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Breakthrough Curves and Elution Patterns of Heavy Metals in Sandy Clay Loam and Clay Soils  

Chung, Doug-Young (Department of Bioenvironmental Chemistry, College of Agriculture and Life Science Chungnam National University)
Noh, Hyun-H. (Department of Bioenvironmental Chemistry, College of Agriculture and Life Science Chungnam National University)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.39, no.1, 2006 , pp. 21-28 More about this Journal
Abstract
We investigated the mobilization of Cd, Pb, and Cr in two different soils in response to sorption capacities and competition for available sorption site while they moved under saturated water conditions. Two soil samples that were clay and sandy clay loam were collected within 20 cm from the upland surface. To do this, we used three different systems of heavy metal combinations such as single, binary, and ternary as solution phase. And then we observed the breakthrough curve (BTC) and elution as a function of pore volume by applying heavy metal solution and displacing K solution until these curves reached to maximum and minimum. The results showed that BTC and elution curves were not symmetric and it required more pore volumes with increasing species of heavy metals in solution phase, as well as longer tailings. Compared the areas over and under BTC and elution curve, relatively small amount of heavy metal was displaced by K even though there were differences in electronegativity among heavy metals. Conclusively, we assumed that heavy metals transport in soil could be influenced by soil physical nonequilibrium and chemical equilibrium in solution as far as there were more than two species of heavy metals existed.
Keywords
Breakthrough curve; Elution Pattern; Pore Volume; Multi Species; Heavy Metal;
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