Pollution of camel milk by heavy metals in Kazakhstan

Konuspayeva Gaukhar, Faye Bernard, Loiseau Gérard, Diacono Emilie, Akhmetsadykova Shynar. 2009. Pollution of camel milk by heavy metals in Kazakhstan. Open Environmental Pollution and Toxicology Journal, 1 : 112-118.

Résumé : Environmental contamination by heavy metals is a common fact in Central Asia. In the present study two sampling procedures were achieved: (i) Sampling of fodder, camel raw milk and shubat (fermented camel milk) in 8 farms closed to pollution sources from the South of Kazakhstan for copper, iron, manganese, zinc, arsenic and lead analysis, (ii) sampling of camel milk in 4 regions of Kazakhstan (63 samples) analyzed for lead, chrome and zinc contamination. In first sampling, camel milk contained 0.07 ± 0.04, 1.48 ± 0.53, 0.08 ± 0.03, 5.16 ± 2.17, <0.1 and 0.025 ± 0.02 ppm respectively for Cu, Fe, Mn, Zn, As and Pb. In shubat (fermented milk) the mean content was 0.163 ± 0.164, 1.57 ± 0.46, 0.088 ± 0.02, 7.217 ± 2.55 and 0.007 ppm respectively. Arsenic was detected in some samples of milk and shubat only. The trace elements concentration increase in shubat compared to milk but lead concentration decreased. No clear correlation was observed with fodder composition. In second sampling, the lead content was on average 250 ± 56 ppb in the camel milk with no significant differences between regions. The maximum value was observed at Atyrau (532 ppb). Zinc content in milk (5.42 ± 0.2 ppm) did not change significantly between regions. In reverse, chrome (59.5 ± 45.4 ppb) was higher in Shymkent region compared to others. These values were discussed according to the proximity of pollution sources. Specially, higher concentrations were experienced in fodder from pastures close to some industrial sites or high traffic road.

Mots-clés Agrovoc : lait de chamelle, lait fermenté, plomb, métal lourd, composition chimique, contamination chimique, aliment pour animaux, industrie

Mots-clés géographiques Agrovoc : Kazakhstan

Classification Agris : Q03 - Contamination et toxicologie alimentaires
L01 - Élevage - Considérations générales
P02 - Pollution

Champ stratégique Cirad : Axe 3 (2005-2013) - Alimentation accessible et de qualité

Auteurs et affiliations

• Konuspayeva Gaukhar, Al-Farabi Kazakh National University (KAZ)
• Faye Bernard, CIRAD-ES-UPR Systèmes d'élevage (FRA)
• Loiseau Gérard, CIRAD-PERSYST-UMR Qualisud (FRA)
• Diacono Emilie
• Akhmetsadykova Shynar, Al-Farabi Kazakh National University (KAZ)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/552859/)

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