Toxicity screening of oil dispersants in Malaysia

Jothy A.A., . and Rohani Ibrahim, . (1989) Toxicity screening of oil dispersants in Malaysia. [Proceedings Paper]

A selection of oil dispersants marketed in the Southeast Asian region were tested for their toxicity against fish under tropical ambient temperatures in an attempt to identify dispersants carrying levels of toxicity acceptable for use in oil spill clean-up operations at sea and on shores when deemed necessary. The method engaged was the static acute bioassay test. Tests were conducted on the dispersant alone and on the dispersant in mixture with a standard light Arabian crude oil the test animal being Tilapia nilotica Oreochromis niloticus. Results generally indicate considerably higher toxicities for dispersant-plus-crude oil mixture when compared to those of dispersant alone. Whilst the United Kingdom toxicity rating of Jeffery and Nichols 1974 for oil dispersants may not be directly applicable to the present dispersant-oil mixture toxicities the same rating may be applied to the toxicity values 48h LC50 derived from dispersant alone. From the 10 dispersants tested without mixing with crude oil Servo CD-2000 and Hydrosol DN-40 were found to be practically non-toxic hence may be considered suitable for use in oil spill clean-up in inshore waters and on shores. The rest of the dispersants were found to be slightly toxic and may be considered for use in the open sea.

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Abstract

A selection of oil dispersants marketed in the Southeast Asian region were tested for their toxicity against fish under tropical ambient temperatures in an attempt to identify dispersants carrying levels of toxicity acceptable for use in oil spill clean-up operations at sea and on shores when deemed necessary. The method engaged was the static acute bioassay test. Tests were conducted on the dispersant alone and on the dispersant in mixture with a standard light Arabian crude oil the test animal being Tilapia nilotica Oreochromis niloticus. Results generally indicate considerably higher toxicities for dispersant-plus-crude oil mixture when compared to those of dispersant alone. Whilst the United Kingdom toxicity rating of Jeffery and Nichols 1974 for oil dispersants may not be directly applicable to the present dispersant-oil mixture toxicities the same rating may be applied to the toxicity values 48h LC50 derived from dispersant alone. From the 10 dispersants tested without mixing with crude oil Servo CD-2000 and Hydrosol DN-40 were found to be practically non-toxic hence may be considered suitable for use in oil spill clean-up in inshore waters and on shores. The rest of the dispersants were found to be slightly toxic and may be considered for use in the open sea.

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Item Type:	Proceedings Paper
Additional Information:	20 graphs; 5 tables; 8 ref. Summary En Ms
AGROVOC Term:	MALASIA
AGROVOC Term:	DISPERSANTES
AGROVOC Term:	TILAPIA NILOTICA/ TOXICIDAD
AGROVOC Term:	PETROLEO
AGROVOC Term:	POLUCION DEL AGUA
AGROVOC Term:	ENSAYO BIOLOGICO
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:26
URI:	http://webagris.upm.edu.my/id/eprint/14810

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