Scholarlink

<p>As environmental pollution increasingly threatens life, there is a growing need for low-cost devices for easy on-site monitoring of water pollution. We developed the first low-cost, single-use textile lateral-flow, screen-printed, three-electrode microbial electrochemical cell (MEC)-based biosensor for toxicants, using inexpensive textile substrates capable of autonomously absorbing water samples, to our knowledge. The novel biosensor features miniaturized three-electrode cells and is economically fabricated using screen-printing. <i>Shewanella oneidensis</i> was used as a biocatalyst on the working electrode, with lactate as the electron donor. The electrochemical activity of the biocatalyst decreased in proportion to the concentration of the tested toxic substances, formaldehyde or lead Pb(II) resulting in a reduction in current density, which serve as the sensing output. Quantitative analysis was achieved using only chronoamperometry, which can be easily performed on-site. The total working volume of the biosensor was approximately 2 mL. It was capable of detecting formaldehyde and Pb(II) across concentration ranges of 0.001–10 wt% (10–100,000 ppm) and 0.001–10 ppm, respectively. The detection limit for Pb(II) was relatively low compared with previously reported MEC biosensors. These results demonstrate the strong potential of using the textile-based MEC biosensor for simple and low-cost monitoring of water and wastewater quality.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Textile-Based Three-Electrode Microbial Electrochemical Cell-Based Biosensor for Toxicant Detection in Water

  • 期刊论文

  • 发表日期：

    2026年2月16日

查看全文
  • Tae Hyeon Kim,
  • Injun Song,
  • Sang Hyuk Lee,
  • Yoomin Ahn,
  • Hong Liu

摘要

As environmental pollution increasingly threatens life, there is a growing need for low-cost devices for easy on-site monitoring of water pollution. We developed the first low-cost, single-use textile lateral-flow, screen-printed, three-electrode microbial electrochemical cell (MEC)-based biosensor for toxicants, using inexpensive textile substrates capable of autonomously absorbing water samples, to our knowledge. The novel biosensor features miniaturized three-electrode cells and is economically fabricated using screen-printing. Shewanella oneidensis was used as a biocatalyst on the working electrode, with lactate as the electron donor. The electrochemical activity of the biocatalyst decreased in proportion to the concentration of the tested toxic substances, formaldehyde or lead Pb(II) resulting in a reduction in current density, which serve as the sensing output. Quantitative analysis was achieved using only chronoamperometry, which can be easily performed on-site. The total working volume of the biosensor was approximately 2 mL. It was capable of detecting formaldehyde and Pb(II) across concentration ranges of 0.001–10 wt% (10–100,000 ppm) and 0.001–10 ppm, respectively. The detection limit for Pb(II) was relatively low compared with previously reported MEC biosensors. These results demonstrate the strong potential of using the textile-based MEC biosensor for simple and low-cost monitoring of water and wastewater quality.