Libralato Giovanni, Losso Chiara, Arizzi Novelli Alessandra, Citron Marta, Della Sala Stefano, Zanotto Emanuele, Cepak Franka, Volpi Ghirardini Annamaria
Environmental Sciences Department, Venice University Cà Foscari, Campo della Celestia 2737/b, I-30122 Venice, Italy.
Environ Pollut. 2008 Dec;156(3):644-50. doi: 10.1016/j.envpol.2008.06.025. Epub 2008 Jul 25.
This work assesses the ecotoxicological effects of polluted sediment after a decontamination treatment process using a new sediment washing technique. Sediment samples were collected from four sites in Marghera Port industrial channels (Venice, Italy). Ecotoxicological evaluations were performed with Vibrio fischeri and Crassostrea gigas bioassays. Whole sediment and elutriate were deemed as the most suitable environmental matrices for this study. Toxicity scores developed in the Lagoon of Venice for V. fischeri on whole sediment and for C. gigas on elutriate were considered for the final ranking of samples. Ecotoxicological results showed that the treated sediment samples presented both acute and sub-chronic toxicities, which were mainly attributed to the presence of some remaining chemicals such as metals and polyaromatic hydrocarbons. The acute toxicity ranged from low to medium, while the sub-chronic one from absent to very high, suggesting that treated sediments could not be reused in direct contact with seawater.
本研究采用一种新的沉积物清洗技术，评估了污染沉积物在去污处理后的生态毒理学效应。沉积物样本取自意大利威尼斯马尔盖拉港工业航道的四个地点。采用费氏弧菌和太平洋牡蛎生物测定法进行生态毒理学评估。全沉积物和淘析液被认为是本研究最合适的环境基质。根据威尼斯潟湖针对全沉积物中的费氏弧菌以及淘析液中的太平洋牡蛎制定的毒性评分，对样本进行最终排名。生态毒理学结果表明，处理后的沉积物样本同时呈现出急性和亚慢性毒性，这主要归因于一些残留化学物质的存在，如金属和多环芳烃。急性毒性范围为低到中等，而亚慢性毒性范围为无到非常高，这表明处理后的沉积物不能直接与海水接触后再利用。
