Heavy metal levels and adsorption capacity of Nile River sediments

Citation
Me. Soltan et al., Heavy metal levels and adsorption capacity of Nile River sediments, INT J ENV A, 80(3), 2001, pp. 167-186
Citations number
32
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology
Journal title
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
ISSN journal
0306-7319 → ACNP
Volume
80
Issue
3
Year of publication
2001
Pages
167 - 186
Database
ISI
SICI code
0306-7319(2001)80:3<167:HMLAAC>2.0.ZU;2-N
Abstract
Determination for organic carbon and analyses of Cd, Cu, Mn, Pb and Zn were carried out on extractions (exchangeable and residual phases) of the fract ion smaller than 63 mum of Nile sediment samples. Also, the fraction sedime nt samples were treated by synthetic solutions of metals with different con centrations. According to the index of geoaccumulation, the sediment sample s are unpolluted by Mn, Cu and Zn, but they have high accumulation of Cd an d Ph. The elevated concentrations of Cd and Pb can be attributed to lithoge nic origin and anthropogenic sources (manufactures of metal alloys, batteri es, and plastics; fertilizers and pesticides; and corrosion of galvanized m aterials). The adsorption data suggests that the pH is the important factor in the control of metal ions adsorption onto the bed sediments. Nile sedim ents exhibited high capacity for sorption of heavy metals, especially Pb an d Cd followed by Zn, Cd, and Mn. The adsorption of metal ions on Nile sedim ents follows the Langmuir and Freundlich isotherm models. Statistical analy sis was applied to the results and exhibited good and interesting relations hips.