| 单室MFC型生物毒性传感器对重金属离子的检测研究 |
| 摘要点击 1454 全文点击 1153 投稿时间：2009-09-02 修订日期：2009-10-30 |
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| 中文关键词 微生物燃料电池 重金属 生物毒性 在线检测 生物传感器 |
| 英文关键词 microbial fuel cell(MFC) heavy metals biotoxicity on-line measurement biosensor |
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| 中文摘要 |
| 构建了单室微生物燃料电池（air-cathode microbial fuel cell, ACMFC）型生物毒性传感器，以含重金属离子（Cd2+、Cu2+）人工配水为检测对象，分析了有毒物质对检测仪的抑制率与有毒物质浓度的线性关系.结果表明，①单室MFC型生物毒性传感器结构简单，操作方便，灵敏度较高，可用于水体重金属离子（Cd2+、Cu2+）生物毒性的快速检测；②在实验条件下，该生物毒性传感器检测时间4 h，清洗时间2～10 min，恢复时间4 h；③检测结果显示，实验室自配Cd2+、Cu2+及其混合液IC20值分别为0.6、 0.8和0.25 mg/L，有毒物质浓度与MFC产电量的抑制率呈显著正相关，相关系数分别为0.9960、 0.9744和0.9907. |
| 英文摘要 |
| The principle of the detector is based on the effect of microbial toxicity of water sample on the electricity generation in microbial fuel cell(MFC). The performance of the MFC-type biotoxicity detector was evaluated with the synthetic water containing heavy metals of Cd2+ and Cu2+. The experimental results demonstrated that: ① relative to the conventional methods, the MFC-type detector is easy to operate, and suitable for on-line measurements with high sensitivity; ② it only requires 4 h to complete measurements, and can get ready for next measurement within 4 h; ③ there is a significant linear correlation between the concentration of toxic metal(s) and inhibition ratios in Coulombic yields of MFC. As the IC20 (concentration causing 20% inhibition) of Cd2+, Cu2+ and mixed metals (Cd2+ and Cu2+) were 0.6, 0.8 and 0.25 mg/L, the regression coefficients were shown to be 0.9960, 0.9744 and 0.9907. |
