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Modeling Elution Histories of Copper and Lead from Contaminated Soil Treated by Poly(amidoamine) Dendrimers |
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| Authors: | Yinhui Xu Dongye Zhao T Prabhakar Clement |
| Affiliation: | 1Graduate Research Assistant, Dept. of Civil Engineering, 238 Harbert Engineering Center, Auburn Univ., Auburn, AL 36849. E-mail: xuyinhu@auburn.edu 2Huff Associate Professor, Dept. of Civil Engineering, 238 Harbert Engineering Center, Auburn Univ., Auburn, AL 36849 (corresponding author). E-mail: dzhao@eng.auburn.edu 3Professor, Dept. of Civil Engineering, 238 Harbert Engineering Center, Auburn Univ., Auburn, AL 36849. E-mail: clement@eng.auburn.edu |
| 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. |
| Keywords: | Abatement and removal Models Remedial action Extraction procedures Heavy metals Soil pollution Soil treatment |