SC42/SSS13.14Measurement and interpretation of redox potentials in soils and sediments (co-organized)
|Convener: Michel Vorenhout|
Tue, 25 Apr, 10:30–12:00
This short course aims to give insight into current techniques for in situ measurement of reduction-oxidation potentials in soils and sediments. It gives an overview of techniques for field and laboratory situations, and discusses viable methods for interpretation of the obtained time series.
No previous experience is required to follow this course.
Participants may submit their own data series to the teacher if they would like to discuss the series at the end of this short course in public. Submit your series at least one week before the course starts by e-mail.
1. Redox potential: what is it?
* Values and classes
* Standardization to H2 and possibly with pH
* Limitations of the data, with a focus of possible links to concentrations of ion pairs and O2
2. Measurement technique: electrochemical
* Probe requirements
* Measurement devices: what are critical properties?
* Manual measurements: the good and the bad
* Automated measurements: the good and the bad
* What is actually required in the field?
* How to correctly install probes
* Location of reference probe(s)
* Cable lengths, disturbances etc.
4. Interpretation of data
* Interpretation of variation in redox potential
* Useful data crunching
* Scaling up in space and time
5. Questions/case studies
* When time allows, some case studies from researchers can be discussed. Interested researchers are encouraged to send their results in graph form at least one week before the workshop. These case studies will be shortly discussed.