IN SITU IMMOBILIZATION OF COPPER, ZINC AND LEAD POLLUTED SOILS. | ||||
| Journal of Soil Sciences and Agricultural Engineering | ||||
| Article 6, Volume 7, Issue 3, March 2016, Page 273-279 PDF (487.96 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jssae.2016.39391 | ||||
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| Authors | ||||
| M. Abdel-Hamid1; M. Kamel1; Samira Mahrous2; Omnia Farouk2 | ||||
| 1Soil Sci. Dep., Fac. Agric., Cairo University, Giza, Egypt . | ||||
| 2Soil, Water and Environment Research Institute, ARC, Giza, Egypt | ||||
| Abstract | ||||
| In situ immobilization technique. Two rates (0.5 and 1.0%) of five immobilizing agents (hydrogel, polymer, zeolite, mud and geothite) were used for remediation of Cu, Zn and Pb polluted soils. Three soils containing various levels of Cu (66.9-82.9 ug/g) , Zn (150–328.0 ug/g) and Pb (59.7– 181 ug/g) were used. Incubation experiment was conducted to study the effect of these agents on soil available content of Cu, Zn and Pb. All immobilizing agents reduced the amount of DTPA available of these metals . The addition of 0.5 and 1% application rate of all agents was sufficient to decrease the DTPA extractable Cu by more than 50% compared to the untreated soils. The DTPA extractable Zn decreased by values ranged between 39.6-86.7% and 49.3 to 92.6% for soils treated with 0.5 and 1% , respectively compared to untreated soils. The available Pb values was decreased by 44.7-57.8 and 47.5-75.4% compared to untreated soils at application rate 0.5% and 1%, respectively. The ability of these agents in immobilizing Cu, Zn and Pb increased with increasing their rate of application and could be arranged as follows : Zeolite< Polymer<Goethite<Mud<Hydrogel for Cu Hydrogel< Mud < Goethite < Polymer< Zeolite for Zn Hydrogel< Mud< Zeolite< Goethite< Polymer for Pb in the tested three soils. | ||||
| Keywords | ||||
| Heavy metals; Remediation; Immobilization; copper; Zinc and Lead | ||||
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