Effects of Sampling Well Construction on H2 Measurements Made for Characterization of Redox Conditions in a Contaminated Aquifer
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- 作者：Poul L. Bjerg ; Rasmus Jakobsen ; Henrik Bay ; Mette Rasmussen ; Hans-J
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- 刊名：Environmental Science & Technology
- 出版年：1997
- 出版时间：October 1997
- 年：1997
- 卷：31
- 期：10
- 页码：3029 - 3031
- 全文大小：122K
- 年卷期：v.31,no.10(October 1997)
- ISSN：1520-5851
文摘
Measurement of hydrogen, H2, has been suggestedforcharacterization of redox levels in groundwater and hasrecently been used in the delineation of redox processesincontaminated aquifer. In this investigation, weevaluatethe influence of materials and age of the well on theH2measurements performed in a leachate-contaminatedsandy aquifer at the Grindsted Landfill, Denmark, Fourtypesof small diameter wells were tested, covering a rangeof materials (teflon, PVC, black iron, and stainless steel)andinstallation methods (driven wells and bailer techniques).The results suggest that the following precautionsaretaken in order to obtain valid measurements of H2: (1)alliron parts should be avoided as well materials, (2) PVC,teflon, and probabaly stainless steel are suitablematerialsfor wells, (3) wells for monitoring H2 levels shall restfora period from installation till sampling (our experiencesindicateapproximately 3 months) before their readings can betrusted, and (4) installation of wells or heavy mechanicalwork in the subsoil can affect the H2 levels innearbywells.