32 research outputs found
Early microrecanalization of vas deferens following biodegradable graft implantation in bilaterally vasectomized rats
The effect of different dose regimens in intravesical treatment of urinary bladder cancer with gemcitabine: A randomized phase II marker tumor study
Development of an automated process planning and production activity control system for the manufacturing of engineered work surfaces
Interpositional substitution of free vas deferens segment autografts in rat: feasibility and potential implications
Towards a Cultural Understanding of Teacher Talk: The Teacher Disapproval Category Reexamined
Marketing Alliances Between Non-Profits and Businesses: Changing the Public's Attitudes and Intentions Towards the Cause
Outcomes of Ureteroscopy for Stone Disease in Pregnancy: Results from a Systematic Review of the Literature
Modeling Organic Contaminant Partitioning in Ground-Water Systems
Effective management of a ground-water system requires description and prediction of the transport and fate of contaminants in that system. This can be facilitated by using mathematical models which accurately represent the physical phenomena operative in the system. One of the most significant phenomena impacting the transport of many organic pollutants is partitioning between the solid (soil) and aqueous (ground-water) phases. The tendency of a contaminant to partition may be roughly approximated from measurements of such constitutive properties as the octanol: water partition coefficient of the contaminant and organic carbon content of the soil. Such rough approximations provide a basis for cursory appraisal, but are inadequate for quantitative system descriptions, particularly where nonlinear equilibrium sorption, kinetically dependent partitioning, or irreversible and/or hysteretic phase distribution phenomena are operative. Accurate simulation of solute transport frequently requires the incorporation of kinetic parameters and/or a nonlinear isotherm relationship to define transport phenomena in the fundamental equations governing mass transport. Laboratory measurements may be utilized to assess sorptive factors of importance, kinetic properties of an organic solute and a soil system, and equilibrium partitioning relationships. Such measurements can be utilized to provide more accurate modeling of contaminant transport.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/65827/1/j.1745-6584.1984.tb01429.x.pd