Award Date

1-1-1993

Degree Type

Thesis

Degree Name

Master of Science (MS)

Department

Geoscience

First Committee Member

Neil L. Ingraham

Number of Pages

131

Abstract

The exchange of {dollar}\delta\sp{18}{dollar}O, {dollar}\delta{dollar}D, and tritium between water and water vapor was quantified using two methods. The first was quiescent equilibration of water samples having widely contrasting isotopic compositions, surface areas, volumes and temperatures, but similar salinities. Rates of exchange (k) depended on surface area and vapor pressure, while the end-point equilibrium was controlled by volume and isotopic composition of the exchanging waters. Values of k ranged from 0.09 to 0.19 cm/day at 22{dollar}\sp\circ{dollar}C and from 0.86 to 0.92 cm/day at 52{dollar}\sp\circ{dollar}C. The second method involved sparging 30 l of tritiated water (5,000 and 630,000 TU) with a constant 15 l/min flux of water-saturated air (TU {dollar}<{dollar} 10). Half of the tritium was exchanged into the vapor effuent over 40 days; k ranged from 0.025/day to 0.030/day. Equilibration with 630,000 TU was observed over a bubble path of 20 cm, suggesting an alternative method of tritium remediation.

Keywords

Exchange; Experimental; Hydrogen; Isotopes; Oxygen; Results; Vapor; Water

Controlled Subject

Geochemistry; Hydrology

File Format

pdf

File Size

4044.8 KB

Degree Grantor

University of Nevada, Las Vegas

Language

English

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