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首页> 外文期刊>Environmental toxicology and chemistry >Ecological risk assessment of persistent toxic substances for the clam Tapes philipinarum in the Lagoon of Venice, Italy.
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Ecological risk assessment of persistent toxic substances for the clam Tapes philipinarum in the Lagoon of Venice, Italy.

机译：意大利威尼斯泻湖中的菲律宾蛤Tape磁带中持久性有毒物质的生态风险评估。

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摘要

Because of contamination of sediments of the Lagoon of Venice, Italy, by inorganic pollutants (e.g., arsenic, cadmium, chromium, copper, lead, mercury, nickel, and zinc) and organic pollutants (e.g., polychlorobiphenyls), as well as the ecological and economical relevance of the edible clam Tapes philipinarum, an ecological risk assessment was undertaken to ascertain the extent of bioaccumulation that would pose a significant risk. Risk was estimated by means of toxic units and hazard quotient approaches, by comparing the exposure concentration with the effect concentration. Clam exposure was estimated by applying previous results based on bioaccumulation spatial regression models. In addition, a comparison was made between sum of dioxin-like polychlorinated biphenyl (PCB) congeners and total PCB bioaccumulation provided by spatial regression models and by a partitioning model. The effect concentrations were calculated as tissue screening concentrations, as the product of pollutant sediment quality criteria and the bioaccumulation factor. Finally, the cumulative risk posed by selected inorganic pollutants and total PCBs was estimated and a map of risk was drawn. The resulting chemicals of potential ecological concern were mercury, cadmium, arsenic, and nickel, as well as, to a lesser extent, total PCBs.
机译：由于意大利威尼斯泻湖的沉积物受到无机污染物（例如砷，镉，铬，铜，铅，汞，镍和锌）和有机污染物（例如多氯联苯）的污染，以及生态环境的污染与食用蛤Tape菲律宾带的经济相关性，我们进行了生态风险评估，以确定可能构成重大风险的生物蓄积程度。通过将暴露浓度与效应浓度进行比较，通过毒性单位和危险商方法估算风险。通过基于生物积累空间回归模型的先前结果来估计蛤的暴露。此外，还比较了二恶英样多氯联苯（PCB）同类物的总和与空间回归模型和分区模型提供的总PCB生物蓄积量。效应浓度被计算为组织筛选浓度，污染物沉积物质量标准和生物蓄积因子的乘积。最后，估算了由选定的无机污染物和多氯联苯构成的累积风险，并绘制了风险图。所产生的可能引起生态关注的化学物质为汞，镉，砷和镍，以及总含量较少的PCB。

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