US EPA

1482886 

Journal Article 

Coal tar dissolution in water-miscible solvents: Experimental evaluation 

Peters, CA; Luthy, RG 

1993 

1 

Environmental Science & Technology
ISSN: 0013-936X
EISSN: 1520-5851 

AMER CHEMICAL SOC 

WASHINGTON 

BIOSIS/94/06165 

27 

13 

2831-2843 

English 

10.1021/es00049a025 

WOS:A1993MJ95600031 

http://://WOS:A1993MJ95600031
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BIOSIS COPYRIGHT: BIOL ABS. Coal tar, a dense nonaqueous phase liquid (NAPL), is a common subsurface contaminant at sites of former manufactured gas plants. A proposed remediation technology is water-miscible solvent extraction, which requires understanding of the effect of water-miscible solvents on the solubility of coal tar. This study investigated this effect and the extent to which multicomponent coal tar could he represented as a pseudocomponent in thermodynamic modeling. The coal tar used in this study showed a predominance of polycyclic aromatic hydrocarbons with no single compound accounting for more than 4% (wt). The bulk solubility of coal tar in water was estimated to be 16 mg using composition data and Raoult's law assumption for aqueous solubility. For three solvents, n-butylamine, acetone, and 2-propanol, equilibrium phase compositions of two-phase coal tar/solvent/water mixtures were experimentally determined using radiolabeled materials and are presented as ternary phase diagrams. 

Biochemical Methods-General; Toxicology-Environmental and Industrial Toxicology; Public Health: Environmental Health-Air