Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100, Sassari, Italy.
Istituto Zooprofilattico della Sardegna, Via Duca degli Abruzzi 8, 07100, Sassari, Italy.
Environ Sci Pollut Res Int. 2021 May;28(20):25770-25781. doi: 10.1007/s11356-021-12380-4. Epub 2021 Jan 20.
The occurrence of 21 trace elements in native Mediterranean mussel (Mytilus galloprovincialis) from the Calich Lagoon, a typical brackish area of the northwest of Sardinia (Italy), was investigated. The seasonal variation of metals in bivalves was considered, and the highest values were found in spring and summer; in particular, a high significant (P < 0.001) temporal variation was reported for silver (Ag) and mercury (Hg). The highest and similar concentrations were registered for aluminium (Al, mean 32 mg kgwet weight), iron (Fe, mean 32 mg kg w. w.), and zinc (Zn, mean 25 mg kg w. w.). The maximum limits set by European Regulations for cadmium (Cd), mercury (Hg), and lead (Pb) were never exceeded. Speciation analysis revealed negligible risk related to inorganic arsenic (iAs). Therefore, M. galloprovincialis confirmed its role as suitable bioindicator to monitor the contamination of coastal environments. Although the recommended tolerable weekly intake (TWI) was not exceeded, the levels of aluminium should be carefully evaluated in monitoring plans in the studied lagoon. Graphical abstract.
研究了产自意大利撒丁岛西北部典型咸水区域卡利奇泻湖的本地贻贝（Mytilus galloprovincialis）中 21 种微量元素的含量。考察了双壳类动物体内金属元素的季节性变化，结果发现春季和夏季的含量最高；特别是银（Ag）和汞（Hg）的含量存在显著的时间变化（P<0.001）。铝（Al，均值 32mg/kg 湿重）、铁（Fe，均值 32mg/kg 湿重）和锌（Zn，均值 25mg/kg 湿重）的浓度最高且相似。贻贝中镉（Cd）、汞（Hg）和铅（Pb）的含量从未超过欧洲法规规定的最高限量。形态分析表明无机砷（iAs）的风险可以忽略不计。因此，贻贝证实了其作为监测沿海环境污染的合适生物指示剂的作用。尽管未超过推荐的可耐受每周摄入量（TWI），但在研究泻湖的监测计划中，应仔细评估铝的含量。
