International Journal of Environmental Sciences

Volume 6 Issue 1 2015- July 2015  Pages: 128- 137 <<Previous    Next>>

Fractionation of some heavy metals in agricultural soils around Draa Lasfar mine area in Marrakech (Morocco)

Author Information:

Barkouch Yassir1,2, El Fadeli Sana3, Khadiri Mohy Edine4, Pineau Alain1
1-  Laboratoire de Toxicologie et d’hygiène Industrielle, 1 rue Gaston Veil, 44035, Nantes Cedex, France.
2-  Laboratoire Régional du diagnostic épidémiologique et d’hygiène du milieu –Marrakech – Maroc.
3- Département de biologie, Faculté des Sciences Semlalia, Marrakech- Maroc.
4 - Laboratoire de physique des solides et des couches minces, Bd Moulay Abdellah. BP, 2390-40001, Marrakech (Maroc).

ABSTRACT

Environmental pollution by heavy metals originated from functional mines can become a very important source of contamination both in soil and water. Therefore, the characterization of tailings chemical and physical properties is important to assess the risk of potential environmental mobility of toxic trace metals that are contained in this kind of waste. The chemical forms of some heavy metals in soils and mine tailings around a Draa Lasfar mine in north-west of Marrakech city (Morocco) was studied by determining soil Cd, Cu, Pb, and Zn species using standard solvent extraction and Atomic Absorption Spectrophotometric techniques. The Chemical pools of the metals indicated that the metals were distributed into six fractions with most of the metals residing in the non-residual fractions, suggesting how readily the metals are released into the environment. Considering that the metals mostly occur in the most available forms, it is most likely that the metals must have been derived from a variety of human activities involving dredging, processing and use of metals and/or substances containing metal contaminants, specially mining activity that can pose a risk for the environment due to discharge of tailings all around the mine area.

Keywords: Speciation, heavy metal contamination, mining activity, sequential extraction, soils and tailings..

DOI:10.6088/ijes.6015

© 2015 Copyright by the authors, licensee Integrated Publishing Association.This is an open access article distributed under the Creative Commons Attribution License (3.0) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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