m, were investigated under a constant 100?V. A square configuration with electrode spacing of 2?m removed 61.5?% of As, 11.4?% of Cu, and 0.9?% of Pb, respectively, and a hexagonal configuration with the same spacing showed a higher removal efficiency in top (59?% of As, 0-.5?m) and middle (53?% of As, 0.5-.0?m) layers, but much lower removal efficiency in the bottom layer (1-.5?m), which was thought to be due to groundwater flow through periodic rise and fall of tides. Fractionation analysis showed that As bound to Fe–Mn oxyhydroxide was the main form of As removed by the electrokinetic process. The two-dimensional configuration wasted less electrical energy by Joule heating, and required fewer electrode installations, compared to the one-dimensional electrode configuration." />
Field application of electrokinetic remediation for multi-metal contaminated paddy soil using two-dimensional electrode configuration
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  • 作者：Woo-Seung Kim (1)
    Eun-Ki Jeon (2)
    Ji-Min Jung (2)
    Hong-Bae Jung (3)
    Sung-Hwan Ko (3)
    Chang-Il Seo (1)
    Kitae Baek (2) (4)
  • 关键词：Paddy soil ; Field application ; Electrolyte ; conditioning ; Sequential extraction ; Fractionation
  • 刊名：Environmental Science and Pollution Research
  • 出版年：2014
  • 出版时间：March 2014
  • 年：2014
  • 卷：21
  • 期：6
  • 页码：4482-4491
  • 全文大小：579 KB
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  • 作者单位：Woo-Seung Kim (1)
    Eun-Ki Jeon (2)
    Ji-Min Jung (2)
    Hong-Bae Jung (3)
    Sung-Hwan Ko (3)
    Chang-Il Seo (1)
    Kitae Baek (2) (4)

    1. Department of Soil and Groundwater, Korea Environment Corporation (KECO), 42 Hwangyeong-ro, Seo-gu, Incheon, 404-708, South Korea
    2. Department of Environmental Engineering, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju, Jeollabuk-do, 561-756, South Korea
    3. Ecophile, Yangjae, Seocho, Seoul, South Korea
    4. Department of Bioactive Material Sciences, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju, Jeollabuk-do, 561-756, South Korea
  • ISSN：1614-7499
文摘
In this study, we evaluated the feasibility of in situ electrokinetic remediation for arsenic (As)-, copper (Cu)-, and lead (Pb)-contaminated soil, in a pilot-scale field application with two-dimensional electrode configurations. Square and hexagonal configurations with different electrode spacing, 1?m and 2-span class="a-plus-plus emphasis type-underline">m, were investigated under a constant 100?V. A square configuration with electrode spacing of 2?m removed 61.5?% of As, 11.4?% of Cu, and 0.9?% of Pb, respectively, and a hexagonal configuration with the same spacing showed a higher removal efficiency in top (59?% of As, 0-.5?m) and middle (53?% of As, 0.5-.0?m) layers, but much lower removal efficiency in the bottom layer (1-.5?m), which was thought to be due to groundwater flow through periodic rise and fall of tides. Fractionation analysis showed that As bound to Fe–Mn oxyhydroxide was the main form of As removed by the electrokinetic process. The two-dimensional configuration wasted less electrical energy by Joule heating, and required fewer electrode installations, compared to the one-dimensional electrode configuration.

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