EVALUATION OF CHEMICAL REMEDIATION TECHNIQUES OF P8-CONTAMINATED SOILS USING KINETIC APPROACH | ||
| Journal of Soil Sciences and Agricultural Engineering | ||
| Article 4, Volume 30, Issue 7, July 2005, Pages 4303-4319 PDF (1.82 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jssae.2005.235814 | ||
| Authors | ||
| A. M. Zaghloul; M.A. Abou Seeda | ||
| Solis and Water Use Dept. and Plant nutrition Dept., National Research Centre, Dokkl, Cairo, Egypt | ||
| Abstract | ||
| This study investigated the effect of rock phosphate (RP). polyvinyl acetate butyl acrylate emulsion 50% active material w/w (PVAc) and Humic acid (HA) as natural and synthetic materials applied in remediation. and time of soil incubation on rates of lead (Pb) desorption from three Egyptian soils. alluvial clay soil (Typ < /em>ic torrens), calcareous soil (Typ < /em>ic calcids) and Sandy soil (Typ < /em>ic psamments), using electrical stirred flow technique (ESFU). Lead fractionations in the studied soils were also investigated after 2 and 16 weeks. The obtained results showed that in all soil treatments, the applied materials were significantly reduced the extractable fraction of Pb as in following order: HA> RP> PVAc. In addition to that. the percentages of Pb extracted from the studied soils by (NH4HC03) DTPA generally decreased wilh increasing time of soil incubation in both amended and non-amended soil samples. Data of Pb distribution in different fractions showed that reducing of Pb extracted from different soils may be attributed to precipitation! adsorption of Pb. rendering Pb less available. The drtferent mechanisms of remediation effects of the used matertals from kinetic study and Pb distribution in different soils were discussed. | ||
| Keywords | ||
| chemical remediation. Pb; kinetic models; Pb fractionation | ||
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