University of Nice Sophia Antipolis, Laboratoire de Radiochimie, Sciences Analytiques et Environnement, Parc Valrose, 06108 Nice Cedex 02, France.
Chemosphere. 2012 Mar;86(11):1112-6. doi: 10.1016/j.chemosphere.2011.12.001. Epub 2011 Dec 22.
The aim of this work is to assess the potential ecotoxicological effects of contaminated sediments treated with mineral additives. The Microtox solid phase test was used to evaluate the effect of mineral additives on the toxicity of sediment suspensions. Four Mediterranean port sediments were studied after dredging and bioremediation: Sample A from navy harbor, sample B from commercial port and samples C and D from pleasure ports. Sediment samples were stabilized with three mineral additives: hematite, zero-valent iron and zeolite. Results show that all studied mineral additives can act as stabilizer agent in highly contaminated sediments (A and C) by decreasing dissolved metal concentrations and sediment toxicity level. On the contrary, for the less contaminated samples (B and D) hematite and zeolite can provoke toxic effect towards Vibrio fischeri since additive particles can favor bacteria retention and decrease bioluminescence emission.
本工作旨在评估用矿物添加剂处理污染沉积物的潜在生态毒理学效应。采用 Microtox 固相试验评估了矿物添加剂对沉积物悬浮液毒性的影响。对疏浚和生物修复后的四个地中海港口沉积物进行了研究：海军港的样品 A、商业港的样品 B 以及休闲港的样品 C 和 D。用三种矿物添加剂稳定沉积物样品：赤铁矿、零价铁和沸石。结果表明，所有研究的矿物添加剂都可以作为高度污染沉积物（A 和 C）的稳定剂，降低溶解金属浓度和沉积物毒性水平。相反，对于污染程度较低的样品（B 和 D），赤铁矿和沸石可能会对发光菌产生毒性效应，因为添加剂颗粒会有利于细菌滞留并降低生物发光的发射。
