A simple pore water hydrogen diffusion syringe sampler.
Molecular hydrogen (H(2)) is an important intermediate product and electron donor in microbial metabolism. Concentrations of dissolved H(2) are often diagnostic of the predominant terminal electron-accepting processes in ground water systems or aquatic sediments. H(2) concentrations are routinely measured in ground water monitoring wells but are rarely measured in saturated aquatic sediments due to a lack of simple and practical sampling methods. This report describes the design and development (including laboratory and field testing) of a simple, syringe-based H(2) sampler in (1) saturated, riparian sediments, (2) surface water bed sediments, and (3) packed intervals of a fractured bedrock borehole that are inaccessible by standard pumped methods.
Vroblesky
Don A
DA
U.S. Geological Survey, 720 Gracern Road, Columbia, SC 29210-7651, USA. dvroblesk@usgs.gov
Chapelle
Francis H
FH
Bradley
Paul M
PM
D004058:Diffusion; D004784:Environmental Monitoring / Q000295:instrumentation* / Q000379:methods; D005618:Fresh Water / Q000032:analysis / Q000737:chemistry; D019015:Geologic Sediments / Q000032:analysis / Q000737:chemistry; D006859:Hydrogen / Q000032:analysis* / Q000737:chemistry; D015203:Reproducibility of Results; D013594:Syringes; D014867:Water / Q000032:analysis* / Q000737:chemistry
D014867:Water; D006859:Hydrogen