In Situ Representation of Soil/Sediment Conductivity Using Electrochemical Impedance Spectroscopy

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.

[1]  Lu Lu,et al.  Microbial metabolism and community structure in response to bioelectrochemically enhanced remediation of petroleum hydrocarbon-contaminated soil. , 2014, Environmental science & technology.

[2]  J. W. Doranb,et al.  Electrical conductivity monitoring of soil condition and available N with animal manure and a cover crop , 2017 .

[3]  LI Hong-jiang.  The study of electrical resistivity change of different saturation soils contaminated with oil sewage and the contaminated area detecting , 2005 .

[4]  Dong Lu.  Investigation on the electrical resistivity of chromium contaminated soil , 2011 .

[5]  Nan Li,et al.  Sand amendment enhances bioelectrochemical remediation of petroleum hydrocarbon contaminated soil. , 2015, Chemosphere.

[6]  Talitha C. Santini,et al.  Evaluation of soil analytical methods for the characterization of alkaline Technosols: I. Moisture content, pH, and electrical conductivity , 2013, Journal of Soils and Sediments.

[7]  Tang Jingchun,et al.  Effect of the salt contentin soil on bioremediation of soil by contaminated petroleum. , 2013 .

[8]  D. Corwin,et al.  Application of Soil Electrical Conductivity to Precision Agriculture , 2003 .

[9]  Zhang Cai,et al.  Bioelectrochemical stimulation of petroleum hydrocarbon degradation in saline soil using U‐tube microbial fuel cells , 2012, Biotechnology and bioengineering.

[10]  Feng Zhao,et al.  Techniques for the study and development of microbial fuel cells: an electrochemical perspective. , 2009, Chemical Society reviews.

[11]  Yujie Feng,et al.  Use of carbon mesh anodes and the effect of different pretreatment methods on power production in microbial fuel cells. , 2009, Environmental science & technology.

[12]  Xin Wang,et al.  Opening size optimization of metal matrix in rolling-pressed activated carbon air–cathode for microbial fuel cells , 2014 .

[13]  Bart Van der Bruggen,et al.  Electrokinetic Remediation Technique: An Integrated Approach to Finding New Strategies for Restoration of Saline Soil and to Control Seawater Intrusion , 2014 .

[14]  Willem Bouten,et al.  Assessing temporal variations in soil water composition with time domain reflectometry , 1995 .

[15]  X. Qin,et al.  Effect of salinity on the bioremediation of petroleum hydrocarbons in a saline‐alkaline soil , 2012, Letters in applied microbiology.

[16]  Han-Qing Yu,et al.  Stimulating sediment bioremediation with benthic microbial fuel cells. , 2015, Biotechnology advances.

[17]  Abraham Esteve-Núñez,et al.  Silica colloid formation enhances performance of sediment microbial fuel cells in a low conductivity soil. , 2013, Environmental science & technology.

[18]  K. Nealson,et al.  The use of electrochemical impedance spectroscopy (EIS) in the evaluation of the electrochemical properties of a microbial fuel cell. , 2008, Bioelectrochemistry.