Research Team "Environment and Health", Department of Biology, Polydisciplinary Faculty, Cadi Ayyad University, Safi, Morocco; Laboratory of Applied Sciences for the Environment and Sustainable Development, High School of Technology, Cadi Ayyad University, Essaouira, Morocco.
Phycology, Blue Biodiversity and Biotechnology RU, Laboratory of Plant Biotechnology, Ecology and Ecosystem Valorization - CNRST Labeled Research Unit N°10, Faculty of Sciences, Chouaib Doukkali University, 24000 El Jadida, Morocco.
Mar Pollut Bull. 2022 Jun;179:113680. doi: 10.1016/j.marpolbul.2022.113680. Epub 2022 May 5.
The bioaccumulation of trace metals Cd, Cr, Cu and Zn in soft tissues of the mussel Mytilus galloprovincialis was studied seasonally along the Atlantic coast of northwestern Morocco. Average concentrations (μg g dry weight) decreased in the following order: Zn (141.61 ± 78.06) > Cr (22.57 ± 15.47) > Cu (18.95 ± 20.01) > Cd (16.33 ± 19.01), with higher amounts during wet seasons. The "Metal Pollution Index" and "Individual Multimetal Bioaccumulation Index" suggested a higher mussel contamination in industrialized areas. Moreover, Cd and Cr concentrations were above the permissible guidelines' limits. The related risks to human health associated with mussel consumption were also assessed. The "Target Hazard Quotient" for Cd and Cr revealed a threat to children when mussels originated from polluted stations, while the "Hazard Index" indicated a hazard to them in all stations. Regarding the "Maximum Safe Consumption", children should not consume mussels, even in low quantities. This study represents the first datum in Morocco to assess such a risk to human health.
本研究调查了摩洛哥西北部大西洋沿岸贻贝（Mytilus galloprovincialis）组织中痕量金属 Cd、Cr、Cu 和 Zn 的生物累积情况。按平均浓度（μg/g 干重）顺序，各元素含量高低依次为：Zn（141.61±78.06）>Cr（22.57±15.47）>Cu（18.95±20.01）>Cd（16.33±19.01），且各元素在雨季的浓度更高。“金属污染指数”和“个体多金属生物累积指数”表明，工业区贻贝的污染程度更高。此外，Cd 和 Cr 的浓度均超过了允许的指导限值。还评估了食用贻贝对人类健康的相关风险。“目标危害系数”表明，来自污染区的贻贝对儿童的 Cd 和 Cr 具有威胁，而“危害指数”则表明所有站点的贻贝都对儿童存在危害。至于“最大安全食用量”，儿童即使少量食用贻贝也不安全。本研究是摩洛哥首次评估此类人类健康风险的研究。
