The potential for human activities to adversely affect the environment has become of
increasing concern during the past two decades. Concomitantly, the transport and fate of …

Mass transfer between immobile and mobile zones is a consequence of simultaneous
processes. We develop a “multirate” model that allows modeling of small‐scale variation in …

We present an efficient method for determining temporal moments of concentration for a
solute subject to first‐order and diffusive mass transfer in steady velocity fields. The …

Without question, one of the important paradigms in our society is preservation of the
environment. Worldwide, concerns have been voiced about numerous soil and water …

The ability of different aerobic groundwater microorganisms to cometabolically degrade
trichloroethylene (TCE), 1, 2-cis-dichloroethylene (c-DCE), and 1, 2-trans-dichloroethylene (t …

Simulation models for the fate and transport of groundwater contaminants are important
tools for testing our understanding of transport phenomena at long-term contaminated sites …

More efficient methods are needed for the in situ evaluation of solute sorption to aquifer
sediments. The objective of this study was to develop a simplified method for estimating …

When pumping contaminated water from an aquifer, contaminant concentrations often
decline rapidly, only to rebound when the pump is shut off. One reason for this behavior is …

The development of an appropriate model for sorption processes in natural systems has
proven elusive. We hypothesize that standard deterministic models cannot capture the …

An understanding of the kinetics and mechanisms of metal and oxyanion sorption on soil
minerals and soils is fundamental in assessing the speciation, mobility, and bioavailability of …