University of Nice Sophia Antipolis, ECOMERS, Nice, France.
J Hazard Mater. 2013 May 15;252-253:213-9. doi: 10.1016/j.jhazmat.2013.03.001. Epub 2013 Mar 14.
Trace element pollution of marine dredged sediments is an emerging problem all over the world. Comparing to other wastes, trace elements stabilization is more difficult both due to the wide range of contaminants present in the marine sediments and their inherent physicochemical properties. In this study, a pilot-scale experiment was performed to stabilize As, Cd, Cu, Mo, Ni, and Zn in a multi-contaminated sediment sample using hematite, zero-valent iron and zeolite. Results showed that iron-based amendments were able to reduce the leaching and the bioavailability of trace elements in the sediment sample, while zeolite was unsuitable. Chemical stabilization through iron-based amendments seems to be a promising approach as a low-cost alternative to traditional stabilization methods involving chemical reagents.
海洋疏浚沉积物中的微量元素污染是一个全球性的新兴问题。与其他废物相比，由于海洋沉积物中存在的污染物范围很广，且其具有固有物理化学性质，因此微量元素的稳定化更加困难。在这项研究中，使用赤铁矿、零价铁和沸石对多污染沉积物样品中的砷、镉、铜、钼、镍和锌进行了中试规模的稳定化实验。结果表明，铁基添加剂能够降低沉积物样品中微量元素的浸出和生物有效性，而沸石则不适用。通过铁基添加剂进行化学稳定化似乎是一种很有前途的方法，可作为涉及化学试剂的传统稳定化方法的低成本替代方法。
