Environmental impact of mining activity on the pollution of the Medjerda River, north-west Tunisia |
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| Authors: | E. A. Jdid P. Blazy S. Kamoun A. Guedria B. Marouf S. Kitane |
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| Affiliation: | (1) Laboratoire Environnement et Minéralurgie, CRVM (ENSG-INPL-CNRS UMR 75-69), BP 40, F-54501 Vandoeuvre, France Fax: +33-3 83 55 21 53 e-mail: jdid@ensg.u-nancy.fr, FR;(2) Direction Générale des Ressources en Eau, BIRH, 43 Rue de la Manoubia, 1008 Montfleury Supérieur, Tunis, Tunisia,;(3) Office National des Mines, BP 215 – 1080 Tunis, Tunisia,;(4) école Nationale de l'Industrie Minérale, Département Mines, BP 753 – Agdal, Rabat, Morocco, MA |
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| Abstract: | In the Fej Hcine mining area of north-west Tunisia, the Medjerda River and its principal tributary, El Melah, are polluted by heavy metals and arsenic. The geochemical studies undertaken have indicated pronounced falls in the concentrations of metals since the mining activities ceased, although the river sediments still contain higher levels than the local host rocks, particularly arsenic and zinc. At the Tunisia/Algeria border, arsenic concentrations in the Medjerda waters can exceed 1 mg/l. Leaching tests on samples of ore, flotation tailings and an arseniferous mass indicate that whilst Zn, Pb, Cu and Cd concentrations do not exceed 1 mg/l in the leachate solutions, arsenic levels reach 5, 344 and 9,400 mg/l respectively. The study has shown that the pollution originates not only from the mining activities but also from the mineral occurrences present in the mining district and from another source within Algeria. Received: 18 May 1998 · Accepted: 24 June 1998 |
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| Keywords: | Pollution Heavy metals Arsenic Mine tailings River Medjerda Tunisia |
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