thumbnail

Prospecting for zones of contaminated ground-water discharge to streams using bottom-sediment gas bubbles

Ground Water

By:
,

Links

  • The Publications Warehouse does not have links to digital versions of this publication at this time

Abstract

Decomposition of organic-rich bottom sediment in a tidal creek in Maryland results in production of gas bubbles in the bottom sediment during summer and fall. In areas where volatile organic contaminants discharge from ground water, through the bottom sediment, and into the creek, part of the volatile contamination diffuses into the gas bubbles and is released to the atmosphere by ebullition. Collection and analysis of gas bubbles for their volatile organic contaminant content indicate that relative concentrations of the volatile organic contaminants in the gas bubbles are substantially higher in areas where the same contaminants occur in the ground water that discharges to the streams. Analyses of the bubbles located an area of previously unknown ground-water contamination. The method developed for this study consisted of disturbing the bottom sediment to release gas bubbles, and then capturing the bubbles in a polyethylene bag at the water-column surface. The captured gas was transferred either into sealable polyethylene bags for immediate analysis with a photoionization detector or by syringe to glass tubes containing wires coated with an activated-carbon adsorbent. Relative concentrations were determined by mass spectral analysis for chloroform and trichloroethylene.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Prospecting for zones of contaminated ground-water discharge to streams using bottom-sediment gas bubbles
Series title:
Ground Water
Volume
29
Issue:
3
Year Published:
1991
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
333
Last page:
340
Number of Pages:
8