A lab scale study on the effect of waste lubricating oil to red tilapia, Oreochromis sp. Juveniles

Sa'diah, Binti Salim (2013) A lab scale study on the effect of waste lubricating oil to red tilapia, Oreochromis sp. Juveniles. [Final Year Project Report] (Unpublished)

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Abstract

Waste lubricating oil is defined as used lubricating oil removed from internal combustion engines. Among the sources of this chemical are vehicles, mining, agricultural and construction equipment. Rapid industrialization, urbanization and transportation brought environmental risks to aquatic organism and human health due to improper disposal of waste lubricating oil into environment. A lab scale study was conducted with aimed to determine the effect of waste lubricating oil on red tilapia juveniles, Orechromis sp. in static system. Juveniles were exposed to four different concentration of waste lubricating oil (50 ml, 90 ml, 120 ml and 200 ml) for 96 hours. The lethal concentration, LC50 that caused 50% mortality of Oreochromis sp. was 91.20 ml. There was significant difference in the effects of waste lubricating oil on the mortality rate of Oreochromis sp. between all treatments. The result showed the swimming performances of fish were reduced after 24 hours exposure to concentration 120 and 200 ml of waste lubricating oil. Severe inflammation was observed on the kidney tissue of exposed fish after 96 h experiment. This study used only Oreochromis sp. juvenile; therefore future study should also use other fish species. It is also recommended to carry out this toxicity test in natural environment.

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