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Original Articles

An improved datalogger and novel probes for continuous redox measurements in wetlands

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Pages 801-810 | Received 15 Jan 2010, Accepted 11 Oct 2010, Published online: 16 May 2011
 

Abstract

In soils and sediments, the redox potential (Eh) is an important parameter controlling the persistence of many organic and inorganic compounds. Especially in wetlands, fluctuations in redox potential values can be very large and depth dependent. For this reason, field deployable logging systems have previously been developed, yet these systems were limited in several aspects. Here we report the development of an improved multichannel datalogger (HYPNOS) and two novel probes for continuous monitoring of Eh profiles, and briefly illustrate the potential applications. The combination of a multichannel logger with different types of probes allows characterisation of spatial and temporal variability of redox potential in relation to environmental and ecological parameters, and we expect this will greatly enhance our knowledge of the functioning of wetlands.

Acknowledgements

The authors acknowledge the manufacturer of the sturdy probes, Sander Smit of Paleo Terra (http://www.paleoterra.nl) for all his work on probe design. The work in Bangladesh was funded by a National Science Foundation of USA award 0738888 to Yan Zheng, City University of New York. The measurements at Peizermade were funded by Projectbureau Herinrichting Peize.

More information on the HYPNOS datalogger can be obtained from MVH Consult via [email protected]. The READY project publishes manuals, design ideas, experiences and more on the web: http://www.redoxpotential.info/

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