A simple pore water hydrogen diffusion syringe sampler |
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| Authors: | Vroblesky Don A Chapelle Francis H Bradley Paul M |
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| Institution: | U.S. Geological Survey, 720 Gracern Road, Columbia, SC 29210-7651, USA. dvroblesk@usgs.gov |
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| Abstract: | 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. |
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