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Published in J Environ Qual 38:2474-2477 (2009)
DOI: 10.2134/jeq2009.0135
© 2009 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
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Pore Water Sampling in Acid Sulfate Soils: A New Peeper Method

Scott G. Johnston*, Edward D. Burton, Annabelle F. Keene, Richard T. Bush, Leigh A. Sullivan and Lloyd Isaacson

Centre for Acid Sulfate Soil Research, Southern Cross GeoScience, Southern Cross Univ., Lismore, NSW 2480, Australia

* Corresponding author (scott.johnston{at}scu.edu.au).

Received for publication April 9, 2009. This study describes the design, deployment, and application of a modified equilibration dialysis device (peeper) optimized for sampling pore waters in acid sulfate soils (ASS). The modified design overcomes the limitations of traditional-style peepers, when sampling firm ASS materials over relatively large depth intervals. The new peeper device uses removable, individual cells of 25 mL volume housed in a 1.5 m long rigid, high-density polyethylene rod. The rigid housing structure allows the device to be inserted directly into relatively firm soils without requiring a supporting frame. The use of removable cells eliminates the need for a large glove-box after peeper retrieval, thus simplifying physical handling. Removable cells are easily maintained in an inert atmosphere during sample processing and the 25-mL sample volume is sufficient for undertaking multiple analyses. A field evaluation of equilibration times indicates that 32 to 38 d of deployment was necessary. Overall, the modified method is simple and effective and well suited to acquisition and processing of redox-sensitive pore water profiles > 1 m deep in acid sulfate soil or any other firm wetland soils.

Abbreviations: ASS, acid sulfate soils






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