Pore water sampling in acid sulfate soils: a new peeper method.
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.
Johnston
Scott G
SG
Centre for Acid Sulfate Soil Research, Southern Cross GeoScience, Southern Cross University, Lismore, NSW 2480, Australia. scott.johnston@scu.edu.au
Burton
Edward D
ED
Keene
Annabelle F
AF
Bush
Richard T
RT
Sullivan
Leigh A
LA
Isaacson
Lloyd
L
D003956:Dialysis / Q000295:instrumentation; D004784:Environmental Monitoring / Q000295:instrumentation*; D012987:Soil; D014867:Water / Q000032:analysis*; D053833:Wetlands
D012987:Soil; D014867:Water