This study performed a Life Cycle Assessment (LCA) on recovery strategies of dredged contaminated marine sediments in a large Mediterranean port located in central Italy (Tuscany) in order to find the most environmentally sound solution. The study considered marine sediments polluted by potentially toxic elements (PTEs) and/or organic compounds, two different sediment particle sizes and the combined use of three soil remediation technologies: soil washing, electrokinetic treatment and enhanced landfarming. The analyzed scenarios depended on the sediment properties and characteristics of the treatment technologies investigated, and were compared with the corresponding reference scenarios, consisting of the landfilling of dredged contaminated sediments. The LCA results show that scenarios associated with sediment recovery generated potential environmental impacts lower than the corresponding reference scenarios. Almost all the impact categories considered in the CML-IA baseline method showed an environmental convenience in the recovery of contaminated sediments, especially for abiotic depletion and global warming. Future studies should focus on optimizing the combined use of multiple technologies and reducing the resource consumptions related to their implementation in order to achieve both environmental and economic benefits.

中文翻译：

---

受污染海洋沉积物的恢复策略：生命周期评估

本研究对位于意大利中部（托斯卡纳）的一个大型地中海港口的疏浚污染海洋沉积物的恢复策略进行了生命周期评估 (LCA)，以找到最环保的解决方案。该研究考虑了被潜在有毒元素 (PTE) 和/或有机化合物污染的海洋沉积物、两种不同的沉积物粒径以及三种土壤修复技术的结合使用：土壤清洗、电动处理和强化土地耕作。所分析的情景取决于所研究的处理技术的沉积物性质和特征，并与相应的参考情景进行比较，包括疏浚污染沉积物的填埋。LCA 结果表明，与沉积物恢复相关的情景产生的潜在环境影响低于相应的参考情景。在 CML-IA 基线方法中考虑的几乎所有影响类别都显示出在恢复受污染沉积物方面的环境便利性，特别是对于非生物耗竭和全球变暖。未来的研究应着眼于优化多种技术的组合使用，减少与其实施相关的资源消耗，以实现环境和经济效益的双赢。