extraction of low-grade ores, and the treatment of complex, poUuted environmental systems, including those with radionucUdes formed by the weatheting of high level nuclear waste glass (172) or the deterioration of aging hazardous waste sites (173). Many appHcations increasingly demand an improved abUity to control the rheology of concentrated suspensions ferrofluids, electrorheological fluids, and the storage and transport of blood belong to this group.  [c.401]


Industrial ventilation design guidebook (2001) -- [ c.1416 ]