Concentration responses of toxicity sensor with Shewanella oneidensis MR-1 growing in bioelectrochemical systems
Concentration responses of toxicity sensor with Shewanella oneidensis MR-1 growing in bioelectrochemical systems
复制标题
生物电化学系统中生长的 Shewanella oneidensis MR-1 毒性传感器的浓度响应
DOI：
10.1016/j.bios.2012.12.029
复制
发表时间：
2013-05-15
影响因子：
12.6
通讯作者：
Zhou, Qixing
中科院分区：
文献类型：
--
作者：
Wang, Xin;Gao, Ningshengjie;Zhou, Qixing
生物电化学系统(BESS)为检测水样的生物毒性提供了机会。然而，毒素的浓度响应还没有得到详细的研究。以甲醛为有毒物质，在0 mV(相对于饱和甘汞电极)的单室BES中，分析了在0.01%~0.10%浓度范围内的电流响应。在10000,000 S(相当于2.8h)后，电流的衰减率与甲醛浓度成正比增加，在35,000 S(相当于9.7h)时出现峰值，R-2为0.9361。指数衰减方程的拟合结果表明，放大因子(A)与基线电流密切相关，毒性因子(B)与甲醛浓度成正比(从0%到0.08%)，但在0.10%的高浓度范围内除外。这些结果提供了有关BESS中毒素浓度反应的初步信息。(C)2012爱思唯尔B.V.保留所有权利。
Bioelectrochemical systems (BESs) provide an opportunity to detect biological toxicity of water samples. However, the concentration responses of toxins had not been investigated in detail. Using formaldehyde as a toxic substance, the current responses were analyzed over a concentration range from 0.01% to 0.10% in a single chambered BES with 0 mV (versus saturated calomel electrode) applied on the anode. The decay percentages of currents increased in proportion with the concentration of formaldehyde after 10000 s (similar to 2.8 h), with the peak R-2 of 0.9361 observed at 35,000 s (similar to 9.7 h). Fitting results of exponential decay equation showed that the magnification factor (a) closely related with baseline currents and the toxicity factor (b) was in direct proportion to formaldehyde concentration (from 0% to 0.08%) except over the high concentration of 0.10%. These results provide preliminary information about toxin concentration responses in BESs. (c) 2012 Elsevier B.V. All rights reserved.