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