Modeling Elution Histories of Copper and Lead from Contaminated Soil Treated by Poly(amidoamine) Dendrimers
by Yinjui Xu, (Grad. Res. Asst., Dept. of Civ. Engrg., 238 Harbert Engrg. Ctr., Auburn Univ., Auburn, AL 36849. E-mail: xuyinhu@auburn.edu), Dongye Zhao, (corresponding author), (Huff Assoc. Prof., Dept. of Civ. Engrg., 238 Harbert Engrg. Ctr., Auburn Univ., Auburn, AL 36849 E-mail: dzhao@eng.auburn.edu), and T. Prabhakar Clement, (Prof., Dept. of Civ. Engrg., 238 Harbert Engrg. Ctr., Auburn Univ., Auburn, AL 36849. E-mail: clement@eng.auburn.edu)
Journal of Environmental Engineering, Vol. 134, No. 4, April 2008, pp. 238-246, (doi: http://dx.doi.org/10.1061/(ASCE)0733-9372(2008)134:4(238))
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| Document type: |
Journal Paper |
| Abstract: |
A dynamic “two-site” model was formulated and tested for simulating the elution histories of copper (Cu²+) and lead (Pb²+) from a contaminated soil treated by poly(amidoamine) dendrimers. In the model, the metal sorption sites of the soil were divided into two compartments: one with a fast desorption rate and the other with a slow desorption rate. The model was tested for simulating and predicting Cu²+ and Pb²+ elution histories obtained from column experiments. Compared to the classical “one-site” model and the modified “gamma distribution” model, the “two-site” model not only provides much improved power for simulating the observed metal elution data, but also can more accurately predict the metal elution histories under various experimental conditions including initial metal concentration in soil, dendrimer concentration, and pH. |
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