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2802613 
Technical Report 
Multi-phase partitioning of trichloroethylene and o-xylene in water suspensions of tuff: Experiments and analysis 
Fuentes, HR; Essington, EH; Smith, JL; Polzer, WL 
1990 
BIOSIS/91/09447 
7 
4 
347-360 
English 
BIOSIS COPYRIGHT: BIOL ABS. Laboratory batch experiments were conducted to determine the multiphase distribution of trichloroethylene (TCE) and ortho-xylene (O-X) among a simulated groundwater, air and Bandelier tuff. A range of concentrations were added to water in batch reactors at the beginning of the experiments and their partitioning between water and air was measured. Equilibrium was practically reached within the first hour. Estimated adsorption on tuff was effectively modeled by Linear and Freundlich isotherms. Henry's Law constants were also calculated for both compounds. Equilbrium data indicate that TCE will partition from an aqueous solution to 64-81% in water, 16-23% in vapor phase, and 2-20% in the tuff. O-X will partition differently: 77-94% in the water, 3-19% as vapor, and 1-13% in the tuff. Analytically chemistry techniques included both radioanalysis and gas chromatography mass spectrometry (GC). The study highlights the need for adequate techniques and procedures to ensure mass