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|Title:||Investigation of sinking methods for removal of oil pollution from water surfaces. Report 2, Phase II, methods of test for laboratory evaluation of oil sinking materials|
|Authors:||United States. Coast Guard.|
Roshore, E. C.
Oil pollution of rivers, harbors, etc
|Publisher:||Concrete Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||Miscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; C-71-9 rept.2.|
Abstract: The objective of this program is to investigate materials that can be utilized in the cleanup of massive oil spills by sinking the oil. The program is divided into four phases as follows. Phase I: Survey of the State-of-the-Art. Phase II: Development of Standard Test Procedures. Phase III: Tests of Sinking Materials. Phase IV: Tests Analysis and Conclusions. This report covers Phase II. Laboratory tests were developed to evaluate the effectiveness of oil sinking materials under varying condition. Tests were developed to determine: a. Optimum oil sinking material retention potential. This is an index of the maximum amount of oil a sinking agent or sorbent will retain when submerged. b. Sinking efficiently. This is an evaluation of the practical oil removal effectiveness of sinking agents. The value determined is the ratio of the weight of oil sunk to the weight of sinking agent used under a specific set of conditions. This test distinguishes between sinking agents and sorbents which do not effectively sink oil. c. Dynamic retention ca12abili ty. An evaluation of the ability of a sinking agent to retain sorbed oil in a submerged state when subjected to the effects of current and different bottom conditions. d. Volatile loss-time characteristics of oil retained on glass wool. This is an evaluation of the actual weight of unweathercd free oil left on the water surf ace in the dynamic retention capability test and is used, for calibration purposes, in connection with that test (see c. above). The tests developed are not applicable to Bunker C fuel oil due to its semi solid state at laboratory conditions. No significant difference was noted in results obtained due to water compositions--fresh water or simulated sea water. Tables are presented evaluating the reproducibility of tests. It should be noted that screening tests indicate that very fine materials such as talcs, and materials such as chalks and asbestos, do not act as effective sinking agents without addition of surfactants which were not included.
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