Fereja Workineh Mengesha, Muda Chuluke, Labena Abraham Alemayehu
Department of Chemistry, College of Natural and Computational Sciences, Energy and Environment Research Center, Dilla University, 419, Dilla, Ethiopia.
Department of Chemistry, College of Natural and Computational Sciences, Dilla University, 419, Dilla, Ethiopia.
J Trace Elem Med Biol. 2024 Dec;86:127529. doi: 10.1016/j.jtemb.2024.127529. Epub 2024 Sep 14.
The possible health effects of consuming milk contaminated with heavy metals have been the subject of considerable concern worldwide.
The aim of this study was to determine the level of heavy metals in cow's milk in the vicinity of MIDROC Laga Dambi gold mine and to assess their possible health risks for consumers.
Nine composite samples were formed by aggregating 243 milk samples obtained in triplicates from 81 domestic milk-producing households. Inductively coupled plasma-optical emission spectroscopy was used to measure the amount of heavy metals after samples digestion under optimal conditions.
The heavy metals concentrations obtained were 13.913-7.843, 9.505-3.589, 5.972-3.147, 2.288-1.851, 0.403-0.143, 0.436-0.128, 0.26-0.153, 0.143-0.048, 0.160-ND (not detected), and 0.140-ND mgkgfor Fe, Zn, Pb, Mn, Hg, Cr, Cd, As, Ni, and Co, respectively. Of the heavy metals identified, the levels of Pb, As, Cd, and Hg exceeded the recommended value. Based on the estimated daily intake (EDI), the total health quotient (THQ) is higher than unity even for Pb alone. It has been found that the consumption of cow milk increases the health index (HI) by 2.972. Ninety five percent of the HI in the study area was explained by the toxic heavy metals (Pb, Cd, As, and Hg) in the cow milk, which were found to be beyond the safe limit.
This demonstrates that there is a health risk to the population who consume cow's milk sourced from the vicinity of MIDROC Laga Dambi gold mine. To safeguard the public's health, we advised strict monitoring and legislative control for the safety of cow's milk originating from study area.
食用受重金属污染的牛奶可能对健康产生的影响已成为全球广泛关注的问题。
本研究旨在测定米德洛克拉加丹比金矿附近牛奶中的重金属含量，并评估其对消费者可能产生的健康风险。
从81个家庭奶牛养殖户采集的243份牛奶样本，每份样本取3份进行汇总，形成9个混合样本。在最佳条件下对样本进行消解后，采用电感耦合等离子体发射光谱法测量重金属含量。
所测得的重金属浓度分别为：铁13.913 - 7.843mg/kg、锌9.505 - 3.589mg/kg、铅5.972 - 3.147mg/kg、锰2.288 - 1.851mg/kg、汞0.403 - 0.143mg/kg、铬0.436 - 0.128mg/kg、镉0.26 - 0.153mg/kg、砷0.143 - 0.048mg/kg、镍0.160 - 未检出（ND）mg/kg、钴0.140 - 未检出mg/kg。在所鉴定出的重金属中，铅、砷、镉和汞的含量超过了推荐值。根据估计的每日摄入量（EDI），即使仅铅一项，总健康商数（THQ）就高于1。研究发现，饮用牛奶会使健康指数（HI）提高2.972。研究区域内95%的健康指数可由牛奶中超过安全限值的有毒重金属（铅、镉、砷和汞）来解释。
这表明食用来自米德洛克拉加丹比金矿附近的牛奶会对人群健康构成风险。为保障公众健康，我们建议对来自研究区域的牛奶安全进行严格监测和立法控制。
