Performance of electrokinetic remediation system for mercury contaminated marine sediment: Roles of electrode spacing and electrode configuration

被引：4

作者：

Bunditboondee, Chotikoon ^{[1
]}

Lohwacharin, Jenyuk ^{[1
,2
,3
]}

Khan, Eakalak ^{[4
]}

Laohhasurayotin, Kritapas ^{[5
]}

机构：

[1] Chulalongkorn Univ, Dept Environm Engn, Bangkok 10330, Thailand

[2] Chulalongkorn Univ, Res Network NANOTEC CU RNN Environm, Bangkok 10330, Thailand

[3] Chulalongkorn Univ, Prof Aroon Sorathesn Ctr Excellence Environm Engn, Dept Environm Engn, Bangkok 10330, Thailand

[4] Univ Nevada, Civil & Environm Engn & Construction Dept, Las Vegas, NV 89154 USA

[5] Natl Sci & Technol Dev Agcy, Natl Nanotechnol Ctr, Pathum Thani 12120, Thailand

来源：

MARINE POLLUTION BULLETIN | 2023年 / 194卷

关键词：

Electrokinetic remediation (EK); Marine sediment; Mercury fraction; Electrode spacing; Electrode configuration; HEAVY-METALS; SOIL; SPECIATION; REMOVAL; CU; TRANSPORT; PB;

D O I：

10.1016/j.marpolbul.2023.115256

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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.

引用

页数：10

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