Migration of chloroform in aquifers

Article Abstract:

An investigation on the fluid dynamics of dense chlorinated solvents or chlorinated hydrocarbons (CHCs) was conducted to provide a base for solving the problems of ground-water contamination. Analysis of two quantitative models using a case study in the Louisville aquifer, KY, complemented the qualitative findings of the investigation. Results showed that for the unsaturated zone, transport of CHCs was controlled by diffusion in the gaseous phase and vertical advection. In saturated zones, the transport process was advection along the regional horizontal ground-water flow velocity, and dispersion.

Models, Hydrocarbon research

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UV pilot testing: intensity distributions and hydrodynamics

Article Abstract:

A study on the fundamental differences between small- and large-scale ultraviolet (UV) systems in relation to pilot testing has been made. In the absence of an accurate predictive model of UV disinfection, pilot-scale systems will remain as the tool to assess potential effectiveness of UV disinfection on a site-by-site basis. The results have indicated the advantages of numerical modeling of UV intensity distributions from mercury arc lamps and the advantages of the large pilot systems in terms of hydraulic behavior.

Testing, Ultraviolet radiation, Air pilots, Aircraft pilots

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Migration of chloroform in aquifiers

Article Abstract:

A discussion and reply to the discussion on the migration of chloroform in aquifiers is presented. The discussion criticizes a model of chloroform migration in aquifiers at a constant infiltration rate. Possible explanations for the high chloroform concentrations at a given period is presented. The reply to the discussion acknowledges the points raised and criticizes the modification made to the formula that models the transport process.

Environmental aspects, Environmental engineering

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