ABSTRACT

In this study, the biosurfactant–enhanced electrokinetic method was investigated for the removal of potentially toxic trace elements (As, Ba, Cd, Cr, Cu, Mo, Ni, Pb, Sb, Se and Zn) in waterways sediments. The effect of this method was compared to the removal capacities of deionized water in the same conditions in order to assess its efficiency. After treatment, batch leaching tests have shown that almost toxic elements (As: 81.3%; Ba: 80%; Cr: 97.3%; Cu: 82%; Zn: 94.5%; Mo: 13.8%; Ni: 62.7%; Se: 66.8% and Sb: 9.3%) were less released in waters. On the whole sediment samples, Ba and Cd displayed the highest removal rates (Ba: 71.2% and Cd: 77.5%). The use of biosurfactant enhanced the electrokinetic method by improving the trace elements migration and altering pH and Eh locally generated by the system. Overall, the application of this new approach dredged sediments seems to be promising but needed further investigations for industrial applications.

摘要

在本研究中，研究了生物表面活性剂增强的电动方法去除水道沉积物中潜在有毒的微量元素（As、Ba、Cd、Cr、Cu、Mo、Ni、Pb、Sb、Se 和 Zn）。将该方法的效果与相同条件下去离子水的去除能力进行比较，以评估其效率。经处理后，批次浸出试验表明，几乎有毒元素（As：81.3%；Ba：80%；Cr：97.3%；Cu：82%；Zn：94.5%；Mo：13.8%；Ni：62.7%；Se： 66.8% 和 Sb：9.3%）在水中的释放较少。在整个沉积物样品中，Ba 和 Cd 的去除率最高（Ba：71.2%，Cd：77.5%）。生物表面活性剂的使用通过改善微量元素迁移和改变系统局部产生的 pH 值和 Eh 来增强电动方法。全面的，