Department of Environmental Engineering, Chulalongkorn University, Bangkok 10330, Thailand.
Department of Environmental Engineering, Chulalongkorn University, Bangkok 10330, Thailand; Research Network of NANOTEC-CU (RNN) on Environment, Chulalongkorn University, Bangkok 10330, Thailand; Professor Aroon Sorathesn Center of Excellence in Environmental Engineering, Department of Environmental Engineering, Chulalongkorn University, Bangkok, 10330, Thailand.
Mar Pollut Bull. 2023 Sep;194(Pt B):115256. doi: 10.1016/j.marpolbul.2023.115256. Epub 2023 Jul 19.
Understanding mercury (Hg) species existing after electrokinetic remediation (EK) for marine-sediment remediation is limited. Herein, the Hg fraction removal of EK from contaminated marine sediment was investigated appertaining to bipolar electrode settings along with the effects of electrode spacing and configuration considered. Based on the selective sequential Hg extractions (Hg SSE), much of the Hg in the sediment originated from F5 (i.e., HgS) and F4 (i.e., HgO). The F5 fraction removed by EK was about 30 %, while the F4 fraction had a slight increase of about 34 %. When it comes to electrode configuration, a hexagonal pattern has a higher Hg removal performance than that of a rectangular shape. The addition of anodes increases the remediation surface area, thus allowing superior Hg removal. This study indicates that the electrode spacing significantly affects the mercury removal and the remediation time. Determining suitable spacing enhances the electrical potentials in the migration flux.
对于海洋沉积物修复的电动修复（EK）后存在的汞（Hg）物种的理解有限。本文针对双极电极设置，研究了 EK 从污染海洋沉积物中去除 Hg 形态的情况，并考虑了电极间距和配置的影响。基于选择性顺序 Hg 提取（Hg SSE），沉积物中大部分 Hg 来自 F5（即 HgS）和 F4（即 HgO）。EK 去除的 F5 分数约为 30%，而 F4 分数略有增加，约为 34%。就电极配置而言，六边形图案比矩形形状具有更高的 Hg 去除性能。增加阳极会增加修复表面积，从而实现更好的 Hg 去除。本研究表明，电极间距显着影响汞去除和修复时间。确定合适的间距可增强迁移通量中的电潜力。
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