Abstract
Abstract During the last decade, it has been reported that groundwater, surface water, food crops, livestock, and human tissue have all been contaminated with organic chemicals. Although much of the early work focused on pesticides, more recent studies have shown that a wider range of anthropogenic organic chemicals, many of which are designated as priority pollutants, also have been detected. Clearly, the movement of these chemicals through soil governs their potential to be transferred into water courses and foodchains. This review presents an overview of recent advances in sorption/desorption and transport phenomena. Theories currently being invoked to explain the mechanisms of sorption/desorption are discussed and their classification and numerical characterization are described. Water movement and its implications for solute transport are discussed, with emphasis being placed on the importance of soil structure. Finally, the impact of intrinsic factors, such as spatial and temporal variability of wea...
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