In Situ Representation of Soil/Sediment Conductivity Using Electrochemical Impedance Spectroscopy.
In Situ Representation of Soil/Sediment Conductivity Using Electrochemical Impedance Spectroscopy.
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使用电化学阻抗谱原位表示土壤/沉积物电导率。
DOI：
10.3390/s16050625
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发表时间：
2016-04-30
期刊：
影响因子：
--
通讯作者：
Zhou Q
中科院分区：
文献类型：
--
作者：
Li X;Wang X;Zhao Q;Zhang Y;Zhou Q
土壤电导率（EC）一般是在取土后测量的，因此该方法不能代表土壤原位电导率（例如不同含水量土壤的电导率），因此在某些情况下缺乏可比性。使用由土壤微生物燃料电池的构造转换而来的电阻测量装置，根据使用电化学阻抗谱测量的欧姆电阻（Rs）来评估原位土壤EC。含水量9.1%~37.5%土壤的EC按Rs计算。土壤EC与水分含量之间存在显着的正相关关系（R2 = 0.896，p < 0.01），这证明了该方法的可行性。这种新方法不仅可以代表实际的土壤EC，而且不需要任何预处理。因此它可广泛用于土壤和沉积物EC的测量。
The electrical conductivity (EC) of soil is generally measured after soil extraction, so this method cannot represent the in situ EC of soil (e.g., EC of soils with different moisture contents) and therefore lacks comparability in some cases. Using a resistance measurement apparatus converted from a configuration of soil microbial fuel cell, the in situ soil EC was evaluated according to the Ohmic resistance (Rs) measured using electrochemical impedance spectroscopy. The EC of soils with moisture content from 9.1% to 37.5% was calculated according to Rs. A significant positive correlation (R2 = 0.896, p < 0.01) between the soil EC and the moisture content was observed, which demonstrated the feasibility of the approach. This new method can not only represent the actual soil EC, but also does not need any pretreatment. Thus it may be used widely in the measurement of the EC for soils and sediments.