Record Display for the EPA National Library Catalog
RECORD NUMBER: 7 OF 7| Main Title | Theoretical model and solubility characteristics of Aroclor® 1254 in water : problems associated with low-solubility compounds in aquatic toxicity tests / | ||||||||||||||||||||||||||||||||||||
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| Author | Schoor, W. Peter, | ||||||||||||||||||||||||||||||||||||
| CORP Author | National Environmental Research Center (Corvallis, Or.) | ||||||||||||||||||||||||||||||||||||
| Publisher | National Environmental Research Center, Office of Research and Development, U.S. Environmental Protection Agency, | ||||||||||||||||||||||||||||||||||||
| Year Published | 1974 | ||||||||||||||||||||||||||||||||||||
| Report Number | EPA-660/3-74-013 | ||||||||||||||||||||||||||||||||||||
| Stock Number | PB-240 550 | ||||||||||||||||||||||||||||||||||||
| OCLC Number | 01281094 | ||||||||||||||||||||||||||||||||||||
| Subjects | Solubility--Mathematical models ; Aquatic biology ; Water quality bioassay ; Water--analysis | ||||||||||||||||||||||||||||||||||||
| Additional Subjects | Solubility--Mathematical models ; Aquatic biology ; Water quality bioassay ; Chlorine aromatic compounds ; Solubility ; Water chemistry ; Colloids ; Emulsions ; Adsorption ; Water pollution ; Biphenyl/chloro ; Aroclor 1254 | ||||||||||||||||||||||||||||||||||||
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| Collation | v, 30 pages : illustrations, figures, tables ; 28 cm | ||||||||||||||||||||||||||||||||||||
| Abstract | A theoretical model of the behavior of substances having low water-solubility is presented and discussed with respect to aqueous bioassay. Ultracentrifugal techniques were used in an attempt to study size distributions of Aroclor 1254 aggregates in aqueous emulsions. Results indicate strong adsorption from emulsion by surfaces and a water-solubility at 20C of less than 0.1 microgram/l in distilled water and approximately 40% of that value in water containing 30 g/l NaCl. Implications with regard to aqueous bioassay are discussed. |
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| Notes | "September 1974." Includes bibliographical references (page 30). "Program Element 1EA077, ROAP/Task No. 10AKC/18." |
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| Contents Notes | Conclusions -- Recommendations -- Introduction -- Theory -- Model -- Experiments with Aroclorª 1254 -- Results -- Discussion. A theoretical model of the behavior of substances having low water-solubility is presented and discussed with respect to aqueous bioassay. Ultracentrifugal techniques were used in an attempt to study size distributions of Aroclorª 1254 aggregates in aqueous emulsions. Results indicate strong adsorption from emulsion by surfaces and a water-solubilty at 20ÀC of less than 0.lµg/Á in distilled water and approximately 40% of that value in water containing 30 g/Á NaCl. Implications with regard to aqueous bioassay are discussed. -- Abstract. |