Removal of lead from used car engine oil employing coconut coir
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Date
2015
Authors
Bandara, A. M. P. S. T. M.
Journal Title
Journal ISSN
Volume Title
Publisher
The University of Peradeniya
Abstract
After using, engine oil is mostly discarded to the environment without any treatment. This used engine oil usually contains heavy metal ion such as Pb²⁺. When released to the envi- ronment, this oil could degrade quickly and release heavy metal ions like Pb²⁺ to soil, waterways making them harmful to animals and humans . This also become a significant problem when used engine oil used as a fuel for furnace where Pb²⁺ is release to the at- mosphere. This study aimed removal of Pb²⁺ ion from the used engine oil employing co- conut coir.
Engine oil drained from car in 3000 km intervals was used for this purpose. Initially, used engine oil was dissolved in toluene and filtered though coconut coir columns. Four con- secutive filtration was done and Pb²⁺ ions in final filtration was measured. In addition to the coconut coir filtration, extraction method was done to remove Pb²⁺ ions from used engine oil. Used engine oil was dissolved in toluene and extracted with deionised water. Six consecutive extractions were done and at each extraction amount of Pb²⁺ ion was measured using UV- Visible spectroscopy and atomic absorption spectroscopy.
Results in both coconut coir filtration and deionised water extraction showed removal of Pb²⁺ significantly compared to initial Pb²⁺ concentration.
The coconut coir filtration method is much suitable to remove Pb²⁺ ions from used engine oil as this method generates less waste.
Description
Keywords
Engine oil , Heavy metal ions , Solvent extraction , UV-Visible spectroscopy , Atomic absorption spectroscopy